Wednesday, November 22, 2017

Weather Discussion for Wednesday November 22, 2017

Normal high and low temperatures for Nov 20-Nov 27  (high/low)...Redding 59/38, Chico 61/38, Quincy 52/27, Chester 47/25, Susanville 48/26, Grass Valley 57/34, Weaverville 54/31, Mt. Shasta 48/28, Yreka 51/27, Alturas 49/21

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 weather across Northern California is quite varied today.   This morning's satellite picture (below) shows the sub tropical moisture streaming northward into the Pacific Northwest.  The northwest corner of the state is cloudy with rain.  The valley has locally dense fog which will burn off in the next few hours.   The rest of the state is partly to mostly sunny.

Thursday a weak frontal system will move across our area with clouds and a few showers.  Snow levels will be high.  Friday there will be a brief break, but clouds will increase Saturday as a low pressure trough approaches the coast (see map below).  Rain will spread over the area during the day and continue through Sunday.  Snow levels will start out at 6000 feet or higher but will drop to 4500 to 5000 feet by Sunday afternoon.  

Skies will be clearing Monday with mostly sunny skies and slightly above normal temperatures expected Tuesday and Wednesday.

The Old Forecaster

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Monday, November 20, 2017

Weather Discussion for Monday November 20, 2017

Normal high and low temperatures for Nov 20-Nov 27  (high/low)...Redding 59/38, Chico 61/38, Quincy 52/27, Chester 47/25, Susanville 48/26, Grass Valley 57/34, Weaverville 54/31, Mt. Shasta 48/28, Yreka 51/27, Alturas 49/21

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 normal late fall weather pattern for the next few days.  High pressure has formed over the southwestern U.S. and is ridging northward over California.  Normally with this pattern we would see sunny skies and above normal temperatures.   The large scale low pressure area in the Gulf of Alaska continues to generate frontal systems and send them across the Pacific Northwest.  Looking at the satellite picture (below) you can see that the low has tapped subtropical moisture and is pulling lots of clouds northeastward toward the west coast.  The map below shows little change in the pattern through early Saturday.

Today a frontal system is moving into the Pacific Northwest and the tail end of it is brushing northern California.  Due to the sub tropical moisture this system will bring moderate precipitation to the northwest corner of the state today with amounts getting lighter the further south and east you go.  Snow levels will be 6000 feet or higher.

Tuesday and Wednesday Northern California will see partly cloudy to cloudy skies with a few showers over the northwest corner of the state.  Thursday another weak frontal will brush the north state and bring a chance of showers to all areas.  Snow levels will continue high.

Friday and early Saturday we will have partly cloudy to cloudy skies with a few showers over the north coast and northern mountains.  Late Saturday the high will weaken and the jetstream will drop southward.  This allow a stronger storm system to move into the area Sunday and Monday with light to moderate rain and sow levels dropping to 4500 to 5000 feet by Monday. 

The Old Forecaster

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Saturday, November 18, 2017

Weather Discussion for Saturday November 18, 2017

Normal high and low temperatures for Nov 13-Nov 20  (high/low)...Redding 63/40, Chico 63/39, Quincy 54/29, Chester 49/27, Susanville 51/28, Grass Valley 59/37, Weaverville 56/32, Mt. Shasta 51/31, Yreka 53/29, Alturas 51/23

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.

Clear skies and calm winds tonight will allow some areas in the north end of he valley to at or near freezing.  

Over the next week the low pressure area in the Gulf of Alaska will continue to generate frontal systems and will also pull warm moist air northeastward to mix into them.   However, at the same time a high pressure ridge will develop over the southwestern U.S. and will build northward.  This will push the jetstream or storm track to our north and take most of the moisture with these systems to the north (see map below).  This means just a few clouds and light precipitation as the storms move into the Pacific Northwest.   

Clouds will increase Sunday as the first system approaches the Pacific Northwest.  Sunday night and Monday the north state will be partly cloudy to cloudy with light rain or showers over the coastal mountains and areas north of Redding with scattered showers over the Sierra Cascades.  Snow levels will be above 6000 feet.  Tuesday there will still be a few showers over the north coast and near the Oregon border with partly cloudy skies elsewhere.  Wednesday and Thursday we will see partly cloudy to cloudy skies with light showers over the areas west and north of the valley.   

Friday through the weekend look partly to mostly sunny with above normal temperatures. 

The Old Forecaster

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Wednesday, November 15, 2017

Weather Discussion for Wednesday November 15, 2017

Weather Discussion for Monday November 13, 2017

Normal high and low temperatures for Nov 13-Nov 20  (high/low)...Redding 63/40, Chico 63/39, Quincy 54/29, Chester 49/27, Susanville 51/28, Grass Valley 59/37, Weaverville 56/32, Mt. Shasta 51/31, Yreka 53/29, Alturas 51/23

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.

