Monday, May 22, 2017

Weather Discussion for Monday May 22, 2017

Normal high and low temperatures for May 22-May 29 (high/low)...Redding 83/56, Chico 84/53, Quincy 75/40, Chester 71/38, Susanville 73/42, Grass Valley 74/48, Weaverville 79/42, Mt. Shasta 70/42, Yreka 76/43, Alturas 72/38

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 is over the west coast.   Today and Tuesday we will continue to see sunny skies with daytime temperatures warming to at or just above the 100 degree mark in the north end of the valley.  Late Tuesday and Wednesday a low pressure trough will move through Western Canadian and the Pacific Northwest with the southern end brushing the north end of California (see map below).  This system will bring cooler air and a few clouds to Northern California.  Isolated showers and thunderstorms are expected Wednesday afternoon over the higher elevations north of Redding.

Thursday and Friday we will have mostly clear skies.  Temperatures will continue to cool and will be near normal for this time of year by Friday.  Light to moderate north winds will occur in some areas.

High pressure will rebuild along the coast and this will bring warmer temperatures for the weekend. 

The Old Forecaster.

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Saturday, May 20, 2017

Weather Discussion for Saturday May 20, 2017

Normal high and low temperatures for May 15-May 22 (high/low)...Redding 81/54, Chico 82/52, Quincy 73/38, Chester 69/36, Susanville 71/39, Grass Valley 72/46, Weaverville 77/40, Mt. Shasta 69/41, Yreka 74/41, Alturas 69/35

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 is over the west coast and will hold there through early next week.  Today through Monday we will see sunny skies with some afternoon cumulus clouds over the mountains.  Temperatures will continue to warm and by Monday and Tuesday some areas of the north valley will be near or just above the 100 degree mark.  Winds will be light.  

The high pressure area will begin to weaken Tuesday afternoon and evening as a low pressure trough moves into western Canadian and the Pacific Northwest (see map below). This system will bring a few clouds the far north end of the state with isolated showers or thunderstorms over the higher elevations in the far north end of the state.  

Wednesday and Thursday we will return to mostly clear weather.  Temperature will be normal or a few degrees above normal and gusty north winds will occur in some areas. Warming starts Friday and continues through the weekend as high pressure rebuilds along the coast.   

The Old Forecaster.

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Wednesday, May 17, 2017

Weather Discussion for Wednesday May 17, 2017

Normal high and low temperatures for May 15-May 22 (high/low)...Redding 81/54, Chico 82/52, Quincy 73/38, Chester 69/36, Susanville 71/39, Grass Valley 72/46, Weaverville 77/40, Mt. Shasta 69/41, Yreka 74/41, Alturas 69/35

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.

Summertime weather pattern developing, so no much to write about.  High pressure is is building along the west coast and by the weekend and early next week a strong high pressure ridge will be over our area (see map below).   The next week we will see mostly clear skies.  Temperatures will warm and by the weekend will be 12 to 18 degrees above normal with the north valley in the upper 90s to near 100.  Light to moderate north winds will occur today and Thursday with light winds Friday through the weekend. 

The Old Forecaster.

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Monday, May 15, 2017

Weather Discussion for Monday May 15, 2017

Normal high and low temperatures for May 15-May 22 (high/low)...Redding 81/54, Chico 82/52, Quincy 73/38, Chester 69/36, Susanville 71/39, Grass Valley 72/46, Weaverville 77/40, Mt. Shasta 69/41, Yreka 74/41, Alturas 69/35

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 dropping southeastward along the Canadian coast.  This low will move across the Pacific Northwest and the north end of California Tuesday.   Clouds will increase later today and Tuesday will be cloudy to partly cloudy and cool with light rain or showers over the foothills and mountains with a chance of light showers in the valley north of Chico.  Skies will be clearing late Tuesday and early Wednesday as the low moves eastward and high pressure begins to establish itself along the west coast.

