Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS Hanford, CA
NWS Hanford, CA issued this flash flood warning at Jul 28, 2021, 3:36 PM PDT for Fresno County, California. It was in force for 67 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 28, 2021, 3:36 PM PDT (22:36 UTC)
- Expired
- Jul 28, 2021, 4:43 PM PDT
- In force
- 67 min
- Issued by
- NWS Hanford, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Fresno County, CA
The radar
The San Joaquin Valley radar (KHNX), 133 km from the middle of the area, began a volume at 22:35 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, 10.6 hours before the alert went out and 254 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
- 2712 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- -22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
637
WGUS56 KHNX 282236
FFWHNX
CAC019-290130-
/O.NEW.KHNX.FF.W.0001.210728T2236Z-210729T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Joaquin Valley CA
336 PM PDT Wed Jul 28 2021
The National Weather Service in Hanford CA has issued a
* Flash Flood Warning for...
Northeastern Fresno County in central California...
* Until 630 PM PDT.
* At 336 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to one inch of rain has
already fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flooding include...
Lake Thomas Edison, Volcanic Knob and Florence Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3747 11891 3727 11875 3720 11891 3737 11906
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
KD1 follow-up statement
233 WGUS76 KHNX 282343 FFSHNX Flash Flood Statement National Weather Service San Joaquin Valley CA 443 PM PDT Wed Jul 28 2021 CAC019-282353- /O.CAN.KHNX.FF.W.0001.000000T0000Z-210729T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Fresno CA- 443 PM PDT Wed Jul 28 2021 ...THE FLASH FLOOD WARNING FOR NORTHEASTERN FRESNO COUNTY IS CANCELLED... The heavy rain has ended. Flooding is no longer expected to pose a threat. LAT...LON 3747 11891 3727 11875 3720 11891 3737 11906 $$ KD
The office that day
Everything else NWS Hanford, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 5:47 PM PDT | Special Weather Statement | HNX | 43 min | |
| Jul 28, 2:59 PM PDT | Special Weather Statement | HNX | 46 min | |
| Jul 28, 4:02 PM PDT | Flash Flood Warning | HNX | Fresno, Madera | 58 min |
| Jul 28, 4:20 PM PDT | Flash Flood Warning | HNX | Madera, Tuolumne | 55 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.