Excessive Heat, Se S.J. Valley
- When
- August 30, 5:00 PM PST to August 31, 7:00 AM PST
- Where
- Se S.J. Valley forecast zone
- Reported by
- ASOS
Excessive Heat in California, August 30 to 31, 2007
Strong high pressure caused excessively hot temperatures to develop over the southern San Joaquin Valley during the end of August, 2007. Energy officials urged valley residents to conserve energy during this time period, between the 30th and 31st.
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
Strong high pressure caused excessively hot temperatures to develop over the southern San Joaquin Valley during the end of August, 2007. Energy officials urged valley residents to conserve energy during this time period, between the 30th and 31st. The temperature at Meadows Field in Bakersfield hit 104 degrees on the 30th and 106 degrees on the 31st. The nighttime heat index on the night of the 30th remained at or above 82 degrees. These temperatures met critical criteria for heat advisory conditions in the San Joaquin Valley.
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 Aug 30, 1:45 PM PST, 3 hours 15 minutes earlier.
Area forecast discussion, Aug 30, 1:45 PM PST, 3 hours 15 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 245 PM PDT THU AUG 30 2007 .DISCUSSION... MONSOON MOISTURE LIFTING NORTHWARD AROUND THE UPPER RIDGE THAT IS OVER THE FOUR CORNERS AREA PROVIDED FOR SHOWERS AND THUNDERSTORMS ACROSS THE FORECAST AREA. THE BEST ISENTROPIC UPGLIDE IN ASSOCIATION WITH THE MID LEVEL DISTURBANCE THAT MOVED THROUGH HAS RELAXED NOW AND THE DEEP LEVEL MOISTURE HAS BEGUN TO BECOME MORE SHALLOW FROM THE KERN COUNTY AREA SPREADING NORTH. WOULD EXPECT THE CLEARING SKIES TO CONTINUE THIS EVENING WITH ONLY A MENTION OF A FEW SHOWERS FROM FRESNO COUNTY NORTHWARD. THE ONLY CONCERN WOULD BE THE CONVECTIVE PARAMETERS ARE INDICATING INSTABILITY ACROSS THE REGION THIS AFTERNOON WITH LI VALUES 0 TO -2 AND CAPES AROUND 600 J/KG. THE ONLY INHIBITOR IS THE MID LEVEL CAP THAT IS DEVELOPING BEHIND THE UPPER AIR SYSTEM THAT IS MOVING THROUGH. RESIDUAL MOISTURE WILL ALSO PLAY A FACTOR IN CLOUDS DEVELOPING THIS AFTERNOON. THINGS WILL CLEAR OUT TONIGHT AND REMAIN CLEAR FOR THE NEXT SEVERAL DAYS. ONLY ISOLATED THUNDER ALONG THE CREST CAN BE EXPECTED ON FRIDAY AND POSSIBLY INTO SAT. WITH THE RIDGE EXPECTED TO BUILD IN OVER THE AREA TEMPERATURES ARE FORECAST TO REACH NEAR RECORD LEVELS ACROSS SEVERAL LOCATIONS ON FRIDAY. THE RIDGE IS EXPECTED TO REMAIN OVER THE AREA THROUGH TUESDAY WITH TEMPERATURES REMAINING WELL ABOVE NORMAL THROUGH THE PERIOD. AN UPPER TROUGH WILL ENTER THE PAC NW LATE ON TUESDAY AND BRING IN A TROUGH OF LOW PRESSURE INTO THE WEST COAST BY TUESDAY NIGHT. THE UPPER LOW LOOKS TO BE VERY PROGRESSIVE AND REMAINS WELL NORTH OF THE REGION AND MAY NOT HAVE A SIGNIFICANT IMPACT ON TEMPERATURES AS PREVIOUSLY THOUGHT. THE ECMWF WIS NOT BUDGING THE RIDGE VERY MUCH OVER THE REGIONS AND WOULD TEND TO KEEP TEMPS UP...ONLY SLIGHTLY ABOVE NORMAL AS OPPOSED TO THE HEAT WAVE WE ARE EXPERIENCING. THE GFS IS DOING SOME VERY INTERESTING THINGS WITH A POSSIBLE TROPICAL FEATURE THAT DEVELOPS BY WED NIGHT AND MOVES RAPIDLY UP THE COAST OF BAJA ON THURSDAY AND INTO EXTREME SRN CA BY LATE THURSDAY NIGHT. WILL TREND TEMPS TOWARDS CLIMO THROUGH THE LATER PART OF THE EXTENDED AND KEEP THINGS DRY. && .AVIATION...SCATTERED SHOWERS AND THUNDERSTORMS NORTH OF KERN COUNTY WILL GRADUALLY DISSIPATE THROUGH THIS AFTERNOON AND EVENING. PRECIPITATION WILL END OVER THE CENTRAL SAN JOAQUIN VALLEY BY 01Z AND BY AROUND 03Z OVER THE SOUTHERN SIERRA NEVADA. OTHERWISE...VFR CONDITIONS CAN BE EXPECTED THROUGH 00Z SATURDAY. FOR SPECIFIC DETAILS...PLEASE REFER TO THE TAFS FOR KMCE...KFAT AND KBFL...AND TWEB ROUTES 421 AND 423. && .AIR QUALITY ISSUES... NONE. && .HNX WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY UNTIL 7 PM PDT SATURDAY FOR CAZ089>094. && AVN/FW...DCH PUBLIC...JDB WEATHER.GOV/HANFORD
