Northern California Weather Blog

Wednesday, December 11, 2013

Weather Discussion for Wednesday December 11, 2013

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Normal high and low temperatures for this week Dec 9-Dec 14 (high/low)...Redding/Red Bluff 55/36, Chico 55/36, Quincy 47/25, Chester 41/21, Susanville 41/21, Grass Valley 52/32, Weaverville 47/29, Mt. Shasta 43/26, Yreka 44/25 and Alturas 44/18.

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The airmass over Northern California continues to slowly warm as the high pressure area edges nearer to the coast. Today will be mostly sunny with temperatures about like yesterday. Thursday a low pressure trough or frontal system will move over the high and into western Canada with the southern end brushing the north end of California. We will see a few clouds, and slightly cooler temperatures, from this system with isolated showers on the north coast.

Friday the high pressure area builds and moves closer to the west coast and by the weekend and early next week a strong high pressure ridge will be along and over the west coast.   The north state will have mostly sunny skies with daytime temperatures 10 to 15 degrees above normal.

It looks like late Tuesday and Wednesday the high pressure area will move back to the west.   This will allow more cold air from Alaska to drop into the western U.S.

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Weather Outlook for Redding, Shasta Lake City, Anderson, Cottonwood, and Red Bluff

Today: Sunny with some afternoon clouds. Max temps 55 to 59. South wind 8 to 15 mph.

Tonight: Scattered clouds. Min temps 29 to 33 wind sheltered areas and 33 to 36 westside thermal belt areas. Light wind.

Thursday: Partly cloudy. Max temps 52 to 57. South wind 6 to 14 mph.

Thursday Night: Scattered clouds. Min temps 33 to 40. Light wind.

Friday: Sunny with a few clouds. Max temps 55 to 59. North wind 10 to 18 mph.

Friday Night: Clear. Min temps 34 to 40. Light wind.

Saturday:   Sunny. Max temps 59 to 64. Light north wind.

Saturday Night: Scattered clouds. Min temps 36 to 41. Light wind.

Sunday: Sunny. Max temps 63 to 68. Light wind.

Sunday Night:  Clear. Min temps 37 to 42. Light wind.

Monday: Sunny. Max temps 64 to 69. Light wind.

Monday Night:  Clear. Min temps 37 to 43. Light wind.

Tuesday: Sunny with some afternoon clouds. Max temps 61 to 66. Light wind.

Tuesday Night: Clear. Min temps 38 to 45. Light wind.

The Old Forecaster

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Tuesday, December 10, 2013

Weather Discussion for Tuesday December 10, 2013

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Temperatures are slowly beginning to warm as the high pressure moves slowly toward the coast. Today and Wednesday will be mostly sunny with a few high clouds and daytime temperatures near normal. Nights will be still be cold in the wind sheltered valleys with the Northern Sacramento Valley still having some spots drop to the mid to upper 20s.

Thursday a very weak low pressure trough will brush the far north end. We will see a few clouds from this system and maybe some isolated showers on the north coast and near the Oregon Border.

Friday through next week high pressure will be along and over the west coast. We will have a return of mostly sunny skies with daytime temperatures 10 to 15 degrees above normal by Sunday.

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Weather Outlook for Redding, Shasta Lake City, Anderson, Cottonwood, and Red Bluff

Today: Sunny with a few clouds. Max temps 54 to 58. Light wind.

Tonight: Clear. Min temps 27 to 31 wind sheltered areas and 30 to 35 westside thermal belt areas. Light wind.

Wednesday: Sunny with some afternoon clouds. Max temps 53 to 57. South wind 8 to 15 mph.

Wednesday Night: Scattered clouds. Min temps 29 to 33 wind sheltered areas and 33 to 36 westside thermal belt areas. Light wind.

Thursday: Partly cloudy. Max temps 50 to 55. South wind 6 to 14 mph.

Thursday Night: Scattered clouds. Min temps 33 to 40. Light wind.

Friday: Sunny with a few clouds. Max temps 54 to 59. North wind 10 to 18 mph.

The Old Forecaster

Click on images below to enlarge them...

