FORECAST FOR THE OWENS VALLEY, MAMMOTH AND MONO COUNTY
PROVIDED BY DENNIS MATTINSON
EASTERN SIERRA WEATHER FORECASTER
KSRW 92.5 / 96.5 FM AND TV-33
WEDNESDAY, 21-JAN-09, 7:04
A SPLITTING UPPER TROUGH OFF THE WEST COAST IS MOVING INLAND. IT WILL SPREAD LIGHT MOISTURE OVER OUR AREA LATER TODAY AND INTO TONIGHT WITH THE MAIN MOISTURE CONTINUING INTO THURSDAY. SNOW LEVELS REMAIN AT ABOUT 7,500 TO 8,000 FEET OR HIGHER WITH ONLY LIGHT ACCUMULATIONS EXPECTED. RESIDUAL PRECIPITATION SHOULD CONTINUE INTO FRIDAY. TEMPERATURES WILL COOL DOWN A BIT ON THURSDAY AND FRIDAY. FOR THE WEEKEND, WE WILL SEE COOLER TEMPERATURES WITH UNSETTLED WEATHER. AND RIGHT NOW, IT LOOKS LIKE A COLD CANADIAN SYSTEM MOVES IN LATE SUNDAY INTO MONDAY WITH THE CHANCE ON MORE SIGNIFICANT PRECIPITATION CONTINUING INTO THE FIRST PART OF NEXT WEEK. STAY TUNED FOR UPDATES.
FOR THE OWENS VALLEY:
TODAY: PARTLY TO MOSTLY CLOUDY SKIES WITH HIGHS NEAR 60. 20% CHANCE OF RAIN. SOUTHEAST WIND 5 MPH.
TONIGHT: CLOUDY SKIES WITH A 30% CHANCE OF RAIN. LOWS AROUND 30. CALM WIND.
THURSDAY: MOSTLY CLOUDY WITH A 40% CHANCE OF RAIN. HIGHS AROUND 57. SOUTHEAST WIND 5 MPH.
THURSDAY NIGHT: MOSTLY CLOUDY WITH A 30% CHANCE OF RAIN. EVENING LOWS NEAR 33. SOUTHEAST WIND LIGHT.
FOR MAMMOTH LAKES:
TODAY: MOSTLY CLOUDY SKIES WITH HIGHS AROUND 43. 50% CHANCE OF SCATTERED SNOW. CALM WIND.
TONIGHT: MOSTLY CLOUDY SKIES WITH SNOW SHOWERS LIKELY. LOWS AROUND 34. SOUTHEAST WIND 5 MPH.
THURSDAY: CLOUDY WITH A 80% CHANCE OF SNOW SHOWERS. HIGHS NEAR 38. SOUTHWEST WIND 5 - 10 MPH.
THURSDAY NIGHT: CLOUDY WITH A 30% CHANCE OF SNOW SHOWERS. EVENING LOWS NEAR 29. CALM WIND.
FOR THE REST OF MONO COUNTY:
TODAY: CLOUDY WITH ISOLATED SHOWERS POSSIBLE. HIGHS 40 - 50. SOUTH WIND 10 MPH.
TONIGHT: CLOUDY WITH SCATTERED SHOWERS, BECOMING NUMEROUS LATE IN THE EVENING. LOWS 24 - 34. SOUTH WIND 10 MPH WITH RIDGE GUSTS TO 65 MPH.
THURSDAY: CLOUDY WITH RAIN AND SNOW. 70% CHANCE OF PRECIPITATION. HIGHS 38 - 48. SOUTHWEST WIND 5 - 10 MPH.
THURSDAY NIGHT: CLOUDY WITH A CHANCE OF RAIN AND SNOW. CHANCE OF PRECIPITATION 40%. LOWS 20 - 30. SOUTH WIND 10 MPH.
NOTE: DENNIS' FORECAST ORIGINATES FROM THE FORT INDEPENDENCE EPA METEOROLOGICAL STATION. BECAUSE WEATHER CONDITIONS VARY GREATLY FROM LOCATION TO LOCATION IN THE EASTERN SIERRA, THIS FORECAST IS SUBJECT TO CHANGE WITHOUT NOTICE.
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Kings River Basin forecast (west side of the Sierra) from an email I received today:
A moderately strong trough continues to move towards the California coast line today. Mid level moisture is excellent across the central California coast into central California while low level moisture is still further off the coast. The trough will continue to make its way inland later today and tonight. Light showers will be the case as good moisture continues to advect into the area. The trough will slowly move into the area later today and tonight and the trough axis will move through the area early tomorrow morning. Showers will pick up in coverage and intensity later today as the main dynamics associated with the trough are closer to the area. The dynamics with this storm are not all too impressive so for the most part, will see a steady light rain overnight. By tomorrow, expect showers to continue across the area tapering off by midday. This trough is somewhat tropical in origin so temperatures throughout the event will likely not change much. Snow levels could be as high as 9,000 feet at times.
Expect increasing clouds throughout the day as the first weather system to affect the area in over two weeks continues to move into central California. The area will see sprinkles during the morning and afternoon hours with heavier precipitation beginning later this afternoon into the evening. The bulk of the precipitation will occur overnight and into tomorrow morning. Temperatures will be a bit cooler than they have been due to increase cloud cover. Expect by midday tomorrow rainfall to be mostly light across the area. Expect gradual clearing by the evening.
As the current storm system exits the state late Thursday, ridging will build in shortly for Friday. However, some areas, especially the mountains, will see lingering showers Friday into Saturday. The next system forecasted to move through the area will move into the area Monday as it moves out of southern Canada on Sunday. Computer models are hinting that this will be a much colder storm and precipitation will be sufficient with it to produce good precipitation amounts. However, don't want to talk too much about a "big" storm since the models have been somewhat inconsistent. By late Monday, high pressure builds in once again, leaving the area dry but in a much colder airmass. This will bring and end to the very warm temperatures the valley has experienced the last couple of weeks.
Kings River Project Meteorologist
North American Weather Consultants, Inc.
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