A stagnant high pressure system overhead combined with a diminished delta breeze allowed overnight temperatures to remain unusually warm, setting or tying record daily high minimum temperatures in the southern Sacramento and northern San Joaquin Valleys.
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.
The episode as NWS STO wrote it up.
A stagnant high pressure system overhead combined with a diminished delta breeze allowed overnight temperatures to remain unusually warm, setting or tying record daily high minimum temperatures in the southern Sacramento and northern San Joaquin Valleys.
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 Sacramento, CA wrote its last area forecast discussion before the first event at Aug 31, 8:15 PM PST, 3 hours 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SACRAMENTO CA 915 PM PDT FRI AUG 31 2007 .DISCUSSION... RADAR SHOWS EVENING CONVECTION OVER SHASTA COUNTY HAS ENDED WITH JUST SOME LINGERING MID LEVEL CLOUDS IN THAT AREA. SKIES ARE CLEARING ELSEWHERE. WATER VAPOR SHOWS DRIER...MORE STABLE SOUTHWESTERLY FLOW OVER THE REGION. TEMPERATURES ARE 4-5 DEGREES COOLER THIS EVENING AROUND SACRAMENTO AS DELTA BREEZE PICKS UP WITH A SFO-SAC GRADIENT AROUND 3 MB. OVERNIGHT LOWS SHOULD BE SLIGHTLY MORE COMFORTABLE OVERALL. HIGHS ON SATURDAY WILL BE A BE SIMILAR TO TODAY AND PERHAPS A LITTLE WARMER AS 850 MB TEMPERATURES ARE A BIT HIGHER WITH GREATER 1000-500 MB THICKNESS. OVERALL...FORECAST LOOKS ON TRACK WITH NO MAJOR CHANGES MADE. && .AVIATION... VFR CONDITIONS EXPECTED OVER NIGHT INTO SATURDAY. && .STO WATCHES/WARNINGS/ADVISORIES...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SACRAMENTO CA 538 AM PDT FRI AUG 31 2007 CAZ013>019-063-064-066>069-011400- SHASTA LAKE AREA/NORTHERN SHASTA COUNTY- BURNEY BASIN/EASTERN SHASTA COUNTY-NORTHERN SACRAMENTO VALLEY- CENTRAL SACRAMENTO VALLEY-SOUTHERN SACRAMENTO VALLEY- CARQUINEZ STRAIT AND DELTA-NORTHERN SAN JOAQUIN VALLEY- MOUNTAINS SOUTHWESTERN SHASTA TO NORTHERN LAKE COUNTIES- CLEAR LAKE/SOUTHERN LAKE COUNTY-MOTHERLODE- EAST FOOTHILLS/NORTH SACRAMENTO VALLEY- WESTERN PLUMAS COUNTY/LASSEN PARK-WEST SLOPE NORTHERN SIERRA NEVADA- 538 AM PDT FRI AUG 31 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA. .DAY ONE...TODAY SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS THE NORTHERN MOUNTAINS AND NORTHERN SACRAMENTO VALLEY BEGINNING BY LATE THIS MORNING AND CONTINUING THROUGH THE AFTERNOON. LOCALLY HEAVY RAIN WILL BE POSSIBLE WITH SOME OF THE STORMS ACROSS THE NORTHERN MOUNTAINS THIS AFTERNOON. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. THE LATEST WEATHER INFORMATION IS AVAILABLE ON THE INTERNET AT (LOWER CASE): HTTP://WWW.WRH.NOAA.GOV/STO
3 heat. Local standard time, as filed.
The low temperature at Modesto only dropped to a very warm 75 degrees, which broke the previous high minimum daily record of 72 degrees set in 1998.
The high minimum temperature daily record of 71 degrees was tied at downtown Sacramento. This record was originally set in 1998.
The high minimum temperature daily record of 66 degrees at Sacramento Executive Airport was tied. The record was previously set in 2000.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2007Every state in 2007This day in weather historyWarnings in California, September 2007
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: 53096, 53100, 53102.