Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 14, NWS Hanford, CA
NWS Hanford, CA issued this flash flood warning at Jul 31, 2021, 4:08 PM PDT for Kern 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 outline as issued.
The facts
- Issued
- Jul 31, 2021, 4:08 PM PDT (23:08 UTC)
- Expired
- Jul 31, 2021, 6:30 PM PDT
- In force
- 2 hr
- Issued by
- NWS Hanford, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Kern County, CA
The radar
The Edwards AFB radar (KEYX), 84 km from the middle of the area, began a volume at 23:12 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
Vandenberg AFB, CA (KVBG), launched 12:00Z, 11.1 hours before the alert went out and 242 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
- 1862 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
943
WGUS56 KHNX 312308
FFWHNX
CAC029-010030-
/O.NEW.KHNX.FF.W.0014.210731T2308Z-210801T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Joaquin Valley CA
408 PM PDT Sat Jul 31 2021
The National Weather Service in Hanford CA has issued a
* Flash Flood Warning for...
Northeastern Kern County in central California...
* Until 530 PM PDT.
* At 404 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between three quarters to one
inch of rain has fallen over the last hour. 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, highways, as well
as other drainage and low lying areas.
* Some locations that will experience flooding include...
Onyx, and state route 178 east of of Onyx.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3575 11810 3571 11805 3568 11805 3562 11811
3563 11817 3568 11818 3572 11816 3574 11814
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...one half to one inches IN the next hour.
$$
CMc2 follow-up statements
074
WGUS56 KHNX 010018
FFWHNX
CAC029-010130-
/O.EXT.KHNX.FF.W.0014.000000T0000Z-210801T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Joaquin Valley CA
518 PM PDT Sat Jul 31 2021
The National Weather Service in Hanford CA has extended the
* Flash Flood Warning for...
Northeastern Kern County in central California...
* Until 630 PM PDT.
* At 512 PM PDT, Doppler radar indicated additional thunderstorms
producing heavy rain moving into the warning area. Between one to
one and a half inches of rain has already fallen over the last
hour. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, highways, as well
as other drainage and low lying areas.
* Some locations that will experience flooding include...
Onyx and state route 178 east of of Onyx.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3575 11810 3571 11805 3568 11805 3562 11811
3563 11817 3568 11818 3572 11816 3574 11814
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...one half to one inches IN the next hour.
$$
CMc209
WGUS76 KHNX 010121
FFSHNX
Flash Flood Statement
National Weather Service San Joaquin Valley CA
621 PM PDT Sat Jul 31 2021
CAC029-010130-
/O.EXP.KHNX.FF.W.0014.000000T0000Z-210801T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kern CA-
621 PM PDT Sat Jul 31 2021
...THE FLASH FLOOD WARNING FOR NORTHEASTERN KERN COUNTY WILL EXPIRE
AT 630 PM PDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3575 11810 3571 11805 3568 11805 3562 11811
3563 11817 3568 11818 3572 11816 3574 11814
$$
CMcThe office that day
Everything else NWS Hanford, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 12:59 PM PDT | Special Weather Statement | HNX | Mariposa | 46 min |
| Jul 31, 2:01 PM PDT | Special Weather Statement | HNX | Madera | 44 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.