Wednesday, December 30, 2020

Weather Discussion for Wednesday Dec. 30 2020

Normal high/ low temperatures for Dec 28-Jan 4  (high/low) Redding 53/35, Chico 53/34, Quincy 44/22, Chester 39/18, Susanville 39/19, Grass Valley 52/31, Weaverville 45/27, Mt. Shasta 42/25, Yreka 42/24, Alturas 40/14

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

Fairly significant changes in the large scale weather pattern may occur over the next 7 to 10 days.  Map 1, below, shows the upper air weather pattern for today.  The jetstream is to our north.  This means just the southern end of the storm systems brush Northern California.  Map 2, below, shows the upper air weather pattern for next Tuesday and Wednesday.  There is a strong jetstream running across the Pacific and right over Northern California.  This means the main part of the storms would affect our area.  We will have low pressure troughs and frontal systems moving through the north state every couple of days.  The systems start out fairly weak but will become better precipitation producers by next week.  

The first front comes through tonight and early Thursday with light precipitation and snow levels 3500 feet north and 4500 feet south.  Thursday night and early Friday there will be a break and then another weak system will move through late Friday and Saturday bringing light rain or showers our area with snow levels near 4000 feet.   Saturday afternoon and part of Sunday look partly cloudy to cloudy with the chance of showers.

A stronger storm will move in Sunday night and Monday and then a stronger system Tuesday night and Wednesday. Snow levels look to be about 4000 feet north and higher south.  Gusty south winds will precede these storms. 

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Monday, December 28, 2020

Weather Discussion for Monday Dec. 28, 2020

 Normal high/ low temperatures for Dec 28-Jan 4  (high/low) Redding 53/35, Chico 53/34, Quincy 44/22, Chester 39/18, Susanville 39/19, Grass Valley 52/31, Weaverville 45/27, Mt. Shasta 42/25, Yreka 42/24, Alturas 40/14

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

The low pressure area is now moving into Central and Southern California.  This system will bring light rain today from Chico southward with partly cloudy to partly sunny skies north of Chico.  Tuesday we will see partly to mostly sunny skies with near normal temperatures and light north winds.

Wednesday afternoon and early Thursday a weak low pressure trough will move across Northern California.  This system will bring light precipitation to the area with snow levels 3000 to 4000 feet.  

There will be a short break between systems Thursday afternoon and early Friday.  Starting Friday afternoon we begin to move into what could be a very wet pattern.  The jetstream will become well established across the Pacific and move into Northern California (see map below).  This will usher a series of frontal systems across the north state.  The first system will be move through late Friday with light precipitation.  Snow levels will be 4000 to 5000 feet.  A stronger storm hits the area late Saturday and Sunday and then still stronger systems late Monday and again on Wednesday.  Models are in agreement on the development of this wet pattern...lets hope they are right.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Saturday, December 26, 2020

Weather Discussion for Saturday Dec. 26, 2020

Normal high/ low temperatures for Dec 21-Dec 28  (high/low) Redding 53/35, Chico 53/35, Quincy 44/24, Chester 41/20, Susanville 40/21, Grass Valley 52/31, Weaverville 46/29, Mt. Shasta 41/24, Yreka 43/24, Alturas 41/17

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

Mostly sunny today with afternoon temperatures 5 to 10 degrees above normal.  Gusty north winds will occur in some areas.  

The low pressure trough is now moving eastward.  Today we will have partly cloudy to cloudy skies with scattered showers.  Snow levels will be 2500 feet north and 3500 feet south.  The showers will end by this evening.  

This morning's satellite picture (below) shows an impressive storm system in the Gulf of Alaska.  However, as was mentioned in the comments on Wednesday's blog, the jetstream will split and this low pressure area will move through central and southern California Sunday afternoon and Monday (see map below).  So Sunday afternoon through Monday afternoon the further south you go the wetter it will be.   Light rain south of Redding and probably no precipitation in Siskiyou County.  Snow levels will be 2000 to 3000 feet.  

