Alert archive / California / Flash Flood Warnings in 2025

Flash Flood Warning 4, NWS Hanford, CA

August 23, 2025Madera County, Mariposa County, Tuolumne County, California

NWS Hanford, CA issued this flash flood warning at Aug 23, 2025, 2:56 PM PDT for Madera County, Mariposa County, Tuolumne County, California. It was in force for 2 hr. 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 23, 2025, 2:56 PM PDT (21:56 UTC)
Expired
Aug 23, 2025, 5:15 PM PDT
In force
2 hr
Issued by
NWS Hanford, CA
Area
Storm-based polygon
Flood severity
None

Counties Madera County, CA, Mariposa County, CA, Tuolumne County, CA

The radar

The San Joaquin Valley radar (KHNX), 146 km from the middle of the area, began a volume at 21:55 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 nearest sounding before it

Reno, NV (KREV), launched 12:00Z, 9.9 hours before the alert went out and 262 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Reno, NV at 12:00Z on 2025-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Reno, NV at 12:00Z on 2025-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
32 J/kg
Mixed-layer CIN
-266 J/kg
Mixed-layer LCL
2760 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 5:01 PM PDTSpecial Weather StatementHNX44 min
Aug 22, 5:32 PM PDTSpecial Weather StatementHNX43 min
Aug 23, 8:34 AM PDTSpecial Weather StatementHNX26 min
Aug 23, 8:56 AM PDTSpecial Weather StatementHNX34 min
Aug 23, 9:23 AM PDTSpecial Weather StatementHNX37 min
Aug 23, 9:50 AM PDTSpecial Weather StatementHNXMono25 min
Aug 23, 9:53 AM PDTSpecial Weather StatementHNXKern37 min
Aug 23, 10:04 AM PDTSpecial Weather StatementHNX26 min
Aug 23, 10:21 AM PDTSpecial Weather StatementHNXKern24 min
Aug 23, 10:23 AM PDTSpecial Weather StatementHNX37 min
Aug 23, 10:40 AM PDTSpecial Weather StatementHNX35 min
Aug 23, 10:46 AM PDTSpecial Weather StatementHNXKern29 min
Aug 23, 10:53 AM PDTSpecial Weather StatementHNXMono37 min
Aug 23, 10:55 AM PDTSpecial Weather StatementHNXKern35 min
Aug 23, 10:58 AM PDTSpecial Weather StatementHNXMono32 min
Aug 23, 11:05 AM PDTSpecial Weather StatementHNXTulare25 min
Aug 23, 11:09 AM PDTSpecial Weather StatementHNXKern36 min
Aug 23, 11:14 AM PDTSpecial Weather StatementHNXKern31 min
Aug 23, 11:15 AM PDTSpecial Weather StatementHNXTulare30 min
Aug 23, 11:16 AM PDTSpecial Weather StatementHNX29 min
Aug 23, 11:18 AM PDTSpecial Weather StatementHNX27 min
Aug 23, 11:25 AM PDTSpecial Weather StatementHNXKern35 min
Aug 23, 11:29 AM PDTSpecial Weather StatementHNXMono31 min
Aug 23, 11:29 AM PDTSpecial Weather StatementHNXKern31 min
Aug 23, 11:32 AM PDTSpecial Weather StatementHNXTulare28 min
Aug 23, 11:43 AM PDTSpecial Weather StatementHNXKern32 min
Aug 23, 11:45 AM PDTSpecial Weather StatementHNX30 min
Aug 23, 11:46 AM PDTSpecial Weather StatementHNXTulare29 min
Aug 23, 11:57 AM PDTSpecial Weather StatementHNX33 min
Aug 23, 11:58 AM PDTSpecial Weather StatementHNX32 min
Aug 23, 12:05 PM PDTAreal Flood AdvisoryHNXTulare115 min
Aug 23, 12:14 PM PDTSpecial Weather StatementHNX31 min
Aug 23, 12:14 PM PDTSpecial Weather StatementHNXTulare31 min
Aug 23, 12:17 PM PDTSpecial Weather StatementHNXTulare28 min
Aug 23, 12:24 PM PDTSpecial Weather StatementHNX36 min
Aug 23, 12:28 PM PDTAreal Flood AdvisoryHNXFresno2 hr
Aug 23, 12:37 PM PDTSpecial Weather StatementHNXKern23 min
Aug 23, 12:42 PM PDTSpecial Weather StatementHNXKings33 min
Aug 23, 12:43 PM PDTSpecial Weather StatementHNXTulare32 min
Aug 23, 12:47 PM PDTAreal Flood AdvisoryHNXFresno, Tulare118 min
Aug 23, 12:53 PM PDTSpecial Weather StatementHNX37 min
Aug 23, 12:58 PM PDTSpecial Weather StatementHNX32 min
Aug 23, 12:59 PM PDTSpecial Weather StatementHNXKern31 min
Aug 23, 1:05 PM PDTSpecial Weather StatementHNX25 min
Aug 23, 1:15 PM PDTSpecial Weather StatementHNXTulare30 min
Aug 23, 1:15 PM PDTSpecial Weather StatementHNXKings30 min
Aug 23, 1:29 PM PDTSpecial Weather StatementHNXMariposa31 min
Aug 23, 1:30 PM PDTSpecial Weather StatementHNXKern30 min
Aug 23, 1:30 PM PDTSpecial Weather StatementHNXFresno30 min
Aug 23, 1:31 PM PDTSpecial Weather StatementHNX29 min
Aug 23, 1:35 PM PDTSpecial Weather StatementHNXKings25 min
Aug 23, 1:46 PM PDTSpecial Weather StatementHNXFresno29 min
Aug 23, 1:56 PM PDTSpecial Weather StatementHNXMono34 min
Aug 23, 1:57 PM PDTSpecial Weather StatementHNXTuolumne33 min
Aug 23, 1:59 PM PDTSpecial Weather StatementHNXKings31 min
Aug 23, 2:04 PM PDTSpecial Weather StatementHNXFresno26 min
Aug 23, 2:19 PM PDTAreal Flood AdvisoryHNXMadera, Mariposa, Tuolumne37 min
Aug 23, 2:23 PM PDTSpecial Weather StatementHNXTulare37 min
Aug 23, 2:31 PM PDTSpecial Weather StatementHNXKings29 min
Aug 23, 2:32 PM PDTSpecial Weather StatementHNXMono28 min
Aug 23, 2:32 PM PDTSpecial Weather StatementHNXTuolumne28 min
Aug 23, 2:58 PM PDTSpecial Weather StatementHNXMono32 min
Aug 23, 2:59 PM PDTSpecial Weather StatementHNXKings31 min
Aug 23, 3:22 PM PDTSpecial Weather StatementHNXTuolumne38 min

Nearby

Flash Flood Warnings in California, 2025Every flash flood warning in 2025

Sources

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