Strong Wind, Kern Cty Mtns
- When
- September 29, 6:33 PM PST to 9:13 PM PST
- Where
- Kern Cty Mtns forecast zone
- Measured
- 35 kt (40 mph) measured gust
- Property damage
- $100
- Reported by
- Mesonet
Strong Wind in California, September 29, 2009
An upper-level trough brought an unseasonably cold airmass to central California for the last days of September. High temperatures in the central and southern San Joaquin Valley on the 29th were as much as 23 degrees cooler than the previous day.
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $200
- Crop damage
- None recorded
- Events
- 2
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS HNX wrote it up.
An upper-level trough brought an unseasonably cold airmass to central California for the last days of September. High temperatures in the central and southern San Joaquin Valley on the 29th were as much as 23 degrees cooler than the previous day. As the cold front moved through the region on the 29th, winds gusted to 40 mph at Hanford, and to 52 mph at Mojave. Winds were also gusty at the base of the Grapevine in the far southern San Joaquin Valley, where winds measured at the CHP Weigh Station gusted to around 35 mph during the afternoon of the 29th.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Hanford, CA wrote its last area forecast discussion before the first event at Sep 29, 2:05 PM PST, 4 hours 28 minutes earlier.
Area forecast discussion, Sep 29, 2:05 PM PST, 4 hours 28 minutes before
AREA FORECAST DISCUSSION...CORRECTED NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 305 PM PDT TUE SEP 29 2009 .DISCUSSION...AT 20Z...SATELLITE LOOPS SHOWED THE UPPER-LEVEL TROUGH AXIS ALONG THE PACIFIC NORTHWEST/NORTHERN CALIFORNIA COAST...AND THE BACK EDGE OF THE COLD FRONT MOVING THROUGH THE SAN FRANCISCO BAY AREA. RADAR INDICATES THAT THE BANDS OF MOSTLY VIRGA ARE DISSIPATING AT THIS TIME...AND EXPECT ONLY A FEW LIGHT SHOWERS OVER THE SOUTHERN SIERRA NEVADA LATER THIS AFTERNOON AND TONIGHT. THE TROUGH CONTINUES TO SLOWLY MOVE THROUGH CALIFORNIA...AND IS EVEN A BIT SLOWER THAN THE 18Z MODELS FORECASTED. AS A RESULT...WINDS HAVE BEEN SLOWER TO INCREASE THAN EXPECTED...AND WILL NOT IMPACT THE HANFORD WARNING/FORECAST AREA UNTIL LATE THIS AFTERNOON AND THIS EVENING. 21Z OBSERVATIONS SHOWED WINDS GUSTING TO 20 KTS AT THE MERCED MUNICIPAL AIRPORT. THE HANFORD DOPPLER RADAR VAD WIND PROFILER SHOWS WINDS AT 25 KTS AT 8000 FEET AGL...INCREASING TO 45 KTS AT 20000 FEET. THE WINDS ARE ON TRACK TO REACH THE SOUTHERN SAN JOAQUIN VALLEY AND ADJACENT MOUNTAINS BY 23Z /1600 PDT/ AND THROUGH THE KERN COUNTY MOUNTAINS THIS EVENING. WITH THE SLOWER TIMING OF THE FRONT...EXPECT THE STRONGEST WINDS WILL NOT BEGIN UNTIL THIS EVENING AND CONTINUE OVERNIGHT. HAVE THEREFORE EXTENDED THE WIND ADVISORY FOR THE KERN COUNTY MOUNTAINS AND DESERTS THROUGH 16Z WEDNESDAY. CENTRAL AND SOUTHERN SAN JOAQUIN VALLEY TEMPERATURES AT 21Z RANGED FROM 69-81 DEGREES...WITH THE WARMEST TEMPERATURES AT BAKERSFIELD THE PORTERVILLE MUNICIPAL AIRPORT /BOTH 81/. THESE TEMPERATURES WERE DOWN 16-23 DEGREES FROM 21Z MONDAY...AND HIGHS THIS AFTERNOON ARE EXPECTED TO BE 5-10 DEGREES BELOW NORMAL. THE TROUGH WILL MOVE INTO THE ROCKIES WEDNESDAY...BUT WITH THE COLD AIR POOLED OVER THE SAN JOAQUIN VALLEY...TEMPERATURES WILL CONTINUE WELL BELOW NORMAL. A DRY NORTHWEST FLOW WILL SET UP OVER CALIFORNIA BEHIND THE TROUGH...AND IF THERE IS SUFFICIENT LOW-LEVEL