Wednesday through the weekend the high pressure ridge along and over the coast will continue to strengthen (see map below).   During this time we will see sunny skies and warmer temperatures.  Saturday and Sunday temperatures will be 12 to 18 degrees above normal, with the north valley in the upper 90s to near 100. 

The Old Forecaster.

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Saturday, May 13, 2017

Weather Discussion for Saturday May 13, 2017

Normal high and low temperatures for May 8-May 15 (high/low)...Redding 81/54, Chico 80/49, Quincy 73/37, Chester 68/34, Susanville 71/39, Grass Valley 71/45, Weaverville 76/39, Mt. Shasta 69/39, Yreka 74/40, Alturas 69/35

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 over western Canada.  This system is continuing to push cool air over Northern California.  Today and Sunday we will continue see below normal temperatures.   Cumulus clouds will form during the afternoon with a few showers expected over the higher elevations.  

Late Monday another low pressure area will drop southward along the Canadian and Pacific Northwest coasts. (see map below).   This system will move across the north state Tuesday.  All areas will see clouds and continued below normal temperatures.  Light rain or showers will occur over the foothills and mountains and in the valley north of Chico.  

Skies will be clearing late Tuesday and Wednesday as high pressure builds along the coast.  Wednesday through next weekend looks sunny with temperatures back above normal by Friday.  

The Old Forecaster.

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Wednesday, May 10, 2017

Weather Discussion for Wednesday May 10, 2017

Normal high and low temperatures for May 8-May 15 (high/low)...Redding 81/54, Chico 80/49, Quincy 73/37, Chester 68/34, Susanville 71/39, Grass Valley 71/45, Weaverville 76/39, Mt. Shasta 69/39, Yreka 74/40, Alturas 69/35

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 high pressure ridge that has been along and over the west coast is weakening and moving eastward.  A low pressure trough will be along the coast by later tonight and will move across the area Thursday and Friday. (see map below).  Today we will see a few clouds in the afternoon with cooler temperatures.  Thursday and Friday we will see partly cloudy to cloudy skies with light rain or showers over the higher elevations with a chance of showers in the north end of the valley.  

The trough will move east of our area late Friday and Saturday the north state will be partly to mostly sunny with temperatures back to near normal.  

Sunday and Monday another low pressure trough will be along the coast.  This looks like a stronger system and will bring light rain or showers to the areas north of a line from Clear Lake to Lake Tahoe.  This will also be colder system with light snow above 5500 to 6500 feet.  The trough will be east of our area by early Tuesday and skies will be clearing.   Wednesday should be sunny with normal temperatures. 

The Old Forecaster.

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Monday, May 8, 2017

Weather Discussion for Monday May 8, 2017

Normal high and low temperatures for May 8-May 15 (high/low)...Redding 81/54, Chico 80/49, Quincy 73/37, Chester 68/34, Susanville 71/39, Grass Valley 71/45, Weaverville 76/39, Mt. Shasta 69/39, Yreka 74/40, Alturas 69/35

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 good news is the gusty north winds will be ending later today.  High pressure continues along the coast and will hold there through Wednesday afternoon.  Temperatures will warm today and Tuesday and by Tuesday daytime temperatures will be 6 to 12 degrees above normal.

The high pressure ridge will begin to move eastward Wednesday as a low pressure trough approaches the coast.  Temperatures will cool and clouds will increase in the afternoon.

Thursday through the weekend a low pressure trough will be along and over the west coast (see map below).  Thursday a frontal system will move through the area with partly cloudy to cloudy skies.   There will be light rain over the foothills and mountains with a chance of showers in the north end of the valley.  Friday and Saturday there will be clouds and showers over the coastal and northern mountains.  The rest of the north state will be partly sunny to partly cloudy.  Sunday and Monday a stronger storm system will move through more rain and showers. 

The Old Forecaster.

