Alert archive / California / Excessive Heat Warnings in 2017

Excessive Heat Warning 4, NWS San Diego, CA

August 26, 20174 counties in California

NWS San Diego, CA issued this excessive heat warning at Aug 26, 2017, 3:59 AM PDT for 4 counties in California. It took effect at Aug 27, 2017, 10:00 AM PDT. It was in force for 6 days. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 26, 2017, 3:59 AM PDT (10:59 UTC)
In effect from
Aug 27, 2017, 10:00 AM PDT
Expired
Sep 2, 2017, 9:10 PM PDT
In force
6 days
Issued by
NWS San Diego, CA

Counties Orange County, CA, Riverside County, CA, San Bernardino County, CA, San Diego County, CA

The radar

The Santa Ana Mts radar (KSOX), 88 km from the middle of the area, began a volume at 10:58 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 26, 3:59 AM PDTHeat AdvisorySGXOrange, Riverside, San Bernardino, San Diego8 days

Nearby

Excessive Heat Warnings in California, 2017Every excessive heat warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.