Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 3, NWS Hanford, CA
NWS Hanford, CA issued this flash flood warning at Jul 28, 2021, 4:20 PM PDT for Madera County, Tuolumne County, California. It was in force for 55 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, 4:20 PM PDT (23:20 UTC)
- Expired
- Jul 28, 2021, 5:15 PM PDT
- In force
- 55 min
- Issued by
- NWS Hanford, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Madera County, CA, Tuolumne County, CA
The radar
The San Joaquin Valley radar (KHNX), 161 km from the middle of the area, began a volume at 23:20 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, 11.3 hours before the alert went out and 223 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.
042
WGUS56 KHNX 282320
FFWHNX
CAC039-109-290015-
/O.NEW.KHNX.FF.W.0003.210728T2320Z-210729T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Joaquin Valley CA
420 PM PDT Wed Jul 28 2021
The National Weather Service in Hanford CA has issued a
* Flash Flood Warning for...
Southeastern Tuolumne County in northern California...
Northeastern Madera County in central California...
* Until 515 PM PDT.
* At 419 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 as other drainage
and low lying areas.
* Some locations that will experience flooding include...
Agnew Pass.
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 3779 11921 3774 11927 3773 11926 3773 11924
3771 11922 3774 11919 3774 11913 3770 11908
3760 11919 3765 11930 3772 11938 3782 11925
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
KDThe 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, 3:36 PM PDT | Flash Flood Warning | HNX | Fresno | 67 min |
| Jul 28, 4:02 PM PDT | Flash Flood Warning | HNX | Fresno, Madera | 58 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.