Alert archive / California / Flash Flood Watches in 2020

Flash Flood Watch 1, NWS San Diego, CA

March 11, 2020Riverside County, San Bernardino County, San Diego County, California

NWS San Diego, CA issued this flash flood watch at Mar 11, 2020, 1:23 PM PDT for Riverside County, San Bernardino County, San Diego County, California. It took effect at Mar 12, 2020, 12:00 PM PDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued
Mar 11, 2020, 1:23 PM PDT (20:23 UTC)
In effect from
Mar 12, 2020, 12:00 PM PDT
Expired
Mar 13, 2020, 9:00 AM PDT
In force
21 hr
Issued by
NWS San Diego, CA
Flood severity
None

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

The radar

The Santa Ana Mts radar (KSOX), 122 km from the middle of the area, began a volume at 20:23 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.

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Diego, CA wrote its last area forecast discussion before this flash flood watch went out at Mar 11, 10:17 AM PDT, 3 hours 6 minutes earlier.

Area forecast discussion, Mar 11, 10:17 AM PDT, 3 hours 6 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Mar 10, 6:13 PM PDTAreal Flood AdvisorySGXSan Diego2 hr

Nearby

Flash Flood Watches in California, 2020Every flash flood watch in 2020

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.