Monday, December 9, 2013

Weather Discussion for Monday December 9, 2013

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High pressure is slowly moving closer to the coast and this will push the jetstream eastward and cutoff the flow of cold arctic air into California. Last night north winds blew in many areas in the north valley and this helped keep the temperatures up. Redding airport is windy and 35 degrees this morning while Chico has calm winds and 28. The north winds will drop off today ...so tonight and Tuesday night will be cold in the sheltered valleys. The north state will be mostly clear with a few high clouds Tuesday afternoon. Daytime temperatures will warm to normal or slightly above by Tuesday.

Late Wednesday a weak low pressure trough and frontal system will be approaching the coast and will move across the area Thursday. This system will bring a few clouds to the north state with scattered showers on the north coast and near the Oregon border.

Friday through the weekend high pressure will be along the west coast. This will bring a return of sunny skies...above normal temperatures...and light to moderate north winds.

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Weather Outlook for Redding, Shasta Lake City, Anderson, Cottonwood, and Red Bluff

Today: Sunny. Max temps 47 to 51. North wind 10 to 20 mph.

Tonight: Clear. Min temps 25 to 30 wind sheltered areas and 28 to 32 westside thermal belt areas. Light wind.

Tuesday: Sunny with a few clouds in the afternoon. Max temps 54 to 58. Light wind.

Tuesday Night: Scattered clouds. Min temps 28 to 32 wind sheltered areas and 31 to 35 westside thermal belt areas. Light wind.

Wednesday: Sunny with some afternoon clouds. Max temps 53 to 57. South wind 8 to 15 mph.

Wednesday Night: Scattered clouds. Min temps 34 to 40. Light wind.

Thursday: Partly cloudy. Max temps 48 to 53. South wind 10 to 20 mph.

Thursday Night: Partly cloudy. Min temps 40 to 44. Light wind.

Friday: Sunny with a few clouds. Max temps 52 to 57. North wind 10 to 18 mph.

Friday Night: Clear. Min temps 38 to 45. Light wind.

Saturday: Sunny. Max temps 57 to 62. Light north wind.

Saturday Night: Scattered clouds. Min temps 40 to 48. Light wind.

Sunday: Sunny. Max temps 60 to 65. Light wind.

Sunday Night: Clear. Min temps 41 to 47. Light wind.

The Old Forecaster

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Sunday, December 8, 2013

Weather Discussion for Sunday December 8, 2013

Normal high and low temperatures for this week Dec 2-Dec 8 (high/low)...Redding/Red Bluff 57/38, Chico 58/37, Quincy 47/26, Chester 44/23, Susanville 45/25, Grass Valley 55/33, Weaverville 48/30, Mt. Shasta 45/27, Yreka 46/27 and Alturas 46/20.

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Normally when we have cold nights there is a low level temperature inversion which helps form thermal belts along the areas just above the valley floor. This is very evident in west Redding and above Oroville where citrus is grown. However, ever once in a while the arctic airmass gets pushed into California. This is called an advection freeze and hits areas usually protected by the thermal belts. This is one of those events. Fourteen years ago we moved from south of Redding to the 700 foot elevation on the west side. I knew this was in the thermal belt but it has been stronger than I expected. In the last 4 days we have had 2 of the coldest nights we have ever seen. Luckily we picked our avocadoes (16) last week...but we had lots of mandarins, oranges, grapefruit, and lemons still on the trees. Should find out how bad it is next week.

The high pressure area still is off the coast and is pushing cold air southward from Alaska into California. This system will begin to move slowly toward the coast and this will push the jetstream eastward. Northern California will be mostly clear through Wednesday with daytime temperature back to near normal by Tuesday. However, the clear skies and very dry airmass will allow the nighttime temperatures to drop and very cold nights are expected through Tuesday. Light to moderate north winds will occur in some areas today and Monday.

Thursday a weak low pressure trough will move through the area (see map below), This will bring clouds to the north state with light precipitation over the coastal and northern mountains. There will be a break between systems Friday and early Saturday and then another weak storm will brush the area Saturday afternoon and evening.

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Weather Outlook for Redding, Shasta Lake City, Anderson, Cottonwood, and Red Bluff

Today: Sunny. Max temps 40 to 45. North wind 8 to 18 mph.