Tuesday will be partly sunny to partly cloudy with near normal temperatures.  The next frontal system will bring rain to the area Wednesday afternoon through Thursday afternoon.  This will not be a strong system and snow levels will be 3000 to 4000 feet.  

There will be a break late Thursday through Friday afternoon and the late Friday through the weekend looks wet as a series of storms move through. 

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Wednesday, December 23, 2020

Weather Discussion for Wednesday Dec. 23, 2020

   Normal high/ low temperatures for Dec 21-Dec 28  (high/low) Redding 53/35, Chico 53/35, Quincy 44/24, Chester 41/20, Susanville 40/21, Grass Valley 52/31, Weaverville 46/29, Mt. Shasta 41/24, Yreka 43/24, Alturas 41/17

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

Mostly sunny today with afternoon temperatures 5 to 10 degrees above normal.  Gusty north winds will occur in some areas.  

Things start to change Thursday.  The low pressure area and frontal system shown on this morning's satellite picture (below) will be slowly moving toward the coast.  Clouds will be increasing and temperatures cooling.  The front will bring rain to Northern California Friday with scattered showers Saturday.  Snow levels will lower to 3000 feet north and 4000 feet south by Friday afternoon.  Gusty south winds will precede the front.

The showers end by late Saturday afternoon and there will be some clearing.   However, the next storm system will spread light rain over the area Sunday.  Snow levels with this system will be 2000 feet north and 3000 feet south.  However, cold trapped air in the canyons and valleya will lower the snow level to  near 1000 feet from Redding northward. 

Skies clear out Monday afternoon but another storm should reach the coast Wednesday.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Monday, December 21, 2020

Weather Discussion for Monday Dec. 21, 2020

  Normal high/ low temperatures for Dec 21-Dec 28  (high/low) Redding 53/35, Chico 53/35, Quincy 44/24, Chester 41/20, Susanville 40/21, Grass Valley 52/31, Weaverville 46/29, Mt. Shasta 41/24, Yreka 43/24, Alturas 41/17

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

The low pressure area approaching the Pacific Northwest will brush Northern California later today as it drops southeastward.  Not much moisture for our area but there will be a few light showers over the higher elevations late this afternoon and tonight.  Snow levels will be 5000 to 6000 feet.  

Skies will be clear by Tuesday morning with mostly clear skies through Thursday afternoon.  Temperatures will be above normal.  Gusty north winds will occur in some areas Tuesday with light winds Wednesday and Thursday.

Clouds start increasing Thursday afternoon.  Friday a low pressure trough will extend from the Gulf of Alaska to off the west coast (see map below)..  This will drop the jetstream over Northern California and open the door for frontal systems to move through.  The first system will bring rain to the north state Friday with another storm due in Sunday and Monday.  Snow levels with the Friday storm will be near 5000 feet but lower with the Sunday storm.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Saturday, December 19, 2020

Weather Discussion for Saturday Dec. 19, 2020

 Normal high/ low temperatures for Dec 14-Dec 21  (high/low) Redding 53/36, Chico 54/35, Quincy 45/24, Chester 41/21, Susanville 41/21, Grass Valley 52/31, Weaverville 46/29, Mt. Shasta 41/25, Yreka 44/25, Alturas 42/18

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

High pressure is off the coast and a low pressure area and frontal system are moving into the Pacific Northwest (see satellite picture below).  Today and Sunday will be sunny with daytime temperatures 5 to 10 degrees above normal.  Winds will be light.  

Monday a low pressure trough will move into the Pacific Northwest.  However, the southern end will brush Northern California (see map below).  This system will bring partly cloudy skies to the north state with a few light showers over the areas north and east of the valley.  Snow levels will be near 4000 feet.  

Skies will be clearing early Tuesday with mostly clear skies through Thursday.  Daytime temperatures will continue above normal.  Gusty north winds will occur late Tuesday through early Thursday.  