Another low pressure trough is along the coast.  This system will move across Northern California later today and Thursday.  Moderate to heavy precipitation is expected this afternoon and tonight with showers Thursday.  Snow levels this morning are 4000 to 5000 feet north and 6000 feet south.  Snow levels will rise by this evening to above 6000 feet and then drop in the north to 4000 to 5000 feet by midday Thursday.  Gusty south winds will occur over the higher elevations today. 

 Friday and Saturday the north state will have partly to mostly sunny skies with near normal temperatures and light winds.  

Clouds will begin increasing Sunday as the next low pressure trough approaches the coast (see map below).  This will be a warmer and wetter system with high snow levels.  Precipitation will start late Sunday and continue through Tuesday afternoon.  The problem is that the models are not consistent on the storm's track.  One run puts is right over Northern California and then the next takes just to our north.  

Wednesday through Friday look mostly clear as high pressure will be over our area. 

The Old Forecaster

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Monday, November 13, 2017

Weather Discussion for Monday November 13, 2017

Normal high and low temperatures for Nov 13-Nov 20  (high/low)...Redding 63/40, Chico 63/39, Quincy 54/29, Chester 49/27, Susanville 51/28, Grass Valley 59/37, Weaverville 56/32, Mt. Shasta 51/31, Yreka 53/29, Alturas 51/23

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 associated trough is along the west coast and moving slowly eastward.  This system will send bands of clouds and rain across Northern California today and tonight.   Snow levels will be 6000 feet or higher this morning by will lower to 5000 feet in the north tonight.  There will be a few light snow flurries over the Sierras Tuesday morning but they will end during the day.  The rest of the north state will be partly cloudy to partly sunny Tuesday.

The next low pressure trough will move through the area Wednesday and Thursday (see map below).   This will be a colder system with precipitation spreading over the area Wednesday morning and continuing through Thursday afternoon.  Snow levels will be 3500 to 4000 feet north and 5000 feet south. 

Friday we will see mostly sunny skies with slightly below normal temperatures and light winds.   Clouds begin  to increase Saturday and then a warmer storm system will move through the area Sunday and Monday with snow levels back above 6000 feet. 

The Old Forecaster

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Saturday, November 11, 2017

Weather Discussion for Saturday November 11, 2017

Normal high and low temperatures for Nov 6-Nov 13  (high/low)...Redding 66/42, Chico 66/41, Quincy 57/30, Chester 53/27, Susanville 54/29, Grass Valley 62/37, Weaverville 60/33, Mt. Shasta 53/31, Yreka 56/31, Alturas 55/24

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 east.   Today will be partly cloudy to partly sunny with near normal temperatures.   This morning's satellite picture (below) shows the next frontal system dropping southeastward from the Gulf of Alaska.   Precipitation from this system will reach the north state Sunday afternoon and evening with periods of rain or showers Monday and early Tuesday.  Snow levels will drop to 4000 to 5000 feet by Monday afternoon.  

Tuesday we will see partly cloudy skies with a few snow flurries over the higher elevations.   The next low pressure trough and frontal system reaches the north coast early Wednesday and will spread rain and snow across the area Wednesday.  Snow levels will be 4000 feet north and 5000 feet south.  The precipitation turns to showers early Thursday and ends by Thursday afternoon.  

There will be a brief break Thursday afternoon and Friday and then more rain by the weekend. 

The Old Forecaster

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Wednesday, November 8, 2017

Weather Discussion for Wednesday November 8, 2017

Normal high and low temperatures for Nov 6-Nov 13  (high/low)...Redding 66/42, Chico 66/41, Quincy 57/30, Chester 53/27, Susanville 54/29, Grass Valley 62/37, Weaverville 60/33, Mt. Shasta 53/31, Yreka 56/31, Alturas 55/24

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 will remain there through Thursday and then move slowly eastward across Northern California Friday.  This low will bring periods of light to moderate rain to the north state today and Thursday.   Snow levels will be 5000 to 6000 feet north and higher south.  Gusty south winds will occur over the exposed areas and ridges.   Friday the precipitation will turn to showers and will end by late afternoon.  Snow levels will be 5000 feet north and 6000 feet south.  

Saturday and part of Sunday we will see partly sunny to partly cloudy skies.   Late Sunday and Monday another low pressure area will be along the coast (see map below).  Light to moderate rain is expected late Sunday and Monday.    Snow levels will continue 5000 to 6000 feet.

Tuesday afternoon and Wednesday a weaker trough will pass across our area.  This system will bring light rain or showers to the foothills and mountains and north end of the valley.

The Old Forecaster

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