Tonight: Clear. Min temps 24 to 29 wind sheltered areas and 27 to 32 elsewhere. North wind 8 to 15 mph.

Monday: Sunny. Max temps 47 to 52. North wind 10 to 20 mph.

Monday Night: A few clouds. Min temps 25 to 30 wind sheltered areas and 28 to 32 westside thermal belt areas. Light wind.

Tuesday: Sunny with a few clouds. Max temps 52 to 56. Light wind.

Tuesday Night: Scattered clouds. Min temps 28 to 32 wind sheltered areas and 29 to 33 westside thermal belt areas. Light wind.

Wednesday: Sunny with some afternoon clouds. Max temps 53 to 58. South wind 8 to 15 mph.

Wednesday Night: Scattered clouds. Min temps 34to 40. Light wind.

Thursday: Cloudy. Max temps 48 to 53. South wind 10 to 20 mph.

Thursday Night: Partly cloudy. Min temps 40 to 44. Light wind.

Friday: Sunny with a few clouds. Max temps 49 to 54. Light wind.

Friday Night: Clear. Min temps 38 to 45. Light wind.

Saturday: Becoming partly cloudy. Max temps 49 to 54. South wind 10 to 15 mph.

Saturday Night: Partly cloudy. Min temps 42 to 48. Light wind.

The Old Forecaster

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Saturday, December 7, 2013

Weather Discussion for Saturday December 7, 2013

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The cold low pressure area is now moving east of our area. This was a cold storm with snow levels below 500 feet.   There will be a few snow flurries this morning over the higher elevations...but clouds will decreasing during the day.  Tonight the north state will be clear with scattered clouds in some areas. The high pressure area is still off the coast and extends or ridges northward into Alaska. Cold air is still being funneled southward from Alaska into Northern California. The north winds will not be as strong today and tonight as forecast yesterday...this means more wind sheltered areas and more very cold temperatures tonight.

Sunday the high pressure area will begin to slowly move eastward. This will also push the jetstream eastward which will cutoff the flow of cold air into the north state.  Sunday through Wednesday will be mostly clear...however... a return to normal temperatures will take awhile with cold nights continuing Sunday and Monday.   Daytime temperatures will be back to normal by Tuesday and Wednesday. Light to moderate north wind will occur Sunday and Monday.

Clouds will begin to increase late Wednesday as weak low pressure trough approaches the coast (see map below). This system will move through our area Thursday with clouds and light precipitation over the coastal and northern mountains.   Skies will be clearing Friday as this weak storm moves eastward.

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Weather Outlook for Redding, Shasta Lake City, Anderson, Cottonwood, and Red Bluff

Today: Partly sunny with a few clouds. Max temps 41 to 45. North wind 6 to 12 mph.

Tonight: Clear. Min temps 24 to 29 wind sheltered areas and 29 to 33 elsewhere. Northwest wind 4 to 12 mph.

Sunday: Sunny. Max temps 44 to 49. North wind 12 to 22 mph.

Sunday Night: Clear. Min temps 25 to 30 wind sheltered areas and 29 to 33 elsewhere. North wind 8 to 15 mph.

Monday: Sunny with a few clouds. Max temps 47 to 52. North wind 10 to 20 mph.

Monday Night: A few clouds. Min temps 25 to 30 wind sheltered areas and 29 to 33 westside thermal belt areas. Light wind.

Tuesday: Sunny with a few clouds. Max temps 52 to 56. Light wind.

Tuesday Night: Scattered clouds. Min temps 30 to 38. Light wind.

Wednesday: Increasing clouds. Max temps 53 to 58. South wind 8 to 15 mph.

Wednesday Night: Partly cloudy. Min temps 39 to 46. Light wind.

Thursday: Cloudy. Max temps 47 to 52. South wind 10 to 20 mph.

Thursday Night: Cloudy. Min temps 40 to 44. Light wind.

Friday: Clearing. Max temps 49 to 54. Light wind.

Friday Night: Clear. Min temps 38 to 45. Light wind.

The Old Forecaster

Click on images below to enlarge them...

