Well above average temperatures began the month of June. Highs in the upper 90’s to above 100 degrees prevailed in the San Joaquin Valley and Kern County desert on the 1st.
Every event with a place to put it; 1 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.
Well above average temperatures began the month of June. Highs in the upper 90’s to above 100 degrees prevailed in the San Joaquin Valley and Kern County desert on the 1st. A record high minimum temperature of 76 degrees was even reached in Bakersfield, although the old record was 75 degrees (set in 2021).
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 Jun 1, 9:07 PM PST, 7 hours 53 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Hanford CA 1007 PM PDT Sun Jun 1 2025 .UPDATE...Updated Aviation Section. && .KEY MESSAGES... 1. Minor to Moderate Heat Risk is expected across the lower elevations of the region today with less Heat Risk for the remainder of the week. 2. A disturbance will allow for the development of strong winds over the mountains and across the Eastern Mojave Slopes of the Kern County Mountains Today and Monday. 3. Mountain thunderstorms are possible this afternoon and again on Monday. && .DISCUSSION... A cool-down is now in play across the region as a cold front introduces maritime air today. With the marine layer at Fort Ord reaching almost 2000 feet, will expect some spill-over into the Central California. 24 hour temperature change is already showing the surge in cooler air as values drop by as much as 6 degrees from Saturday morning. So far, the cooler air has reached areas from Fresno County, northward, with cooling expected on Monday. The cold front will also influence winds over the area as breezy conditions are expected later today through early Monday morning. In the meanwhile, the southerly moisture surge will continue today as mountain convection will once again occur across the Sierra Nevada. Once the cold front moves through, dry air and a warming trend will begin early this week. Afternoon max temperatures will struggle to reach 100 degrees across the San Joaquin Valley until the weekend. Probability of Exceedance (PoE) of reaching 100 degrees across the San Joaquin Valley is still showing percentages of 15% to 60% this Sunday. The higher percentages sit over the West-Side around Huron and Lemoore, as well as, near Bakersfield. Afterward, PoE of reaching 95 degrees does not show widespread 50% until Friday. Therefore, the warming trend will be slow as ensemble do not hint toward reaching 100 degrees until next Saturday. A weak disturbance later in the week will slow the warming progression as the Central Valley enjoys below triple digit heat until next weekend. The cold front will increase winds this Sunday allowing westerly wind to increase during frontal passage. In the meanwhile, ensemble flow aloft continues to show the southerly winds reaching Central California as convection is expected across the mountain range. By Monday, the westerly flow will begin the dominate the region as only lingering convection will be observed. Tuesday will be a transition to minimal change in temperatures and dry conditions over the region. Probability of Thunder today sits at near 20% and diminishes to near 5% over the coming days. During the same time period, winds reaching 35 mph also diminish from 50% to 70% today to near 20% by Mid-week. Except for an increase in winds on Thursday, winds will generally be light during the period. && .AVIATION... 06Z Update: VFR conditions will prevail for the next 24 hours across the Central California Interior. A 15-25% chance of thunderstorms will exist across the Sierra Nevada from 19Z Mon to 03Z Tue. && .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... None. && public...Molina aviation....BSO weather.gov/hanford
The national radar mosaic for the moment the first event began.
1 heat. Local standard time, as filed.
A record high minimum temperature of 76 degrees was even reached in Bakersfield, although the old record was 75 degrees (set in 2021).
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2025Every state in 2025This day in weather historyWarnings in California, June 2025
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: 1272531.