A large area of high pressure that was centered over the Great Basin area built westward into California on August 31st and brought a period of hot and dry weather to the area which prevailed across the area through much of early September. An Excessive Heat Warning was issued for a large portion of the area including all of the San Joaquin Valley, the West Side Hills, the Sierra Foothills,…
Every event with a place to put it; 28 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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 HNX wrote it up.
A large area of high pressure that was centered over the Great Basin area built westward into California on August 31st and brought a period of hot and dry weather to the area which prevailed across the area through much of early September. An Excessive Heat Warning was issued for a large portion of the area including all of the San Joaquin Valley, the West Side Hills, the Sierra Foothills, Yosemite Valley, The Kern River Valley and the Kern County desert areas and remained in effect until the evening hours of September 9. The large high pressure area finally broke down on September 9 and temperatures remained below dangerous levels on September 10.
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 31, 11:46 PM PST, 14 minutes earlier.
Area Forecast Discussion National Weather Service Hanford CA 1246 AM PDT Thu Sep 1 2022 .SYNOPSIS... Dangerous heat wave to persist through the next week across the area as a strong ridge of high pressure builds. Extremely hot temperatures as much as 15 degrees above normal will be possible by late weekend and into early next week. Some record high temperatures will likely be broken across the valley. Dry weather is expected across the region for the next 7 days. && .DISCUSSION... Wednesday saw temperatures generally in the 101-104 degree range as high pressure began to really heat up the San Joaquin Valley. We are expecting to see highs jump up a few more degrees today as the warming process continues. NBM guidance is showing highs in the 104-107 degree range across the valley. NBM guidance has also been trending more aggressive across the foothills for this heat event. Areas such as Oakhurst could see highs up to 105 today. The upper foothills have been included in the Excessive Heat Warning that is currently sent to expire on Wednesday Evening. Highs trend up even higher on Friday; NBM guidance shows highs ranging from 105-109 in the valley, with highs only a couple degrees less in the foothill regions. Highs on Friday in the Kern County Desert could approach 115. Temperatures may fluctuate a couple of degrees from these levels on Saturday and Sunday. Along with blazing hot afternoon highs will be warm overnight lows this weekend. Overnight lows in rural areas in the low 70's will be possible, and into the upper 70's in urban areas. Monday and Tuesday are now currently being advertised as the hottest days of the heat wave in the SJV. Both afternoon highs and overnight lows are forecast to increase a couple degrees. Widespread high temperatures of 110 will be possible in the valley Monday and Tuesday, with lows in the mid 70's to lower 80's possible in the hottest parts of the valley. Several record high temperatures across the valley are likely to fall over the weekend and early next week. Ensemble guidance shows the heat lingering into Wednesday as the high pressure pattern tries to weaken ahead of trough passing through the Pacific Northwest. Ensemble guidance is suggesting the ridge to flatten a bit more by Thursday, which may take highs back to the 100-103 degree range in the valley. To recap the situation, this late season heat wave may lead to some of the hottest temperatures of the year. Do what you can to protect yourself from the heat. Stay hydrated. Limit time outdoors. If you need to be outdoors, wear light and loose fitting clothing. Stay indoors in an air conditioned building, possibly a cooling center if needed. Hopefully this is the last major hot spell of the summer as the summer has been very hot and dry for the entire region. && .AVIATION...VFR conditions will prevail across the Central CA interior through at least the next 24 hours. && .AIR QUALITY ISSUES... ISSUED: 08/31/2022 14:32 EXPIRES: 09/01/2022 23:59 On Thursday September 1 2022... Unhealthy for Sensitive Groups in Fresno... Kern... Madera and Tulare Counties... and Sequoia National Park and Forest. && .CERTAINTY... The level of certainty for days 1 and 2 is high. The level of certainty for days 3 through 7 is high. Certainty levels include low...medium...and high. Please visit www.weather.gov/hnx/certainty.html for additional information an/or to provide feedback. && .HNX WATCHES/WARNINGS/ADVISORIES... Excessive Heat Warning until 8 PM PDT Wednesday for CAZ300>322- 324-332-336>339. && ab weather.gov/hanford
The national radar mosaic for the moment the first event began.
28 excessive heat. Local standard time, as filed.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 103 and 108 degrees on September 1, 3 and 4, between 105 and 110 degrees on September 2, 5, 8 and 9 and between 110 and 115 degrees on September 6 and 7.
Daytime highs generally ranged between 100 and 105 degrees on September 1, 3 and 4, between 102 and 107 degrees on September 2, 5, 8 and 9 and between 107 and 112 degrees on September 6 and 7.
Daytime highs generally ranged between 100 and 105 degrees on September 1, 3 and 4, between 102 and 107 degrees on September 2, 5, 8 and 9 and between 107 and 112 degrees on September 6 and 7.
Daytime highs generally ranged between 100 and 105 degrees on September 1, 3 and 4, between 102 and 107 degrees on September 2, 5, 8 and 9 and between 107 and 112 degrees on September 6 and 7.
Daytime highs generally ranged between 100 and 105 degrees on September 1, 3 and 4, between 102 and 107 degrees on September 2, 5, 8 and 9 and between 107 and 112 degrees on September 6 and 7.
Daytime highs generally ranged between 100 and 105 degrees on September 1, 3 and 4, between 102 and 107 degrees on September 2, 5, 8 and 9 and between 107 and 112 degrees on September 6 and 7.
Daytime highs generally ranged between 108 and 113 degrees each day between September 1 and September 7.
Daytime highs generally ranged between 108 and 113 degrees each day between September 1 and September 7.
Daytime highs generally ranged between 108 and 113 degrees each day between September 1 and September 7.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2022Every state in 2022This day in weather historyWarnings in California, September 2022
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 2026-10-01. Each event’s entry at NCEI: 1045099, 1045100, 1045101, 1045102, 1045103, 1045104, 1045105, 1045106, 1045107, 1045108, 1045109, 1045110, 1045111, 1045112, 1045113, 1045114, 1045115, 1045116, 1045117, 1045118, 1045119, 1045120, 1045121, 1045122, 1045123, 1045125, 1045126, 1045127.