Wednesday, May 12, 2021

Weather Discussion for Wednesday May 12, 2021

 Normal high/ low temperatures for May 10-May 17 (high/low) Redding 81/54, Chico 80/51, Quincy 72/38, Chester 67/35, Susanville 70/39, Grass Valley 71/46, Weaverville 76/39, Mt. Shasta 67/40, Yreka 73/41, Alturas 67/33


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 continues along the coast.  Sunny today and Thursday with daytime temperatures 10 to 15 degrees above normal.  Winds will be light.  

In the last blog I said a low pressure trough would pass through Western Canada and the Pacific Northwest Friday and Saturday.   The trough will still reach the Pacific Northwest Friday.  However, it now looks like the southern end of this trough will cutoff from the jetstream and drop southward over California, ending up over Central California by Saturday (see map below).   The low will trigger a few afternoon and evening thunderstorms over the foothills and mountains Friday and Saturday.  There is a slight chance of a thunderstorm in the north end of the valley.  Temperatures will cool but still be above normal.  Moderate north winds will occur in some areas Saturday.  Sunday the low will be moving eastward but still could trigger afternoon thunderstorms over the Sierras.  

Monday through the mid part of next week another low pressure trough will move through Western Canada and the Pacific Northwest.  While this one isn't expected to split and our area should stay dry, it will keep the high pressure ridge from pushing northward.  Look for sunny skies with a few high clouds.  Temperatures will be a few degrees above normal.

The Old Forecaster
  
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Monday, May 10, 2021

Weather Discussion for Monday May 10, 2021

Normal high/ low temperatures for May 10-May 17 (high/low) Redding 81/54, Chico 80/51, Quincy 72/38, Chester 67/35, Susanville 70/39, Grass Valley 71/46, Weaverville 76/39, Mt. Shasta 67/40, Yreka 73/41, Alturas 67/33


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 question for the comments...The wave length of the large scale features in the atmosphere is usually about the width of the U.S. Therefore many times when there is a strong high pressure ridge over the west there will be a trough or cooler weather in the east.  In the summer the large scale flow shifts northward.

High pressure will continue to dominate our weather for at least the next week and probably longer.   The high pressure ridge is currently building over the west coast.  This will keep skies mostly clear and daytime temperatures will warm to 10 to 15 degrees above normal Tuesday through Thursday.  The gusty north winds will continue through midday Tuesday.  

The high will move back just off the coast Friday through the weekend as a low pressure area drops southeastward across Western Canada and the Pacific Northwest (see map below).  The only affect this system will have on the north state is to cool temperatures to just a few degrees above normal and bring more gusty north winds into the area starting late Saturday and Sunday.  

The Old Forecaster
  
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Saturday, May 8, 2021

Weather Discussion for Saturday May 8, 2021

Normal high/ low temperatures for May 3-May 10 (high/low) Redding 79/53, Chico 79/49, Quincy 70/37, Chester 65/33, Susanville 68/38, Grass Valley 68/44, Weaverville 74/39, Mt. Shasta 66/38, Yreka 70/39, Alturas 65/33


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 high pressure ridge will continue over the western U.S. and off the west coast.   The high will get stronger through midweek and the slowly weaken (see map below).  The next week looks like clear skies,  daytime temperatures will warm through Wednesday and then cool a little next weekend. Temperatures Tuesday and Wednesday will be 8 to 12 degrees above normal.  Gusty north to northeast winds will continue through Tuesday.

The Old Forecaster
  
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Wednesday, May 5, 2021

Weather Discussion for Wednesday May 5, 2021

 Normal high/ low temperatures for May 3-May 10 (high/low) Redding 79/53, Chico 79/49, Quincy 70/37, Chester 65/33, Susanville 68/38, Grass Valley 68/44, Weaverville 74/39, Mt. Shasta 66/38, Yreka 70/39, Alturas 65/33


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 question yesterday about why so many high pressure ridges.  Several theories but no conclusions.  

Sunny today with temperatures a little warmer than yesterday.  North winds will be ending this morning.