Friday, December 6, 2013

Weather Discussion for Friday November 6, 2013

***LOW SNOW LEVELS TODAY AND SATURDAY***

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7:15 pm update....Main part of storm now over Northern California... Snowing hard in Redding with snow level near Red Bluff.  Valley locations south of Red Bluff will see rain and snow mixed tonight...   Most of the valley precipitation will wind down by midnight with scattered showers until sunrise. Precipitation Saturday will mostly be over the foothills and mountains.
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The low pressure area that was along the Canadian coast yesterday has now moved offshore and will move over Northern California later today and Saturday.   Now that the low is over the water it is beginning to pickup moisture and the clouds associated with it are increasing. Precipitation from this system has already reached the north end of the state and will continue spreading slowly southward during the day...reaching the north valley by mid to late afternoon and Plumas and Nevada counties by evening. All of the north state will get light to moderate precipitation with this system. This is a very cold storm and snow levels in the north will be 300 to 500 feet and 500 to 1000 feet to the south in the Butte and Nevada county areas. Valley areas like Orland, Chico, Oroville, and Biggs will probably see some snow flakes mixed with the rain. As for snowfall amounts....Redding 1 to 2 inches with 2 to 5 inches in the Shasta Lake area. The foothills and mountains will see 8 to 15 inches of snow.   The snow will end in the valley by Saturday morning but snow flurries will continue over the foothills and mountains until sunset.   Wind sheltered areas will have another very cold night Saturday night.

Sunday the off shore high pressure area will move closer to the coast and this will push the jetstream...and it's cold air feed....eastward.   Monday through Wednesday the high will be along the coast (see map below). This means temperatures will start slowly warming Sunday and we should be back to near normal by Tuesday and Wednesday. Cold nights are expected again Sunday and Monday.   Sunday and Monday we will have gusty north winds.

Late Wednesday the high will weaken as a low pressure area approaches it.   This system will spread clouds over the area Wednesday night with precipitation spreading over the area late Wednesday and Thursday.

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Weather Outlook for Redding, Shasta Lake City, Anderson, Cottonwood, and Red Bluff

Today: Increasing clouds with snow this afternoon. Max temps 34 to 38. Light wind.

Tonight: Cloudy with snow turning to snow showers by midnight. Min temps 29 to 32. Light wind.

Saturday: Showers ending by sunrise then clearing.. Max temps 42 to 46. North wind 15 to 25 mph with higher gusts.

Saturday Night: Clear. Min temps 27 to 31 wind sheltered areas and 31 to 37 elsewhere. Northwest wind 12 to 22 mph.

Sunday: Sunny. Max temps 48 to 52. North wind 15 to 25 mph.

Sunday Night: Clear. Min temps 28 to 32 wind sheltered areas and 33 to 39 elsewhere. North wind 8 to 15 mph.

Monday: Sunny with a few clouds. Max temps 53 to 58. Light wind.

Monday Night: A few clouds. Min temps 31 to 39. Light wind.

Tuesday: Sunny with a few clouds. Max temps 55 to 59. Light wind.

Tuesday Night: Scattered clouds. Min temps 35 to 41. Light wind.

Wednesday: Increasing clouds. Max temps 53 to 58. South wind 8 to 15 mph.

Wednesday Night: Partly cloudy. Min temps 39 to 46. Light wind.

Thursday: Cloudy with rain. Max temps 44 to 49. South wind 10 to 20 mph.

Thursday Night: Cloudy with rain. Min temps 40 to 44. Light wind.

The Old Forecaster

Click on images below to enlarge them...

