Wednesday, April 18, 2018

Weather Discussion for Wednesday April 18, 2018

Normal high and low temperatures for April 16-April 23  (high/low) Redding 72/48, Chico 74/45, Quincy 66/33, Chester 59/29, Susanville 63/34, Grass Valley 63/40, Weaverville 68/35, Mt. Shasta 60/ 35, Yreka 65/35, Alturas 62/30

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 is off the coast and is moving southeastward.   This system will move inland over Central California later today and tonight.  Northern California will have a few light showers mainly over the foothills and mountains with isolated showers in the valley.  Snow levels will be 5000 feet.  The showers will end tonight with clearing skies early Thursday.  

Thursday afternoon through the mid part of next week high pressure will be along the west coast (see map below).   The north state will be mostly sunny with temperatures running 6 to 12 degrees above normal by the weekend.  Gusty north winds are expected Thursday and Friday. 

It looks like a closed or cutoff low pressure area will develop off the coast late next week.   This would increase the chance of showers and thunderstorms. 

The Old Forecaster

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Monday, April 16, 2018

Weather Discussion for Monday April 16, 2018

Normal high and low temperatures for April 16-April 23  (high/low) Redding 72/48, Chico 74/45, Quincy 66/33, Chester 59/29, Susanville 63/34, Grass Valley 63/40, Weaverville 68/35, Mt. Shasta 60/ 35, Yreka 65/35, Alturas 62/30

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 cold low pressure area is just off our coast and is moving eastward.  This system will move across the area today with showers and thunderstorms.  Because the airmass is so cold hail will associated with some of the thunderstorms.  Snow levels will be 2000 to 2500 feet.

One of the critical weather issues with this low is how fast it gets east of our area and how fast the skies clear tonight.   This system will bring in very cold air tonight and with clear skies and light winds the temperatures will drop.  Some low lying wind sheltered areas in the valley may be near freezing tonight.  Better cover those tomato plants just to be safe.

Tuesday we have partly to mostly sunny skies with below normal temperatures.  Wednesday a weak low pressure area will move across Northern California .  This system will bring light showers to the foothills and mountains with a few sprinkles in the valley.  Snow levels will be near 5000 feet.

Thursday high pressure begins to build along the coast and will hold there through the weekend.  Skies will be mostly clear and temperatures will be above normal by Friday.

The Old Forecaster

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Saturday, April 14, 2018

Weather Discussion for Saturday April 14, 2018

Normal high and low temperatures for April 9-April 16  (high/low) Redding 71/46, Chico 72/45, Quincy 64/32, Chester 57/29, Susanville 62/32, Grass Valley 62/39, Weaverville 67/34, Mt. Shasta 59/ 33, Yreka 63/34, Alturas 60/28

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.

Nice weather today with sunny skies...above normal temperatures and light winds.   However, this morning's satellite picture (below) shows the next low pressure area and frontal system in the Gulf of Alaska moving slowly southeastward.   This system will spread rain over the area Sunday with scattered showers and possible thunderstorms Monday.  Snow levels will drop to 5000 feet by Sunday afternoon and on Monday in some of the showers the snow levels will be 3000 to 3500 feet. 

Tuesday will be partly to mostly sunny.   Wednesday a weak low pressure area will move through Northern California (see map below) with light rain over the foothills and mountains and a few showers in the valley.  Snow levels will be 5000 feet north and 6000 feet south.  

Thursday through the weekend we will have a weak high pressure ridge along the coast.  This will push the jetstream northward.   The northstate will see partly to mostly sunny skies with a few clouds at times from storms moving by to our north.  Temperatures will be normal to a few degrees above normal. 

The Old Forecaster

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Wednesday, April 11, 2018

Weather Discussion for Wednesday April 11, 2018

Normal high and low temperatures for April 9-April 16  (high/low) Redding 71/46, Chico 72/45, Quincy 64/32, Chester 57/29, Susanville 62/32, Grass Valley 62/39, Weaverville 67/34, Mt. Shasta 59/ 33, Yreka 63/34, Alturas 60/28

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.

Not a lot of change in the large scale weather pattern for the next week  We will continue to see fast moving low pressure troughs and frontal systems move across our area every 2 to 3 days. 

The next frontal system is approaching the coast.  This system will spread light rain over Northern California later today and tonight.  The precipitation will turn to showers Thursday morning and decrease during the day.  This system is slightly colder and snow levels will drop to around 5000 feet by early Thursday. Gusty south winds will occur this afternoon and evening. 

Late Thursday afternoon, Friday and Saturday we will see partly to mostly sunny skies with near normal temperatures.  

Sunday another low pressure area will be along the coast (see map below).  This system will bring rain to the north state Sunday with showers on Monday.  Snow levels will start out high but drop to 3500 to 4000 feet in the north by Sunday evening.  

