Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 15, NWS Hanford, CA
NWS Hanford, CA issued this flash flood warning at Aug 14, 2021, 4:57 PM PDT for Tulare County, California. It was in force for 82 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
- Aug 14, 2021, 4:57 PM PDT (23:57 UTC)
- Expired
- Aug 14, 2021, 6:19 PM PDT
- In force
- 82 min
- Issued by
- NWS Hanford, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Tulare County, CA
The radar
The San Joaquin Valley radar (KHNX), 105 km from the middle of the area, began a volume at 23:58 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, 12.0 hours before the alert went out and 250 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
- 1425 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
465
WGUS56 KHNX 142357
FFWHNX
CAC107-150130-
/O.NEW.KHNX.FF.W.0015.210814T2357Z-210815T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Joaquin Valley CA
457 PM PDT Sat Aug 14 2021
The National Weather Service in Hanford CA has issued a
* Flash Flood Warning for...
East central Tulare County in central California...
* Until 630 PM PDT.
* At 454 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 in and around the
SQF COMPLEX BURN AREA.
SOURCE...Radar indicated.
IMPACT...Flooding of areas in and around the SQF COMPLEX BURN
AREA.
The debris flow can consist of rock, mud, vegetation and other
loose materials.
* Some locations that will experience flooding include...
Kern Canyon Ranger Station.
ESPECIALLY VULNERABLE LOCATIONS INCLUDE: Severely burned areas in
steep terrain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall can cause extensive and severe flash flooding of
creeks and streams. Debris flows may also be anticipated across
roads. Roadways and bridges may be washed away in places. Stay off
the roads in the warned area. If you encounter flood waters...climb
to safety.
Move away from recently burned areas. Life-threatening flooding of
creeks, roads and normally dry arroyos is likely. The heavy rains
will likely trigger rockslides, mudslides and debris flows in steep
terrain, especially in and around these areas.
&&
LAT...LON 3626 11862 3625 11848 3651 11841 3628 11838
3628 11831 3611 11832 3610 11840 3622 11862
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
KM2 follow-up statements
936
WGUS76 KHNX 150008
FFSHNX
Flash Flood Statement
National Weather Service San Joaquin Valley CA
508 PM PDT Sat Aug 14 2021
CAC107-150130-
/O.CON.KHNX.FF.W.0015.000000T0000Z-210815T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tulare CA-
508 PM PDT Sat Aug 14 2021
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT FOR
EAST CENTRAL TULARE COUNTY...
At 503 PM PDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms moving west at 5 mph
in and around the SQF COMPLEX BURNED AREA.
SOURCE...Radar indicated.
IMPACT...Flooding of areas in and around the SQF COMPLEX BURN AREA.
The debris flow can consist of rock, mud, vegetation and other loose
materials.
Some locations that will experience flooding include...
Kern Canyon Ranger Station.
ESPECIALLY VULNERABLE LOCATIONS INCLUDE: Severely burned areas in
steep terrain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move away from recently burned areas. The heavy rains may trigger
rockslides, mudslides and debris flows in steep terrain, especially
in and around these areas.
Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3626 11862 3625 11848 3651 11841 3628 11838
3628 11831 3611 11832 3610 11840 3622 11862
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
KM461
WGUS76 KHNX 150119
FFSHNX
Flash Flood Statement
National Weather Service San Joaquin Valley CA
619 PM PDT Sat Aug 14 2021
CAC107-150127-
/O.CAN.KHNX.FF.W.0015.000000T0000Z-210815T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tulare CA-
619 PM PDT Sat Aug 14 2021
...THE FLASH FLOOD WARNING FOR EAST CENTRAL TULARE COUNTY IS
CANCELLED...
The thunderstorms have ended, although be aware that there may be
some standing water in the area.
LAT...LON 3626 11862 3625 11848 3651 11841 3628 11838
3628 11831 3611 11832 3610 11840 3622 11862
$$
KMNearby
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.