Thursday, December 5, 2013

Weather Discussion for Thursday December 5, 2013

***ANOTHER COLD NIGHT ESPECIALLY IN THE SACRAMENTO VALLEY***

***VERY LOW SNOW LEVELS FRIDAY***

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Update at 07:30 pm.. the Sacramento Valley will be colder tonight. Skies are clear and the winds are calm. Temperatures are already freezing in some valley areas. Expect some valley areas to be in the upper teens tonight with the rest of the valley in the low to mid 20s. This is what is called an advection freeze so the west side thermal belt areas of Redding will also be very cold. The one thing that could help is that clouds from the incoming storm have already reached the north end of the state and if they move over the valley they will help slow the temperature drop. Tomorrow's storm will move in as forecast this morning. Precipitation will reach the far north in the morning and should reach the valley by mid to late afternoon. Redding and Red Bluff will see snow and even Chico could see a few flakes. North Redding could see accumulations of 1-2 inches. The higher elevations will get 6 to 12 inches.
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This morning's satellite picture (below) shows the high pressure area is still off the coast and extends northward into Northern Alaska. The jetstream is dropping southward from Northern Alaska along the coast and into Southern California. This continues to push very cold air into the north state. Today will be sunny with temperatures about like yesterday. Cold again tonight especially in the north valley. Many areas of the north valley have had light to moderate north winds the last couple of nights. This helps keep the temperatures from dropping...this morning at 7:00am Redding is windy and 32 and Chico has calm winds and is 25 degrees. Tonight the winds will very light or calm throughout the valley and many areas will be in the low to mid 20s.

This morning's picture (below) also shows a low pressure area along the Canadian coast. This system doesn't have many clouds associated with it...however, it will move off shore today and then hook back inland across Northern California Friday. This over water trajectory will allow it to pickup moisture and it will bring cloudy skies to Northern California Friday and early Saturday with light precipitation. Snow levels will be 300 to 500 feet in the north and 1000 feet to the south in Butte and Nevada counties. Snow fall amounts will range from 1 to 2 inches in the Redding area to 6 to 12 inches over the higher elevations. The storm is east of our area by midday Saturday and skies will be clearing. Gusty north winds will move back over our area after the storm moves out. Wind sheltered areas will see another very cold night Saturday night.

Sunday through early next week the high pressure area will push closer to the coast and this will push the jetstream eastward...which will cutoff the flow of cold air into the north state. Sunday through Tuesday will be sunny with slowly warming temperatures. Wednesday we will see a few clouds from a storm moving by to our north.

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Weather Outlook for Redding, Shasta Lake City, Anderson, Cottonwood, and Red Bluff

Today: Sunny. Max temps 48 to 53. North wind 18 to 25 mph decreasing in the afternoon.

Tonight: Clear. Min temps 21 to 24 low lying areas and 25 to 27 west side. Light wind.

Friday: Cloudy with snow. Max temps 31 to 35. Light wind.

Friday Night: Cloudy with snow turning to snow showers by midnight. Min temps 30 to 32. Light wind.

Saturday: Showers ending by sunrise then clearing.. Max temps 43 to 481. North wind 15 to 25 mph with higher gusts.

Saturday Night: Clear. Min temps 27 to 31 wind sheltered areas and 31 to 37 elsewhere. Northwest wind 12 to 22 mph.

Sunday: Sunny. Max temps 48 to 52. North wind 15 to 25 mph.

Sunday Night: Clear. Min temps 28 to 32 wind sheltered areas and 33 to 39 elsewhere. North wind 8 to 15 mph.

Monday: Partly sunny with a few clouds. Max temps 53 to 58. Light wind.

Monday Night: A few clouds. Min temps 31 to 39. Light wind.

Tuesday: Sunny with a few clouds. Max temps 55 to 59. Light wind.

Tuesday Night: Scattered clouds. Min temps 35 to 41. Light wind.

Wednesday: Partly cloudy. Max temps 50 to 55. South wind 8 to 15 mph.

Wednesday Night: Partly cloudy. Min temps 39 to 46. Light wind.

The Old Forecaster

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Northern California Weather Blog

Wednesday, December 11, 2013

Weather Discussion for Wednesday December 11, 2013

Tuesday, December 10, 2013

Weather Discussion for Tuesday December 10, 2013

Monday, December 9, 2013

Weather Discussion for Monday December 9, 2013

Sunday, December 8, 2013

Weather Discussion for Sunday December 8, 2013

Saturday, December 7, 2013

Weather Discussion for Saturday December 7, 2013

Friday, December 6, 2013

Weather Discussion for Friday November 6, 2013

Thursday, December 5, 2013

Weather Discussion for Thursday December 5, 2013

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