Thursday and early Friday a low pressure trough will pass through Western Canada and the Pacific Northwest.  This system "dry" and will bring just a few high clouds to the north state.  Temperatures Thursday and Friday will cool back to near normal.  Gusty southwest to northwest winds will occur Thursday and gusty north winds Friday.  

Saturday through at least the mid part of next week we will return to a weak high pressure ridge along and off the coast (see map below).  Sunny skies with above normal temperatures.   Unfortunately....gusty north to northeast winds Sunday through Tuesday.   

The Old Forecaster
  
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Monday, May 3, 2021

Weather Discussion for Monday May 2, 2021

Normal high/ low temperatures for May 3-May 10 (high/low) Redding 79/53, Chico 79/49, Quincy 70/37, Chester 65/33, Susanville 68/38, Grass Valley 68/44, Weaverville 74/39, Mt. Shasta 66/38, Yreka 70/39, Alturas 65/33


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 continues blocking any weather systems from reaching our area.   Today through Wednesday will be sunny with temperatures above normal.  Gusty north winds will occur today and Tuesday.  

Thursday and early Friday a low pressure trough will pass through Western Canada and the Pacific Northwest (see map below).  This system will be relatively dry but could trigger some mountains showers over the areas north of Redding.  Temperatures will cool to near normal Thursday and Friday.  Gusty southwest to northwest winds are expected.

Saturday through early next week high pressure will be back over the west.  Look for a return of clear skies and above normal temperatures.  Gusty north winds will occur Saturday and Sunday.

The Old Forecaster
  
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Saturday, May 1, 2021

Weather Discussion for Saturday May 1, 2021

 Normal high/ low temperatures for April 26-May 3 (high/low) Redding 77/50, Chico 76/48, Quincy 68/34, Chester 62/31, Susanville 65/35, Grass Valley 66/42, Weaverville 71/36, Mt. Shasta 64/36, Yreka 68/36, Alturas 63/31


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 and frontal system will pass through Western Canada and the Pacific Northwest later today and early Sunday.  This system will bring a few clouds to our area and there could be a light showers near the Oregon Border.  Skies will be clear Sunday.  Temperatures today and Sunday will be a little cooler but still above normal.  Gusty north winds will move into the area this evening and continue through Sunday.

Monday through Wednesday high pressure will be back over the west coast.  Skies will be sunny and daytime temperatures will be 5 to 10 degrees above normal.  Winds will be light.

Thursday afternoon and Friday another low pressure area will pass through the Pacific Northwest (see map below).  This system will bring some clouds to the area with a few showers mainly over the mountains.  Temperatures will cool to slightly below normal by Friday.  Locally gusty south winds will precede this system. 

Saturday through Monday high pressure is back over the west and we will see more sunny skies....above normal temperatures and gusty north winds. 

The Old Forecaster
  
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Wednesday, April 28, 2021

Weather Discussion for Wednesday April 28, 2021

 Normal high/ low temperatures for April 26-May 3 (high/low) Redding 77/50, Chico 76/48, Quincy 68/34, Chester 62/31, Susanville 65/35, Grass Valley 66/42, Weaverville 71/36, Mt. Shasta 64/36, Yreka 68/36, Alturas 63/31


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 in yesterdays comments...The last 2 year period is the second driest in the past 100 years.  The only drier was 1976-1977, and those of us that were around here remember that.  Any rain now won't help much.  In 1977 we had a wet May and still had a bad fire season and water shortages.  Not sure what the long...long...term weather will be but we should be prepared for a new normal.  From what little I have read I think we will find that the changes in the Arctic ice are more of an influence than we realize.  

The strong high pressure ridge will continue over the west coast through midday Saturday.  Skies will be mostly sunny with a few mid and high clouds at times.  Temperatures will be 12 to 18 degrees above normal and winds will be light.

Last Saturday and Sunday the high pressure ridge will be weakened (see map below) as a low pressure trough rides over it and across Canada and the Pacific Northwest.  Look for a few mid and high clouds Sunday and them mostly sunny through at least the middle of next week.  Gusty north winds will occur late Sunday through midday Wednesday.

There is some indication in the longer range models of a chance of rain late next week.

The Old Forecaster
  
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