Alert archive / Texas / Flash Flood Warnings in 2020

Flash Flood Warning 21, NWS Norman, OK

May 22, 2020Clay County, Texas

NWS Norman, OK issued this flash flood warning at May 22, 2020, 8:44 PM CDT for Clay County, Texas. 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
May 22, 2020, 8:44 PM CDT (01:44 UTC)
Expired
May 22, 2020, 10:45 PM CDT
In force
2 hr
Issued by
NWS Norman, OK
Area
Storm-based polygon
Flood severity
None

County Clay County, TX

The radar

The Altus AFB radar (KFDR), 116 km from the middle of the area, began a volume at 01:47 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

Fort Worth, TX (KFWD), launched 00:00Z, 1.7 hours before the alert went out and 115 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.

Skew-T log-pSkew-T log-p diagram, Fort Worth, TX at 00:00Z on 2020-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2660 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2020-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2660 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
1650 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
96 m²/s²
0-3 km storm-relative helicity
148 m²/s²
Significant tornado parameter
0.5
Supercell composite
10.6

Open this sounding in Storm Lab

The text

As transmitted.

919 
WGUS54 KOUN 230144
FFWOUN
TXC077-230345-
/O.NEW.KOUN.FF.W.0021.200523T0144Z-200523T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
844 PM CDT Fri May 22 2020

The National Weather Service in Norman has issued a

* Flash Flood Warning for...
  Southeastern Clay County in northern Texas...

* Until 1045 PM CDT.

* At 840 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have
  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...
  Bellevue, Newport, Vashti and Joy. 

Additional rainfall amounts of one to two inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

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 3368 9817 3367 9799 3347 9798 3349 9827

FLASH FLOOD...RADAR INDICATED

$$

WR

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 22, 7:13 PM CDTSevere Thunderstorm WarningOUNWichita32 min
May 22, 7:23 PM CDTTornado WarningOUNClay52 min
May 22, 7:24 PM CDTTornado WarningOUNClay36 min
May 22, 7:33 PM CDTSevere Thunderstorm WarningOUNWichita27 min
May 22, 7:41 PM CDTSevere Thunderstorm WarningOUNClay34 min
May 22, 7:42 PM CDTSevere Thunderstorm WarningOUNKnox33 min
May 22, 7:54 PM CDTSevere Thunderstorm WarningOUNClay, Wichita51 min
May 22, 7:55 PM CDTSevere Thunderstorm WarningOUNClay50 min
May 22, 8:06 PM CDTSevere Thunderstorm WarningOUNClay24 min
May 22, 8:12 PM CDTSevere Thunderstorm WarningOUNClay33 min
May 22, 8:19 PM CDTSevere Thunderstorm WarningOUNWichita26 min
May 22, 8:32 PM CDTSevere Thunderstorm WarningOUNClay43 min
May 22, 8:40 PM CDTSevere Thunderstorm WarningOUNClay50 min
May 22, 8:43 PM CDTTornado WarningOUNClay32 min
May 22, 8:46 PM CDTSevere Thunderstorm WarningOUNWichita44 min
May 22, 8:48 PM CDTSevere Thunderstorm WarningOUNWilbarger42 min
May 22, 9:15 PM CDTSevere Thunderstorm WarningOUNClay45 min
May 22, 9:17 PM CDTSevere Thunderstorm WarningOUNClay, Wichita43 min
May 22, 9:22 PM CDTSevere Thunderstorm WarningOUNArcher23 min
May 22, 9:29 PM CDTFlash Flood WarningOUNClay, Wichita7 hr
May 22, 9:30 PM CDTSevere Thunderstorm WarningOUNWichita, Wilbarger45 min
May 22, 9:40 PM CDTSevere Thunderstorm WarningOUNBaylor, Wilbarger35 min
May 22, 9:44 PM CDTSevere Thunderstorm WarningOUNArcher, Clay61 min
May 22, 10:13 PM CDTSevere Thunderstorm WarningOUNWichita, Wilbarger47 min
May 22, 10:38 PM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Wichita, Wilbarger52 min
May 22, 10:45 PM CDTFlash Flood WarningOUNClay6 hr
May 22, 10:45 PM CDTSevere Thunderstorm WarningOUNArcher, Clay45 min
May 22, 10:46 PM CDTSevere Thunderstorm WarningOUNArcher, Clay, Wichita18 min
May 22, 10:54 PM CDTSevere Thunderstorm WarningOUNWichita, Wilbarger51 min
May 22, 11:07 PM CDTFlash Flood WarningOUNWichita3 hr
May 22, 11:31 PM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Clay, Wichita, Wilbarger59 min
May 22, 11:45 PM CDTSevere Thunderstorm WarningOUNWichita, Wilbarger30 min
May 23, 12:24 AM CDTFlash Flood WarningOUNArcher, Clay3 hr
May 23, 12:31 AM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Wichita, Wilbarger59 min
May 23, 12:56 AM CDTAreal Flood AdvisoryOUNBaylor, Wilbarger3 hr
May 23, 12:57 AM CDTSevere Thunderstorm WarningOUNWilbarger33 min
May 23, 1:28 AM CDTSpecial Weather StatementOUNArcher32 min
May 23, 1:31 AM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Wichita, Wilbarger44 min
May 23, 1:41 AM CDTSevere Thunderstorm WarningOUNArcher, Clay49 min
May 23, 2:09 AM CDTAreal Flood AdvisoryOUNWilbarger3 hr
May 23, 2:13 AM CDTSevere Thunderstorm WarningOUNHardeman, Wichita, Wilbarger47 min
May 23, 3:03 AM CDTSevere Thunderstorm WarningOUNWichita, Wilbarger42 min
May 23, 3:04 AM CDTSevere Thunderstorm WarningOUNArcher, Clay16 min
May 23, 8:01 AM CDTRiver Flood WarningOUNWichita, Wilbarger72 hr

Nearby

Flash Flood Warnings in Texas, 2020Every flash flood warning in 2020

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.