Tuesday we will have a break and then another low pressure trough will move through Wednesday afternoon and Thursday.

The Old Forecaster

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Monday, April 9, 2018

Weather Discussion for Monday April 9, 2018

Normal high and low temperatures for April 9-April 16  (high/low) Redding 71/46, Chico 72/45, Quincy 64/32, Chester 57/29, Susanville 62/32, Grass Valley 62/39, Weaverville 67/34, Mt. Shasta 59/ 33, Yreka 63/34, Alturas 60/28

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.

Ref the question from the comments...The last storm came from the west but merged with a large area of subtropical moisture from the southwest.  This is called by some folks the "pineapple connection" or an "atmospheric river".

Clouds will start increasing later today and tonight as the next low pressure trough and frontal system approaches the coast.  We are still in a weather pattern, and will stay there for the next week, where the jetstream runs across the Pacific and over Northern California.  The Tuesday system will bring light rain to Northern California with snow levels 6000 feet or higher.   It will be followed by a slightly stronger storm on Wednesday with snow levels dropping to around 5000 feet in the north (see map below).  Thursday we will have partly cloudy skies with a few showers mainly over the higher elevations. 

Friday and most of Saturday the north state will be sunny with above normal temperatures and then Sunday and Monday the next storm reaches the coast. 

The Old Forecaster

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Saturday, April 7, 2018

Weather Discussion for Saturday April 7, 2018

Normal high and low temperatures for April 2-April 9  (high/low) Redding 70/43, Chico 71/43, Quincy 61/31, Chester 56/27, Susanville 60/31, Grass Valley 61/38, Weaverville 66/34, Mt. Shasta 59/ 32, Yreka 62/33 Alturas 58/28

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 main frontal band moved across Northern California during the night.  This morning's satellite picture (below) shows the low pressure area is off the Pacific Northwest coast and is moving eastward.  Partly cloudy skies today with scattered showers.  Snow levels will stay 6000 feet or higher.  

For the next week we will be under a weather pattern like the one shown on the map below.  Low pressure troughs and frontal systems will move across the north state every couple of days.  These will be fast moving systems but will bring rain to all areas.  Sunday we will have mostly sunny skies.  Late Monday and Tuesday a trough will bring rain to the area with snow levels 6000 feet or higher.  The next system will be late Wednesday and Thursday with more rain with snow levels down to about 5000 feet.   Next storm in the series will be next Saturday and Sunday.  Days between the storms will be partly to mostly sunny with near normal temperatures. 

The longer range models show this weather pattern continuing for the next 10 to 14 days.
The Old Forecaster

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Wednesday, April 4, 2018

Weather Discussion for Wednesday April 4, 2018

Normal high and low temperatures for April 2-April 9  (high/low) Redding 70/43, Chico 71/43, Quincy 61/31, Chester 56/27, Susanville 60/31, Grass Valley 61/38, Weaverville 66/34, Mt. Shasta 59/ 32, Yreka 62/33 Alturas 58/28

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 jetstream or storm track  is continuing to drop southward.   We will see several frontal systems move across the north state over the next week.  Today a very weak system is bringing a few light showers to the higher elevations north of Redding.  Thursday a stronger system will spread light rain or showers across all of the north state.   Snow levels will be 6000 feet or higher. 

Friday and early Saturday a strong (for this time of year) low pressure trough will move across Northern California (see map below).  Moderate to locally heavy rain is expected, with snow levels continuing 6000 feet or higher.  Strong gusty south winds will occur Friday evening and early Saturday with gusts 40 to 50 mph in the Redding area and 60 mph over the higher elevations.  The precipitation will turn to showers Saturday and end by evening.  Snow levels Saturday will drop to 4000 to 5000 feet. Sunday and most of Monday will be partly to mostly sunny.

Late Monday and Tuesday another low pressure trough will move through the area with more rain and wind.  Snow levels will be 5000 to 6000 feet.   it looks like another system will hit the area late Wednesday and Thursday.

The Old Forecaster

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Monday, April 2, 2018

Weather Discussion for Monday April 2, 2018

Normal high and low temperatures for April 2-April 9  (high/low) Redding 70/43, Chico 71/43, Quincy 61/31, Chester 56/27, Susanville 60/31, Grass Valley 61/38, Weaverville 66/34, Mt. Shasta 59/ 32, Yreka 62/33 Alturas 58/28

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 change in the weather pattern is beginning.  The high pressure ridge that has been off the coast is weakening and this will allow the jetstream (storm track) to drop southward.  Today and part of Tuesday we will see mostly clear skies with some high cloudiness.  Temperature will continue a few degrees above normal and there will be gusty north winds in some areas today.  Tuesday night and Wednesday a weak frontal system will brush the north end of the state with some clouds and a few light showers over the north coast and northern mountains.  Thursday the clouds increase as a slightly stronger system brings light showers to the mountains with a chance of sprinkle or shower in the north end of the valley. 

