Marine Weather and Tide Forecast for Mammoth Lakes, CA
March 19, 2024 5:27 AM PDT (12:27 UTC) Change Location
Sunrise 7:00 AM Sunset 7:11 PM Moonrise 1:57 PM Moonset 4:29 AM |
Area Discussion for - San Joaquin Valley/Hanford, CA
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FXUS66 KHNX 190827 AFDHNX
Area Forecast Discussion National Weather Service Hanford CA 127 AM PDT Tue Mar 19 2024
KEY MESSAGES
1. There is a 30 to 40 percent probability of high temperatures reaching at least 80 degrees this afternoon in Fresno, Hanford, and Lemoore.
2. Cooling trend begins Wednesday.
3. Rain and high elevation snow returns this weekend as a result of the next trough.
DISCUSSION
There is a potential of spotty showers in the Sierra Nevada and Kern County today due to the current rex block setup with a spinning trough over portions of Southern California, Southwest Arizona, and Mexico and a very strong ridge over the Pacific Northwest. This setup has led to our temperatures to warm up the past few days. This afternoon we have a 30 to 40 percent probability of high temperatures at or above 80 for Fresno, Lemoore, and Hanford. There also is a 75 to 100 percent probability of high temperatures above 75 for the entire San Joaquin Valley this afternoon.
However, these very warm temperatures are not going to last long as model ensembles show the rex block weakening on Wednesday as the trough moves east towards Texas and the ridge weakens and slides down in the Great Basin. The ridge will persist over the Great Basin through Friday, while cooler temperatures will prevail in the San Joaquin Valley due to an onshore flow that will develop.
Model ensembles are in agreement that a trough moves in late Friday night into early Saturday morning. This trough brings a potential of rain to the San Joaquin Valley and snow to the Sierra Nevada above 6,000 feet through the weekend. There is a 20 to 40 percent probability of a tenth of an inch of rain or more for the San Joaquin Valley between Saturday morning and Sunday morning. There is a 40 percent chance of at least 4 inches of snow above 6,000 feet currently from this trough.
AVIATION
There is a potential for spotty showers over the Sierra Nevada and Kern County, otherwise, VFR conditions will prevail for the next 24 hours.
AIR QUALITY ISSUES
None.
CERTAINTY
The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is medium.
Certainty levels include low
medium
and high. Please visit www.weather.gov/hnx/certainty.html for additional information and/or to provide feedback.
HNX WATCHES/WARNINGS/ADVISORIES
None.
Area Forecast Discussion National Weather Service Hanford CA 127 AM PDT Tue Mar 19 2024
KEY MESSAGES
1. There is a 30 to 40 percent probability of high temperatures reaching at least 80 degrees this afternoon in Fresno, Hanford, and Lemoore.
2. Cooling trend begins Wednesday.
3. Rain and high elevation snow returns this weekend as a result of the next trough.
DISCUSSION
There is a potential of spotty showers in the Sierra Nevada and Kern County today due to the current rex block setup with a spinning trough over portions of Southern California, Southwest Arizona, and Mexico and a very strong ridge over the Pacific Northwest. This setup has led to our temperatures to warm up the past few days. This afternoon we have a 30 to 40 percent probability of high temperatures at or above 80 for Fresno, Lemoore, and Hanford. There also is a 75 to 100 percent probability of high temperatures above 75 for the entire San Joaquin Valley this afternoon.
However, these very warm temperatures are not going to last long as model ensembles show the rex block weakening on Wednesday as the trough moves east towards Texas and the ridge weakens and slides down in the Great Basin. The ridge will persist over the Great Basin through Friday, while cooler temperatures will prevail in the San Joaquin Valley due to an onshore flow that will develop.
Model ensembles are in agreement that a trough moves in late Friday night into early Saturday morning. This trough brings a potential of rain to the San Joaquin Valley and snow to the Sierra Nevada above 6,000 feet through the weekend. There is a 20 to 40 percent probability of a tenth of an inch of rain or more for the San Joaquin Valley between Saturday morning and Sunday morning. There is a 40 percent chance of at least 4 inches of snow above 6,000 feet currently from this trough.
AVIATION
There is a potential for spotty showers over the Sierra Nevada and Kern County, otherwise, VFR conditions will prevail for the next 24 hours.
AIR QUALITY ISSUES
None.
CERTAINTY
The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is medium.
Certainty levels include low
medium
and high. Please visit www.weather.gov/hnx/certainty.html for additional information and/or to provide feedback.
HNX WATCHES/WARNINGS/ADVISORIES
None.
Airport Reports
EDIT (hide/show)  Help Click EDIT to display multiple airports. Follow links for more data.Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
KMMH MAMMOTH YOSEMITE,CA | 9 sm | 12 min | calm | 10 sm | Clear | 28°F | 21°F | 74% | 30.21 |
San Joaquin Valley, CA,
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