MOISTURE... COULD SEE UPSLOPE CLOUDS OVER THE SOUTH END OF THE VALLEY AND ALONG THE EAST SIDE. TEMPERATURES WILL WARM TO SLIGHTLY ABOVE NORMAL BY FRIDAY AS A SHORT- WAVE UPPER-LEVEL RIDGE MOVES OVER CALIFORNIA. ANOTHER TROUGH REACHES THE PACIFIC NORTHWEST FRIDAY AND IS FORECAST TO MERGE WITH A CLOSED LOW NEAR 25N/138W. THIS WILL HOLD THE TROUGH OVER THE REGION THROUGH THE WEEKEND. ANOTHER CLOSED LOW FORMING IN THE TROUGH AND DROPS INTO THE GREAT BASIN SATURDAY NIGHT. THE MEDIUM-RANGE MODELS KEEP THIS LOW IN PLACE OVER THE GREAT BASIN THROUGH NEXT MONDAY FOR COOLER WEATHER AND ANOTHER CHANCE FOR MOUNTAIN RAIN/SNOW SHOWERS. && .AVIATION...AREAS OF MVFR VISIBILITIES IN BLOWING DUST ALONG THE WEST SIDE OF THE SAN JOAQUIN VALLEY AND THE KERN COUNTY DESERTS THROUGH 06Z WEDNESDAY. LOCAL MVFR CEILINGS IN ISOLATED SHOWERS OVER THE SOUTHERN SIERRA NEVADA FROM MADERA COUNTY NORTHWARD THROUGH 12Z WEDNESDAY. A STRATOCUMULUS DECK AROUND 5000 FEET BANKED ALONG THE SOUTH END AND EAST SIDE OF THE VALLEY AND THE ADJACENT FOOTHILLS MAY CAUSE SOME MOUNTAIN OBSCURATIONS BETWEEN 06Z AND 18Z WEDNESDAY. OTHERWISE...VFR CONDITIONS CAN BE EXPECTED ACROSS THE CENTRAL CALIFORNIA INTERIOR THROUGH 18Z WEDNESDAY. && .AIR QUALITY ISSUES... NONE. && .HNX WATCHES/WARNINGS/ADVISORIES... WIND ADVISORY UNTIL 9 AM PDT WEDNESDAY FOR THE KERN COUNTY MOUNTAINS AND DESERTS /CAZ095-098-099/. && PUBLIC...SANGER AVN/FW...JEB WEATHER.GOV/HANFORD
Hazardous weather outlook, Sep 29, 2:27 PM PST, 4 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 327 PM PDT TUE SEP 29 2009 CAZ095-098-099-301200- KERN COUNTY MOUNTAINS-INDIAN WELLS VALLEY- SOUTHEASTERN KERN COUNTY DESERT- 327 PM PDT TUE SEP 29 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE KERN COUNTY MOUNTAINS AND DESERTS. .DAY ONE...THIS AFTERNOON AND TONIGHT WIND ADVISORY IN EFFECT UNTIL 900 AM WEDNESDAY MORNING FOR THE KERN COUNTY MOUNTAINS AND DESERTS. SEE SFONPWHNX /WMO HEADER WWUS76 KHNX/ FOR DETAILS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE WIND ADVISORY REMAINS IN EFFECT UNTIL 900 AM WEDNESDAY MORNING FOR THE KERN COUNTY MOUNTAINS AND DESERTS. OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT OR UNUSUAL CONDITIONS TO THE NATIONAL WEATHER SERVICE. BSO WEATHER.GOV/HANFORD
Event by event
2 strong wind. Local standard time, as filed.
Strong Wind, Se Kern Cty Desert
- When
- September 29, 8:00 PM PST to 9:00 PM PST
- Where
- Se Kern Cty Desert forecast zone
- Measured
- 45 kt (52 mph) measured gust
- Property damage
- $100
- Reported by
- Mesonet
What these are
- Strong Wind
- Non-thunderstorm winds below high wind criteria that nonetheless caused damage or casualties.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tsunami in American Samoa, September 29, 2009
- Strong Wind in California, September 29, 2009
- Dust Storm and Strong Wind in Nevada, September 29, 2009
- Winter Storm and High Wind in Utah, September 29 to 30, 2009
- Drought in Texas, September 29 to 30, 2009
- High Wind in Nevada, September 29 to 30, 2009
- Tropical Storm in Guam, September 29 to 30, 2009
- Flash Flood in Texas, September 29, 2009
- Frost and Freeze in Alaska, September 29, 2009
- High Wind in California, September 29, 2009
- Flash Flood in Texas, September 29, 2009
More
Every storm in California in 2009Every state in 2009This day in weather historyWarnings in California, September 2009
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 197258, 197259.