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Saturday, May 6, 2017

Weather Discussion for Saturday May 6, 2017

Normal high and low temperatures for May 1-May 8 (high/low)...Redding 78/52, Chico 79/49, Quincy 70/36, Chester 66/34, Susanville 68/38, Grass Valley 68/44, Weaverville 73/38, Mt. Shasta 66/39, Yreka 70/38, Alturas 66/34

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 is along the California coast and continues to drop southward.   This system has brought cooler air and gusty north winds to Northern California.  Moisture is limited but showers and possible thunderstorms will occur today over the higher elevations.   Sunday the low will be over Southern California.   The gusty north winds will continue with afternoon showers and thunderstorms over the Sierras from Plumas county southward.  

Monday through Wednesday high pressure will be back over our area.   The north winds will end Monday afternoon.  Temperatures will warming and by Wednesday will be 5 to 10 degrees above normal.  

Late Wednesday the high pressure area will begin to shift eastward as a low pressure trough approaches the coast.(see map below).  Thursday through the weekend the trough will be close enough to the coast to send weak frontal systems across Northern California.   During this time the north state will be partly cloudy to cloudy with light rain and showers over the mountains and a chance of showers in the north end of the valley.

The Old Forecaster.

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Wednesday, May 3, 2017

Weather Discussion for Wednesday May 3, 2017

Normal high and low temperatures for May 1-May 8 (high/low)...Redding 78/52, Chico 79/49, Quincy 70/36, Chester 66/34, Susanville 68/38, Grass Valley 68/44, Weaverville 73/38, Mt. Shasta 66/39, Yreka 70/38, Alturas 66/34

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 still over the west coast but is beginning to move eastward.   Today we will have sunny skies with some afternoon clouds over the mountains.   Temperatures will be a little warmer than yesterday.  

A fairly significant change in the weather will begin Thursday as a low pressure trough deepens along the west coast. (see Map 1).   This trough will continue to stretch southward along the coast and by the weekend will split with a low pressure area over Southern California (see Map 2).   Thursday temperatures will begin to cool and there will be afternoon and evening thunderstorms over the mountains with a slight chance in the Redding area.  Friday and Saturday we will continue to see showers and thunderstorms over the foothills and mountains with a slight chance in the north end of the valley.   Sunday the low will be south or our area and the only chance of showers and thunderstorms will be over the Sierras from Mt Lassen southward.  

Monday and Tuesday sunny skies will return with normal or slightly above normal temperatures.   The models are in good agreement that a stronger low pressure trough will be along the coast by next Wednesday and this should make the end of next week cool and wet.
The Old Forecaster.

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Monday, May 1, 2017

Weather Discussion for Monday May 1, 2017

Normal high and low temperatures for May 1-May 8 (high/low)...Redding 78/52, Chico 79/49, Quincy 70/36, Chester 66/34, Susanville 68/38, Grass Valley 68/44, Weaverville 73/38, Mt. Shasta 66/39, Yreka 70/38, Alturas 66/34

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 week's weather will be the tale of two weather systems.   High pressure to start and low pressure at the end.

High pressure is along the west coast and will remain there through Wednesday.  During this time we will see sunny skies with temperatures 10 to 15 degrees above normal.   Wednesday will be the warmest day with some north valley areas in the low to mid 90s.   Light to moderate north winds will continue.

Thursday a cutoff or closed low will form off the Northern California coast.   This low will drop slowly southward and be along or over the Central and Southern California coast through the weekend (see map below).  The low will destabilize the atmosphere and trigger showers and thunderstorms.   Thursday and Friday the showers and thunderstorms will be over Northern California.  Most of the activity will be over the foothills and mountains with isolated activity in the valley.   Saturday and Sunday most of the shower activity will be over the southern half of the state with a few showers and thunderstorms over the higher elevations south of Mt Lassen.   Temperatures will cool and be back to normal or below by the weekend. 

The Old Forecaster.

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