Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 11, NWS Hanford, CA
NWS Hanford, CA issued this flash flood warning at Jul 30, 2021, 3:30 PM PDT for Fresno County, Madera County, Mariposa County, California. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 30, 2021, 3:30 PM PDT (22:30 UTC)
- Expired
- Jul 30, 2021, 4:30 PM PDT
- In force
- 60 min
- Issued by
- NWS Hanford, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Fresno County, CA, Madera County, CA, Mariposa County, CA
The radar
The San Joaquin Valley radar (KHNX), 145 km from the middle of the area, began a volume at 22:25 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, 10.5 hours before the alert went out and 239 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2579 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
775
WGUS56 KHNX 302230
FFWHNX
CAC019-039-043-302330-
/O.NEW.KHNX.FF.W.0011.210730T2230Z-210730T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Joaquin Valley CA
330 PM PDT Fri Jul 30 2021
The National Weather Service in Hanford CA has issued a
* Flash Flood Warning for...
Northeastern Mariposa County in central California...
Northeastern Madera County in central California...
Northeastern Fresno County in central California...
* Until 430 PM PDT.
* At 326 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Two to three inches of rain
have already fallen. Flash flooding is ongoing or expected to
begin shortly.
HAZARD...Flash flooding caused by thunderstorms in and around the
UPPER CREEK FIRE BURN AREA.
SOURCE...Radar indicated.
IMPACT...Flooding of areas in and around the UPPER CREEK FIRE BURN
AREA.
* Some locations that will experience flooding include...
Clover Meadow Wilderness Office, Graveyard Meadow and Green Mtn.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move away from recently burned areas. Life-threatening flooding of
creeks, roads and normally dry arroyos is likely. The heavy rains
may trigger rockslides, mudslides and debris flows in steep terrain,
especially in and around these areas.
&&
LAT...LON 3768 11912 3754 11911 3741 11922 3748 11943
3771 11949
FLASH FLOOD...RADAR INDICATED
$$
Andersen1 follow-up statement
634
WGUS76 KHNX 302322
FFSHNX
Flash Flood Statement
National Weather Service San Joaquin Valley CA
422 PM PDT Fri Jul 30 2021
CAC019-039-043-302331-
/O.EXP.KHNX.FF.W.0011.000000T0000Z-210730T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mariposa CA-Madera CA-Fresno CA-
422 PM PDT Fri Jul 30 2021
...THE FLASH FLOOD WARNING FOR NORTHEASTERN MARIPOSA...NORTHEASTERN
MADERA AND NORTHEASTERN FRESNO COUNTIES WILL EXPIRE AT 430 PM PDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Any runoff will continue over the next hour. Please continue
to heed any remaining road closures.
LAT...LON 3768 11912 3754 11911 3741 11922 3748 11943
3771 11949
$$
AndersenThe office that day
Everything else NWS Hanford, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 5:20 PM PDT | Flash Flood Warning | HNX | Madera | 3 hr |
| Jul 30, 2:52 PM PDT | Flash Flood Warning | HNX | Fresno, Madera | 38 min |
| Jul 30, 4:02 PM PDT | Flash Flood Warning | HNX | Mariposa, Tuolumne | 116 min |
| Jul 30, 4:08 PM PDT | Special Weather Statement | HNX | Mariposa | 22 min |
| Jul 30, 4:20 PM PDT | Special Weather Statement | HNX | Tuolumne | 40 min |
| Jul 30, 4:30 PM PDT | Special Weather Statement | HNX | Mariposa | 45 min |
| Jul 30, 4:33 PM PDT | Flash Flood Warning | HNX | Mariposa | 57 min |
Nearby
Flash Flood Warnings in California, 2021Every flash flood warning in 2021
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.