Wednesday, June 20, 2018

Weather Discussion for Wednesday June 20, 2018

Normal high and low temperatures for June 18-June 25  (high/low) Redding 92/63, Chico 91/58, Quincy 83/42, Chester 80/42, Susanville 82/47, Grass Valley 82/53, Weaverville 87/45, Mt. Shasta 80/47, Yreka 84/48, Alturas 81/41

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.

High pressure is over the western U.S. and off the coast.   Today a weak frontal system is moving across the Pacific Northwest and western Canada.   The southern end of this system will bring few clouds to the far north end of the state and could trigger a few thunderstorms near the Oregon border.  The rest of the north state will be sunny with temperatures a little cooler.  South to southwest winds will increase this afternoon.

The high pressure ridge will strengthen over the next few days and dominate our weather for the next week (see map below).  Thursday through next week will be mostly clear and hot with temperatures 8 to 12 degrees above normal by the weekend. Looks like the first "hot spell" of the summer.  Winds will light except for gusty north winds Friday and early Saturday.

The Old Forecaster

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Monday, June 18, 2018

Weather Discussion for Monday June 18, 2018

Normal high and low temperatures for June 18-June 25  (high/low) Redding 92/63, Chico 91/58, Quincy 83/42, Chester 80/42, Susanville 82/47, Grass Valley 82/53, Weaverville 87/45, Mt. Shasta 80/47, Yreka 84/48, Alturas 81/41

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.

The low pressure area that moved across Northern California this weekend is now over Nevada and is moving eastward.  Today there will be a few clouds and isolated showers along and east of the Sierra Cascade Crest with mostly sunny skies elsewhere. 

Tuesday through at least the start of next week high pressure will be along and over the west coast (see map below).   During this time the inland areas of the north state will be mostly sunny with above normal temperatures and light winds.

The Old Forecaster

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Saturday, June 16, 2018

Weather Discussion for Saturday June 16, 2018

Normal high and low temperatures for June 11-June 18  (high/low) Redding 90/62, Chico 90/57, Quincy 81/42, Chester 78/41, Susanville 80/45, Grass Valley 80/51, Weaverville 84/44, Mt. Shasta 77/46, Yreka 81/46, Alturas 77/41

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.

The closed or cutoff low pressure area is forming over Oregon.  This low will drop southward across Northern California today and the move slowly eastward and will be over the Great Basin by Tuesday (see map below).  The satellite picture (below) shows the low doesn't have much moisture with it.  However, it will destabilize the atmosphere enough to trigger thunderstorms and showers as it moves through.   This afternoon and tonight there will be scattered showers and thunderstorms over Trinity, Siskiyou, higher elevations of Shasta, Modoc, Lassen, and Plumas counties, with a chance of one moving over the valley north of Red Bluff.  Sunday showers and thunderstorms will be confined to the areas north and east of Redding and Monday they will be along and east of the Sierra Cascade Crest.  Temperatures will be a few degrees below normal through Monday.  Gusty northwest to north winds will occur later today and Sunday.  

Tuesday through next weekend high pressure will be back along and over the coast.   The inland areas of the north state will be sunny with above normal temperatures. 

The Old Forecaster

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Wednesday, June 13, 2018

Weather Discussion for Wednesday June 13, 2018

Normal high and low temperatures for June 11-June 18  (high/low) Redding 90/62, Chico 90/57, Quincy 81/42, Chester 78/41, Susanville 80/45, Grass Valley 80/51, Weaverville 84/44, Mt. Shasta 77/46, Yreka 81/46, Alturas 77/41

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.

Ref comment yesterday about the WU showing some precip Friday.   Hope discussion below explains.

High pressure is along the west coast.  Today will be mostly sunny with temperatures slightly cooler than yesterday. The high pressure system is moving slowly westward as a "cutoff" or closed low pressure area forms over the Nevada.   The low will be in place by the weekend (see map below) and since it is cutoff from the jetstream will wobble around over Nevada through early next week. 