Hazardous weather outlook, Aug 30, 5:05 AM PST, 11 hours 55 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 605 AM PDT THU AUG 30 2007 CAZ089>094-311315- WEST CENTRAL SAN JOAQUIN VALLEY-EAST CENTRAL SAN JOAQUIN VALLEY- SOUTHWESTERN SAN JOAQUIN VALLEY-SOUTHEASTERN SAN JOAQUIN VALLEY- MARIPOSA MADERA AND FRESNO COUNTY FOOTHILLS- TULARE COUNTY FOOTHILLS- 605 AM PDT THU AUG 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL AND SOUTHERN SAN JOAQUIN VALLEY AND THE ADJACENT FOOTHILLS. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS WILL CONTINUE THROUGH THE MORNING. A HEAT ADVISORY IS IN EFFECT FOR TODAY FROM 2 PM UNTIL 7 PM. PLEASE REFER TO THE LATEST WEATHER MESSAGE ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN HANFORD AT /WWUS76 KHNX/ OR /SFONPWHNX/ FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A HEAT ADVISORY CONTINUES FOR FRIDAY AND SATURDAY FROM 2 PM UNTIL 7 PM EACH DAY. PLEASE REFER TO THE LATEST WEATHER MESSAGE ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN HANFORD AT /WWUS76 KHNX/ OR /SFONPWHNX/ FOR FURTHER DETAILS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS TO THE SAN JOAQUIN VALLEY NATIONAL WEATHER SERVICE OFFICE. WEATHER.GOV/HANFORD CAZ098-099-311315- INDIAN WELLS VALLEY-SOUTHEASTERN KERN COUNTY DESERT- 605 AM PDT THU AUG 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE KERN COUNTY DESERTS. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS WILL CONTINUE THROUGH THE MORNING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS TO THE SAN JOAQUIN VALLEY NATIONAL WEATHER SERVICE OFFICE. WEATHER.GOV/HANFORD JEB
In the hours before
Local storm report, Aug 30, 3:16 PM PST, 1 hour 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA
416 PM PDT THU AUG 30 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0355 PM LIGHTNING VISALIA 36.33N 119.32W
08/30/2007 TULARE CA LAW ENFORCEMENT
CHP REPORTS THAT A POWER POLE WAS HIT BY LIGHTNING. POWER
LINES WERE SPARKING NEARBY. HAPPENED IN THE SR 99 AND
MERRITT DRIVE AREA. NO FURTHER DETAILS.
&&
STACHELSKIEvent by event
1 excessive heat. Local standard time, as filed.
What these are
- Excessive Heat
- Heat at or above the local excessive heat warning criteria, or heat that caused deaths.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Damaging Winds and Lightning Strike in Mississippi, August 30 to 31, 2007
- Flash Flooding and Hail in Oregon, August 30, 2007
- Lightning Strike in Alabama, August 30, 2007
- Hail and Damaging Wind in New York, August 30, 2007
- Lightning Strikes in Georgia, August 30 to 31, 2007
- Hail and Damaging Winds in Maine, August 30, 2007
- Lightning Strikes in California, August 30 to 31, 2007
- Hail and Damaging Wind in South Carolina, August 30, 2007
- Dust Storm and Damaging Wind in Nevada, August 30, 2007
- Hail and Damaging Winds in Pennsylvania, August 30, 2007
- Hail and Damaging Wind in New Hampshire, August 30, 2007
- Excessive Heat in California, August 30 to 31, 2007
More
Every storm in California in 2007Every state in 2007This day in weather historyWarnings in California, August 2007
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: 59190.