Marine Weather and Tide Forecast for Squaw Valley, CA
September 7, 2024 10:52 PM PDT (05:52 UTC) Change Location
 | Sunrise 6:32 AM Sunset 7:17 PM Moonrise 10:49 AM Moonset 9:21 PM |
Area Discussion for - San Joaquin Valley/Hanford, CA
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FXUS66 KHNX 072157 AFDHNX
Area Forecast Discussion National Weather Service Hanford CA 257 PM PDT Sat Sep 7 2024
KEY MESSAGES
1. There is a 20 to 65 percent probability of high temperatures at or above 105 degrees today across much of the lower elevations before a gradual cooling trend begins on Sunday.
2. Low daytime humidity and poor overnight recovery will provide for an elevated risk of grass fires in eastern Kern County and over the West Side Hills through early next week.
3. There is a 10 to 15 percent chance for isolated thunderstorms over the high elevations of the Sierra Nevada this afternoon and early evening.
DISCUSSION
The upper ridge has shifted further southeast now stretching from southern California to the Four Corners region. High temperatures this afternoon will once again climb to around 10 to 12 degrees above climatological normals for this time of the year. Moderate to major Heat Risk continues across much of the lower elevations.
A Heat Advisory for the San Joaquin Valley and adjacent foothills and an Excessive Heat Warning for the Kern County deserts remains in effect through 8PM this evening. Probability of Exceedance for a high temperature of 105 degrees in the San Joaquin Valley today is up to around 35 percent in Fresno and Hanford. Slight synoptic cooling will occur the next couple of days with probabilities of exceedance for 105 degrees in the SJ Valley falling to 15 percent or less while the PoE for 100 degrees is generally from 75 to 95 percent. An upper trough over the Gulf of Alaska dives southeast to off the Pacific Northwest coast on Tuesday then over northern California on Wednesday and the northern Great Basin on Thursday.
More significant cooling will occur from this trough with highs forecast to be near normal by Wednesday and a little below normal on Thursday. PoE for 100 degrees in the SJV falls to around 10 to 50 percent on Tuesday and then near 0 percent on Wednesday. PoE for 90 degrees is 45 to 85 percent on Wednesday then only 20 to 35 percent on Thursday. Good cluster agreement with the trough lifting northeast over the Rockies on Friday. Upper heights will moderate over California into Saturday for a modest warming trend back to near normal.
Satellite loops showed lots of mid level clouds across the area this morning and that moisture will provide up to a 20 percent chance for some isolated thunderstorms over the higher Sierra this afternoon and early evening. Hi resolution guidance focuses on the Sierra crest in Tulare County for convection. Lingering moisture on Sunday will still provide around a 10 percent chance for isolated afternoon thunderstorms along the crest. Southwest flow aloft is expected to bring in some drier air on Monday and put an end to the thunderstorm threat.
AVIATION
Areas of MVFR and local IFR visibilities near wildfires.
Otherwise, VFR conditions will prevail across the central CA interior over 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
Excessive Heat Warning until 8 PM PDT this evening for CAZ337>339.
Heat Advisory until 8 PM PDT this evening for CAZ300>317-319- 321-332.
Area Forecast Discussion National Weather Service Hanford CA 257 PM PDT Sat Sep 7 2024
KEY MESSAGES
1. There is a 20 to 65 percent probability of high temperatures at or above 105 degrees today across much of the lower elevations before a gradual cooling trend begins on Sunday.
2. Low daytime humidity and poor overnight recovery will provide for an elevated risk of grass fires in eastern Kern County and over the West Side Hills through early next week.
3. There is a 10 to 15 percent chance for isolated thunderstorms over the high elevations of the Sierra Nevada this afternoon and early evening.
DISCUSSION
The upper ridge has shifted further southeast now stretching from southern California to the Four Corners region. High temperatures this afternoon will once again climb to around 10 to 12 degrees above climatological normals for this time of the year. Moderate to major Heat Risk continues across much of the lower elevations.
A Heat Advisory for the San Joaquin Valley and adjacent foothills and an Excessive Heat Warning for the Kern County deserts remains in effect through 8PM this evening. Probability of Exceedance for a high temperature of 105 degrees in the San Joaquin Valley today is up to around 35 percent in Fresno and Hanford. Slight synoptic cooling will occur the next couple of days with probabilities of exceedance for 105 degrees in the SJ Valley falling to 15 percent or less while the PoE for 100 degrees is generally from 75 to 95 percent. An upper trough over the Gulf of Alaska dives southeast to off the Pacific Northwest coast on Tuesday then over northern California on Wednesday and the northern Great Basin on Thursday.
More significant cooling will occur from this trough with highs forecast to be near normal by Wednesday and a little below normal on Thursday. PoE for 100 degrees in the SJV falls to around 10 to 50 percent on Tuesday and then near 0 percent on Wednesday. PoE for 90 degrees is 45 to 85 percent on Wednesday then only 20 to 35 percent on Thursday. Good cluster agreement with the trough lifting northeast over the Rockies on Friday. Upper heights will moderate over California into Saturday for a modest warming trend back to near normal.
Satellite loops showed lots of mid level clouds across the area this morning and that moisture will provide up to a 20 percent chance for some isolated thunderstorms over the higher Sierra this afternoon and early evening. Hi resolution guidance focuses on the Sierra crest in Tulare County for convection. Lingering moisture on Sunday will still provide around a 10 percent chance for isolated afternoon thunderstorms along the crest. Southwest flow aloft is expected to bring in some drier air on Monday and put an end to the thunderstorm threat.
AVIATION
Areas of MVFR and local IFR visibilities near wildfires.
Otherwise, VFR conditions will prevail across the central CA interior over 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
Excessive Heat Warning until 8 PM PDT this evening for CAZ337>339.
Heat Advisory until 8 PM PDT this evening for CAZ300>317-319- 321-332.
Link to 1 hour of 5 minute data for KVIS
Terminal Aerodrome Forecast (TAF) for KVIS
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Terminal Aerodrome Forecast (TAF) for KVIS
Wind History graph: VIS
(wind in knots)
San Joaquin Valley, CA,
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