Thursday we will continue mostly sunny with cooler temperatures and light wind.  Friday there will be a some cumulus along and east of the Sierra Cascade Crest.   Saturday through Tuesday there will be afternoon and evening thunderstorms over Siskiyou, Modoc, Lassen, eastern Plumas, and eastern Nevada counties.  The rest of the north state will be partly to mostly sunny.  Temperatures will continue to cool and by the weekend they will be slightly below normal.  Gusty north winds will occur in some areas Saturday and Sunday.

As I noted before, forecasting the movement of these closed lows is hard since they are cutoff from the main flow.  It looks now like this low will wobble around Nevada Saturday through Tuesday.   After that it should begin to slowly moved northeastward....although one model run takes it westward over Northern California...stay tuned..

The Old Forecaster

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Monday, June 11, 2018

Weather Discussion for Monday June 11, 2018

Normal high and low temperatures for June 11-June 18  (high/low) Redding 90/62, Chico 90/57, Quincy 81/42, Chester 78/41, Susanville 80/45, Grass Valley 80/51, Weaverville 84/44, Mt. Shasta 77/46, Yreka 81/46, Alturas 77/41

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.

High pressure is building over the west coast and will hold there through midweek.  The inland areas of Northern California will be mostly sunny and temperatures will be near normal today and about 10 degrees above normal by Tuesday.  Light to moderate southwest to northwest winds will occur in the afternoons. 

Midweek the high will move a little westward as a low pressure trough develops over the Great Basin (see map below).  Wednesday through the weekend most of the north state will continue clear but there will be some afternoon cumulus clouds along and east of the Sierra Cascade Crest.  Temperatures will continue above normal.  There will be gusty north winds at times as the low develops. 

The Old Forecaster

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Saturday, June 9, 2018

Weather Discussion for Saturday June 9, 2018

Normal high and low temperatures for June 4-June 11  (high/low) Redding 88/60, Chico 88/56, Quincy 79/41, Chester 75/40, Susanville 78/45, Grass Valley 77/50, Weaverville 82/44, Mt. Shasta 73/44, Yreka 79/45, Alturas 75/40

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 trough is currently passing through the Pacific Northwest and the north end of California.  This system will bring a few light showers to north coast, Siskiyou, Northern Shasta, Modoc, and Lassen counties through this evening.  The trough will bring cooler temperatures and gusty southwest to northwest winds to all of the north state today.   

Sunday high pressure begins to rebuild over the west coast.   Skies will be mostly clear.  Temperatures will warm through Tuesday when temperatures will be 8 to 12 degrees above normal.  Winds will be light.   Wednesday through Friday the high will move back to the west as a low pressure trough develops over the Great Basin and the Central U.S. (see map below).  We will still have mostly clear skies but temperatures will cool back to near normal by Friday.   Gusty north winds will begin Friday.  

The weekend looks sunny and warmer with the gusty north winds ending by Sunday morning.

The Old Forecaster

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Wednesday, June 6, 2018

Weather Discussion for Wednesday June 6, 2018

Normal high and low temperatures for June 4-June 11  (high/low) Redding 88/60, Chico 88/56, Quincy 79/41, Chester 75/40, Susanville 78/45, Grass Valley 77/50, Weaverville 82/44, Mt. Shasta 73/44, Yreka 79/45, Alturas 75/40

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 now over the Central and Western U.S.   Low pressure troughs and frontal systems approach the coast and then are diverted northeastward into the Pacific Northwest.  Today through Friday we will see partly to mostly sunny skies with some afternoon clouds.   There will be a chance of afternoon and evening thunderstorms over Siskiyou, Modoc, and northern Lassen counties.  Temperatures will be near normal with light to moderate south to southwest winds in the afternoon.

Saturday a stronger and colder low pressure trough will move through (see map below).  This system will bring clouds and a few showers and thunderstorms from Redding northward.  Temperatures will be 10 to 20 degrees below normal.  Strong and gusty southwest to northwest winds are expected Saturday.

Sunday the trough will be east of our area and high pressure will be building over the west coast.  The high should hold through next week and during time we will see clear skies  and warmer temperatures.  The north valley should be back to the 100 degree mark by mid week. 

The Old Forecaster

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