Wednesday, August 15, 2018

Weather Discussion for Wednesday August 15, 2018

Normal high and low temperatures for Aug 13-Aug 20  (high/low) Redding 97/62, Chico 94/58, Quincy 88/41, Chester 84/44, Susanville 87/49, Grass Valley 87/55, Weaverville 94/47, Mt. Shasta 85/49, Yreka 90/51, Alturas 87/41

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.

Late yesterday enough subtropical moisture moved northward to trigger isolated thunderstorms over the higher elevations north and east of the valley.  Today there still could be isolated activity over Modoc and eastern Lassen counties.  Temperatures today will be normal or slightly above.  South winds are expected in the afternoon.

The high pressure will rebuild over the western U.S. over the next several days (see map below).  This will cause temperatures to warm and by the weekend daytime temperatures will be 6 to 10 degrees above normal.  Winds will be south to  southwest in the afternoon. 

A slow cooling trend should start early next week as the high weakens and a weak upper level low pressure area forms off the coast.  This low could trigger more thunderstorm activity next week. 

The Old Forecaster

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Monday, August 13, 2018

Weather Discussion for Monday August 13, 2018

Normal high and low temperatures for Aug 13-Aug 20  (high/low) Redding 97/62, Chico 94/58, Quincy 88/41, Chester 84/44, Susanville 87/49, Grass Valley 87/55, Weaverville 94/47, Mt. Shasta 85/49, Yreka 90/51, Alturas 87/41

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.

Once again not much change for the next week.   High pressure will remain over the western U.S. (see map below).   Skies will be sunny...smoky in some areas...and temperatures will be a few degrees above normal.  Winds will be south to southwest in the afternoons.

The one feature to watch is the subtropical moisture that has been moving northward.   Today through Wednesday there will be afternoon cumulus over the mountains.  Tuesday and Wednesday there is a chance of isolated afternoon and evening thunderstorms over the higher elevations north and east of the valley.

Long range models show the high pressure ridge holding through the first week of September.  They continue to show a shift to a fall like pattern in mid September.

The Old Forecaster

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Saturday, August 11, 2018

Weather Discussion for Saturday August 11, 2018

Normal high and low temperatures for Aug 6-Aug 13  (high/low) Redding 99/65, Chico 96/59, Quincy 90/43, Chester 86/45, Susanville 89/50, Grass Valley 89/56, Weaverville 95/49, Mt. Shasta 86/50, Yreka 92/52, Alturas 89/42

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 that had been stationary to our west is now moving through the Pacific Northwest.  The man affect this system will have on our area is some afternoon cumulus over the mountains and gusty southwest to northwest winds in the afternoon.  Temperatures today will continue slightly above normal.

Once the low moves east high pressure will be back in place over the western U.S. (see map below).  Sunday and Monday will be mostly sunny (smoky) with slightly above normal temperatures and light winds.   Tuesday and Wednesday it looks like some subtropical moisture will get pulled northward over our area.  Tuesday there is a chance of afternoon and evening thunderstorms over the Sierras from Mt Lassen southward.  Wednesday the thunderstorm threat will be over the higher elevations of all of Northern California.  

Thursday through next weekend we return to clear skies with above normal temperatures and light winds.

The Old Forecaster

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Wednesday, August 8, 2018

Weather Discussion for Wednesday August 8, 2018

Normal high and low temperatures for Aug 6-Aug 13  (high/low) Redding 99/65, Chico 96/59, Quincy 90/43, Chester 86/45, Susanville 89/50, Grass Valley 89/56, Weaverville 95/49, Mt. Shasta 86/50, Yreka 92/52, Alturas 89/42

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.

Smoke will continue to be a problem in may areas.  The smoke may improve somewhat Friday and Saturday afternoons. 

High pressure continues over the west.  The low pressure area to our west over the Pacific continues stationary. The low will start moving northeastward later today and will pass through the Pacific Northwest and western Canada late Friday and Saturday (see map below).  Temperatures today and Thursday will be about like yesterday or a little warmer.  Friday through the weekend we will see few degrees of cooling.  Light to moderate south winds are expect in the afternoon and evening today and Thursday with gusty southwest to northwest winds Friday.  

Next week we will be back under the high pressure ridge for above normal temperatures and relatively light winds.  One thing to watch is moisture from one of the hurricane getting pulled northward late in the week.

The Old Forecaster

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Monday, August 6, 2018

Weather Discussion for Monday August 6, 2018

Normal high and low temperatures for Aug 6-Aug 13  (high/low) Redding 99/65, Chico 96/59, Quincy 90/43, Chester 86/45, Susanville 89/50, Grass Valley 89/56, Weaverville 95/49, Mt. Shasta 86/50, Yreka 92/52, Alturas 89/42

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 out in the Pacific is now stationary as high pressure rebuilds over the western U.S.   Today we will have sunny or smoky skies with temperatures near or a little above normal.  Winds will be light.  Tuesday through Thursday we will continue sunny and smoky but temperatures will be 4 to 8 degrees above normal.  Winds will continue light.

Friday and Saturday the low will move east northeastward...moving through the Pacific Northwest (see map below).   This will weaken the high enough to allow our temperatures to drop back near normal.   The low will bring gusty south to southwest winds to our area Friday and Saturday afternoons.

Next week we will back under the high pressure ridge with normal or slightly above normal temperatures. 

The Old Forecaster

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Saturday, August 4, 2018

Weather Discussion for Saturday August 4, 2018

Normal high and low temperatures for July 30-Aug 6  (high/low) Redding 99/65, Chico 96/59, Quincy 90/43, Chester 86/45, Susanville 89/50, Grass Valley 89/57, Weaverville 95/49, Mt. Shasta 85/50, Yreka 92/53, Alturas 89/43

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.

Don't expect much improvement in the dense smoke for at least the next 3 of 4 days.  Fires are still active and winds will keep pushing it into the valley.

This morning's satellite picture (below) shows that low pressure trough is now in the Gulf of Alaska and off the west coast.  This has temporarily weakened the high pressure area that is still over the western U.S.  Today and Sunday we will see temperatures near or slightly below normal.  

Next week the high builds back over the west (see map below).   This means a return of daytime temperatures 4 to 8 degrees above normal.  Gusty southwest to northwest winds this afternoon and evening and lighter winds Sunday through next week. 

The Old Forecaster

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Wednesday, August 1, 2018

Weather Discussion for Wednesday August 1, 2018

Normal high and low temperatures for July 30-Aug 6  (high/low) Redding 99/65, Chico 96/59, Quincy 90/43, Chester 86/45, Susanville 89/50, Grass Valley 89/57, Weaverville 95/49, Mt. Shasta 85/50, Yreka 92/53, Alturas 89/43

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.

Yesterday's blog talked about the high pressure ridge weakening this weekend as a low pressure trough moved into western Canada.  The ridge is still going to weaken.  However, it now looks like the low won't go into Canada but will stall off the coast (see map below).

Today through Friday expect temperatures a little above normal and then cooling to a little below normal on the weekend. Dense smoke covers all of Northern California this morning and will probably persist into the weekend. Winds will be light nights and mornings and southwest to northwest in the afternoons.

Next week it looks like the off shore low will weaken and move north and the high pressure area will shift back over the west coast.  More heat....

The Old Forecaster

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