Friday a low pressure trough and frontal system will bring light rain to the north state with snow levels 3500 to 4500 feet.  there will be a break Saturday and then another storm could bring rain to the area Sunday.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Wednesday, December 16, 2020

Weather Discussion for Wednesday Dec. 16, 2020

 Normal high/ low temperatures for Dec 14-Dec 21  (high/low) Redding 53/36, Chico 54/35, Quincy 45/24, Chester 41/21, Susanville 41/21, Grass Valley 52/31, Weaverville 46/29, Mt. Shasta 41/25, Yreka 44/25, Alturas 42/18

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

A low pressure area and frontal system are approaching the coast and will spread rain over Northern California later today.  The rain will end late tonight.  Snow levels will be near 5000 feet lowering to 3500 to 4000 feet tonight.  Thursday there will be a few showers over the mountains in the morning with decreasing clouds during the day.

Friday through the weekend a weak high pressure ridge will be over the west coast (see map below).  The north state will be mostly sunny with a few clouds at times from fronts moving by to our north.  Temperatures will be a few degrees above normal and winds will be light. 

Early next week the high will shift westward.  This will allow temperatures to cool to normal.  However, it will still be dry.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Monday, December 14, 2020

Weather Discussion for Monday Dec. 14, 2020.

 Normal high/ low temperatures for Dec 14-Dec 21  (high/low) Redding 53/36, Chico 54/35, Quincy 45/24, Chester 41/21, Susanville 41/21, Grass Valley 52/31, Weaverville 46/29, Mt. Shasta 41/25, Yreka 44/25, Alturas 42/18

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

The low pressure trough has moved eastward and today will be mostly sunny with near normal temperatures and light winds.  Tuesday we will see a few clouds with light showers possible on the north coast and near the Oregon Border. 

Wednesday another low pressure trough and frontal system will move through the area (see map below).  Rain is expected over the north state with snow levels starting out 4500 to 5500 feet but dropping to 3000 to 3500 feet in the north by Wednesday afternoon.   The precipitation ends early Thursday and skies will be clearing.  

Friday and Saturday look party sunny with a few mid and high clouds.  Temperatures will be near normal and winds will be light.  Late Sunday and Monday another storm system could bring rain to the area.  

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Saturday, December 12, 2020

Weather Discussion for Saturday Dec. 12, 2020

 Normal high/ low temperatures for Dec 7-Dec 14  (high/low) Redding 55/36, Chico 56/36, Quincy 47/26, Chester 43/22, Susanville 43/22, Grass Valley 53/33, Weaverville 48/29, Mt. Shasta 43/26, Yreka 45/25, Alturas 44/18

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

The first frontal system was weaker than expected and moved though last night.  Today we will se partly cloudy skies with a few isolated showers over the mountains.  The next frontal system is approaching the coast and will bring rain to Northern California Sunday.  Snow levels will be 4000 to 5000 feet.  Gusty south winds will precede the front.  

Monday and part of Tuesday skies will be partly to mostly clear with near normal temperatures.  The next low pressure trough will spread clouds over the north state late Tuesday with rain over the entire area Wednesday (see map below).  Snow levels will be near 4000 feet.  

Skies clear out Thursday with partly to mostly sunny skies Friday through the weekend.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Wednesday, December 9, 2020

Weather Discussion for Wednesday Dec. 9, 2020

Normal high/ low temperatures for Dec 7-Dec 14  (high/low) Redding 55/36, Chico 56/36, Quincy 47/26, Chester 43/22, Susanville 43/22, Grass Valley 53/33, Weaverville 48/29, Mt. Shasta 43/26, Yreka 45/25, Alturas 44/18

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

Mostly sunny today with a few high clouds.  Temperatures will be a little cooler but still above normal.  Gusty north winds are expected.   Thursday the high pressure area will continue to shift west and weaken.  A low pressure trough will move across the Pacific Northwest and bring a few clouds to Northern California with isolated light mountain showers.  