Friday and Saturday a strong (for this time of year) low pressure area will be along the west coast (see map below).  Friday through midday Saturday we will have rain, heavy at times, with strong and gusty south winds.  Snow levels will be 6000 feet lowering to 4000 feet by Saturday. 

The precipitation will turn to showers Saturday afternoon and Sunday and the winds will decrease.  Monday looks partly to mostly sunny with another storm possible by Tuesday. 

The Old Forecaster

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Saturday, March 31, 2018

Weather Discussion for Saturday March 31, 2018

Normal high and low temperatures for March 26-April 2  (high/low) Redding 69/44, Chico 69/43, Quincy 60/30, Chester 55/27, Susanville 57/30, Grass Valley 61/38, Weaverville 63/33, Mt. Shasta 57/ 31, Yreka 60/31 Alturas 56/26

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.

Today Northern California will be partly sunny with high cloudiness.  Temperatures will continue above normal with light winds.   Easter Sunday will be sunny with continued above normal temperatures.  

Spring and fall are the times when the computer models seem to have the most trouble.  We are transitioning between our wet and dry weather patterns.  Starting Monday we will have one thosetimes.   The high pressure ridge that has been along the coast will weaken and the jetstream will begin to drop southward.   Where the models disagree is where the jetstream or storm track ends up.  One run it is over San Francisco by midweek.   The next run like the one shown below it stays to our north.   The one thing they do agree on is starting next week we will have a series of frontal systems move across the north state.  Probably weak systems.  

So after all the excuses here is what I think next week will bring.  One front goes through late Monday and Tuesday with clouds and isolated showers north of Redding.   The next system will be late Wednesday and Thursday and will be just a little stronger with clouds and showers over the mountains with maybe a sprinkle in the north valley.  The best chance of widespread rain and showers will be the system late Friday and Saturday. 

The Old Forecaster

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Wednesday, March 28, 2018

Weather Discussion for Wednesday March 28, 2018

Normal high and low temperatures for March 26-April 2  (high/low) Redding 69/44, Chico 69/43, Quincy 60/30, Chester 55/27, Susanville 57/30, Grass Valley 61/38, Weaverville 63/33, Mt. Shasta 57/ 31, Yreka 60/31 Alturas 56/26

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 along and over the west coast.  Today and Thursday we will see sunny skies with daytime temperatures 10 to 15 degrees above normal.  Gusty north winds will occur in some areas today.  

Friday the high pressure ridge will begin to slowly weaken.  This will allow temperatures to slowly cool.  We will continue to have partly to mostly sunny skies with a few high clouds from frontal systems moving by to our north.  Winds will be light. 

The ridge will have weakened enough by next Tuesday to allow the jetstream drop close to Northern California (see map below).   Tuesday and early Wednesday a weak frontal system and low pressure trough will move through the north state.  This system will bring showers to the higher elevations and a chance of a sprinkle in the valley.
The Old Forecaster

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Monday, March 26, 2018

Weather Discussion for Monday March 26, 2018

Normal high and low temperatures for March 26-April 2  (high/low) Redding 69/44, Chico 69/43, Quincy 60/30, Chester 55/27, Susanville 57/30, Grass Valley 61/38, Weaverville 63/33, Mt. Shasta 57/ 31, Yreka 60/31 Alturas 56/26

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 building along the west coast and will hold there for the next 5 to 7 days (see map below).   Today through Thursday we will see mostly sunny skies with temperatures 10 to 15 degrees above normal by Wednesday.  This means some north valley locations will be over 80. Gusty north winds will occur in some areas through Wednesday. 

The high will begin to weaken a little on Friday.  This will cool temperatures slightly.   Saturday afternoon and again Monday weak fronts will brush the north end of the state with a few clouds.  There could be isolated showers near the Oregon border. 

The Old Forecaster

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Saturday, March 24, 2018

Weather Discussion for Saturday March 24, 2018

Normal high and low temperatures for March 18-March 25  (high/low) Redding 66/43, Chico 66/41, Quincy 58/30, Chester 53/27, Susanville 55/30, Grass Valley 59/37, Weaverville 61/32, Mt. Shasta 56/ 32, Yreka 58/31 Alturas 55/26

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 is just off the coast and is moving eastward.  This system will move across Northern California today with showers and possible thunderstorms.  Snow levels will be 2000 feet north and 2500 to 3000 feet south.  Sunday there will be some lingering showers over the mountains which will end by late afternoon.

Monday high pressure begins to build along and over the west coast and will hold there for the next 5 to 7 days (see map below).  Skies will be mostly sunny with a few high clouds.  Temperatures will be warming and by mid week will be 12 to 18 degrees above normal which means some north valley locations will break the 80 degree mark.  Gusty north winds will occur in some areas Monday through Thursday. 

The Old Forecaster

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