Saturday, July 14, 2018

Weather Discussion for Saturday July 14, 2018



Normal high and low temperatures for July 9-July 16  (high/low) Redding 99/67, Chico 975/61, Quincy 89/44, Chester 85/46, Susanville 89/51, Grass Valley 87/56, Weaverville 94/51, Mt. Shasta 85/51, Yreka 92/53, Alturas 88/44

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.

Looking at the morning satellite picture and forecast weather map for next week (both below) you can see that not much change is expected in our large scale weather pattern.   The inland areas of Northern California will be sunny and hot with temperatures 5 to 10 degrees above normal.  We will have periodic surges of monsoonal or subtropical moisture move northward and these will trigger thunderstorms over the mountains.  One of these surges will trigger mountains thunderstorms today and Sunday with another batch of moisture expected move northward next Friday and Saturday.  There is a chance of a thunderstorm moving over the north end of the valley tomorrow (Sunday).  

The Old Forecaster

Click here for latest CalTrans Chain Control Information

Click on images below to enlarge them...



Wednesday, July 11, 2018

Weather Discussion for Wednesday July 11, 2018

***HOT***

Normal high and low temperatures for July 9-July 16  (high/low) Redding 99/67, Chico 975/61, Quincy 89/44, Chester 85/46, Susanville 89/51, Grass Valley 87/56, Weaverville 94/51, Mt. Shasta 85/51, Yreka 92/53, Alturas 88/44

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 strong high pressure ridge continues over the U.S. and will shift a little further west over to the next week (see map below).  This means the inland areas of Northern California will see temperatures 5 to 10 degrees above normal with light winds.  

The thing to watch is how far north the monsoonal moisture now over the Southwestern U.S. will be pulled northward by the southerly flow around the west side of the high pressure area.  At this time it looks like we will see a few clouds Thursday through Saturday with isolated mountain thunderstorms.  Sunday and Monday look sunny and then more mountain thunderstorms are possible Tuesday.
The Old Forecaster

Click here for latest CalTrans Chain Control Information

Click on images below to enlarge them...



Monday, July 9, 2018

Weather Discussion for Monday July 9, 2018

***HOTTER***

Normal high and low temperatures for July 9-July 16  (high/low) Redding 99/67, Chico 975/61, Quincy 89/44, Chester 85/46, Susanville 89/51, Grass Valley 87/56, Weaverville 94/51, Mt. Shasta 85/51, Yreka 92/53, Alturas 88/44

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.

This morning's satellite picture (below) shows a low pressure area off the coast.  This low will move into western Canada later today.  The large high pressure area that has dominated the U.S. weather will strengthen and move back toward the west (see map below).  This will bring hotter weather to the inland areas of Northern California.  Temperatures Tuesday through the weekend will be running 5 to 10 degrees above normal.  Winds will be light nights and mornings and southerly in the afternoon.

Thursday the flow around the westside of the high will begin to pull monsoonal or subtropical moisture northward.  There is a chance of isolated afternoon and evening thunderstorms over the mountains Thursday through the weekend.

The Old Forecaster

Click here for latest CalTrans Chain Control Information

Click on images below to enlarge them...




Saturday, July 7, 2018

Weather Discussion for Saturday July 7, 2018

Normal high and low temperatures for July 2-July 9  (high/low) Redding 98/65, Chico 95/60, Quincy 88/43, Chester 82/44, Susanville 87/49, Grass Valley 86/55, Weaverville 91/48, Mt. Shasta 84/49, Yreka 88/51, Alturas 85/43

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.

A large high pressure area is over the U.S. and will get stronger during the next week (see map below).  The inland areas of Northern California will be mostly clear with temperatures warming to 5 to 10 degrees above normal by midweek.  Winds will be light.  

Thursday through the weekend afternoon and evening thunderstorms are possible over the mountains as subtropical moisture is pulled northward around the westside of the high pressure area. 

The Old Forecaster

Click here for latest CalTrans Chain Control Information

Click on images below to enlarge them...




Wednesday, July 4, 2018

Weather Discussion for Wednesday July 4, 2018

Normal high and low temperatures for July 2-July 9  (high/low) Redding 98/65, Chico 95/60, Quincy 88/43, Chester 82/44, Susanville 87/49, Grass Valley 86/55, Weaverville 91/48, Mt. Shasta 84/49, Yreka 88/51, Alturas 85/43

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.

A cutoff low pressure area has formed off the coast and is currently stationary (see satellite picture below).   This low will slowly move northward Thursday and Friday.   The main effect this low will have on Northern California is to cool temperatures to a few degrees below normal today through Friday.   We will see a few clouds from the system as it lifts northward late Thursday and Friday and there could be isolated thunderstorms over the mountains north and east of the valley.  Gusty south winds will occur this afternoon and Thursday and Friday afternoons.  

Saturday the large high pressure area that is over the U.S. will build back to the west and cover the entire U.S. (see map below).  This will bring a return of hot weather to the north state.  Saturday through at least the mid part of next week the inland areas of the north state will be sunny with above normal temperatures. 

The Old Forecaster

Click here for latest CalTrans Chain Control Information

Click on images below to enlarge them...



Monday, July 2, 2018

Weather Discussion for Monday July 2, 2018

Normal high and low temperatures for July 2-July 9  (high/low) Redding 98/65, Chico 95/60, Quincy 88/43, Chester 82/44, Susanville 87/49, Grass Valley 86/55, Weaverville 91/48, Mt. Shasta 84/49, Yreka 88/51, Alturas 85/43

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.

High pressure is to our east over the Central U.S. and off the coast.  Today the inland areas of Northern California will be sunny with slightly cooler temperatures.  Tuesday a closed or cutoff low pressure area will form off the coast and will remain there until it lifts northeastward late Thursday and Friday (see map below).   The low will cool temperatures back to near normal by midweek.  It could also trigger isolated afternoon and and evening thunderstorms Thursday and Friday along and east of the Sierra Cascade Crest.

When the low moves northeastward the high pressure area over the Central U.S. will push back to the west.  This will warm temperatures back to above normal this weekend and early next week. 

The Old Forecaster

Click here for latest CalTrans Chain Control Information

Click on images below to enlarge them...