Friday the low pressure area in the Gulf of Alaska will deepen and push the jetstream southward over Northern California (see map below).  This will allow a couple of frontal systems to move through the area.  Clouds increase Friday with rain reaching the north coast late Friday.  Saturday and Sunday will be cloudy with periods of rain.  The snow level will be near 6000 feet...but early Saturday could be locally lower north of Redding due to cold air trapped air in the valleys.  The snow level will drop to 5000 feet late Sunday.  Gusty south to southwest winds are expected.  Monday and early Tuesday we will see partly cloudy skies with scattered showers.  Snow levels will be 3500 to 4000 feet.

Skies clear out late Tuesday with mostly skies Wednesday and Thursday.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Monday, December 7, 2020

Weather Discussion for Monday Dec. 7, 2020

   Normal high/ low temperatures for Dec 7-Dec 14  (high/low) Redding 55/36, Chico 56/36, Quincy 47/26, Chester 43/22, Susanville 43/22, Grass Valley 53/33, Weaverville 48/29, Mt. Shasta 43/26, Yreka 45/25, Alturas 44/18

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

High pressure is still over the western U.S.  However, changes in the large scale weather pattern are beginning.  Over the next 5 days the high pressure ridge will shift westward and be off the coast.  Northern California will still be mostly sunny with a few clouds from fronts passing by to our north.  Temperatures today will be 12 to 16 degrees above normal but will slowly cool to near normal by Saturday.  Gusty north will occur today then decrease Tuesday morning, but then increase again Wednesday.  The north winds will end late Thursday.

Late Saturday the jetstream will sag southward and this will allow a low pressure trough to move through the area Sunday (see map below).  This trough will bring light rain to the north state Sunday and early Monday.  Snow levels will start out high by lower to 5000 feet by Sunday afternoon.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Saturday, December 5, 2020

Weather Discussion for Saturday Dec. 5, 2020

  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester 45/23, Susanville 46/25, Grass Valley 55/33, Weaverville 50/30, Mt. Shasta 46/26, Yreka 48/27, Alturas 46/20

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

The frontal system approaching the coast (see satellite picture below) is splitting apart.  The southern portion will move into Oregon tonight and will be over Nevada by Sunday night and then off the Southern California coast by Monday night.  This system will bring a few very light showers to the mountains tonight and early Sunday.  Snow levels will be high.  Temperatures will continue above normal today and Sunday Gusty north winds will move into the area tonight and continue through Monday.

The large scale weather pattern changes late Sunday and Monday.  The high pressure ridge moves from just to our east over the western U.S. to just to our west off the coast (see map below).  This changes our weather from dry, above normal temperatures, and mostly light winds to dry, near normal temperatures and more periods of gusty north  winds.   We will see a few clouds as storms move into western Canada and then drop southeastward into the Great Basin.  Temperatures will be above normal through midweek and then cool to near normal by the weekend.  Gusty north winds end late Monday but then startup again late Wednesday and continue through Friday.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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Wednesday, December 2, 2020

Weather Discussion for Wednesday Dec. 2, 2020

 Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester 45/23, Susanville 46/25, Grass Valley 55/33, Weaverville 50/30, Mt. Shasta 46/26, Yreka 48/27, Alturas 46/20

  
This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

Frontal systems will continue to move across the Pacific and then hit the high pressure ridge that is over the western U.S..  Most of these storms will be shunted to the north with only a few mid and high clouds moving across Northern California.  The system Saturday (see map below)  may be strong enough to bring a few light showers to the north coast and near the Oregon border.  This system will be followed by another round of strong and gusty north winds Sunday through Tuesday.  The next week looks mostly sunny except some clouds Saturday. Daytime temperatures will continue above normal.

The Old Forecaster

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CALTRANS traffic cameras  Try this link  Normal high/ low temperatures for Nov 30-Dec 7  (high/low) Redding 58/38, Chico 58/37, Quincy 49/26, Chester  you will have to move the page to see our area

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