Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 6, NWS Hanford, CA
NWS Hanford, CA issued this flash flood warning at Jul 29, 2021, 2:03 PM PDT for Madera County, Mariposa County, California. It was in force for 117 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 29, 2021, 2:03 PM PDT (21:03 UTC)
- Expired
- Jul 29, 2021, 4:00 PM PDT
- In force
- 117 min
- Issued by
- NWS Hanford, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties 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 21:05 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, 9.1 hours before the alert went out and 241 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
- 2873 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
241
WGUS56 KHNX 292103
FFWHNX
CAC039-043-292300-
/O.NEW.KHNX.FF.W.0006.210729T2103Z-210729T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Joaquin Valley CA
203 PM PDT Thu Jul 29 2021
The National Weather Service in Hanford CA has issued a
* Flash Flood Warning for...
East central Mariposa County in central California...
Northeastern Madera County in central California...
* Until 400 PM PDT.
* At 202 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. 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...
Buck Camp Ranger Station.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 3770 11924 3744 11931 3746 11956 3772 11947
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
ab1 follow-up statement
522 WGUS76 KHNX 292252 FFSHNX Flash Flood Statement National Weather Service San Joaquin Valley CA 352 PM PDT Thu Jul 29 2021 CAC039-043-292300- /O.EXP.KHNX.FF.W.0006.000000T0000Z-210729T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Mariposa CA-Madera CA- 352 PM PDT Thu Jul 29 2021 ...THE FLASH FLOOD WARNING FOR EAST CENTRAL MARIPOSA AND NORTHEASTERN MADERA COUNTIES WILL EXPIRE AT 400 PM PDT... The heavy rain has ended. Flood waters will continue to recede, and flash flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3770 11924 3744 11931 3746 11956 3772 11947 $$ CMc
The office that day
Everything else NWS Hanford, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 5:07 PM PDT | Flash Flood Warning | HNX | Madera, Mariposa, Tuolumne | 3 min |
| Jul 28, 5:23 PM PDT | Flash Flood Warning | HNX | Madera, Mariposa, Tuolumne | 82 min |
| Jul 28, 7:00 PM PDT | Special Weather Statement | HNX | Tulare | 45 min |
| Jul 29, 9:38 AM PDT | Flash Flood Watch | HNX | 58 hr | |
| Jul 29, 1:51 PM PDT | Special Weather Statement | HNX | Mariposa | 39 min |
| Jul 29, 1:52 PM PDT | Special Weather Statement | HNX | Mariposa | 38 min |
| Jul 29, 2:24 PM PDT | Special Weather Statement | HNX | Tuolumne | 36 min |
| Jul 29, 3:07 PM PDT | Special Weather Statement | HNX | Mariposa | 38 min |
| Jul 29, 3:21 PM PDT | Flash Flood Warning | HNX | Mariposa, Tuolumne | 84 min |
| Jul 29, 3:46 PM PDT | Flash Flood Warning | HNX | Mariposa | 119 min |
| Jul 29, 4:41 PM PDT | Areal Flood Advisory | HNX | Mariposa, Tuolumne | 64 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.