Alert archive / Oklahoma / Flash Flood Warnings in 2020
Flash Flood Warning 13, NWS Norman, OK
NWS Norman, OK issued this flash flood warning at May 15, 2020, 6:04 PM CDT for 4 counties in Oklahoma; Wilbarger County, Texas. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 15, 2020, 6:04 PM CDT (23:04 UTC)
- Expired
- May 15, 2020, 9:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Flood severity
- None
Counties Comanche County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 46 km from the middle of the area, began a volume at 23:05 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 15, 6:40 PM CDT | FLASH FLOOD | Nw Altus, OK | HIGH WATER RESCUE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.1 hours before the alert went out and 169 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
- 1862 J/kg
- Mixed-layer CIN
- -241 J/kg
- Mixed-layer LCL
- 909 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 292 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
793
WGUS54 KOUN 152304
FFWOUN
OKC031-065-075-141-TXC487-160200-
/O.NEW.KOUN.FF.W.0013.200515T2304Z-200516T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
604 PM CDT Fri May 15 2020
The National Weather Service in Norman has issued a
* Flash Flood Warning for...
Northwestern Comanche County in southwestern Oklahoma...
Jackson County in southwestern Oklahoma...
Kiowa County in southwestern Oklahoma...
Northwestern Tillman County in southwestern Oklahoma...
North central Wilbarger County in northern Texas...
* Until 900 PM CDT.
* At 602 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen from near Altus to Cooperton. 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...
Altus, Snyder, Tipton, Blair, Olustee, Mountain Park, Roosevelt,
Gotebo, Manitou, Martha, Elmer, Headrick, Friendship, Cooperton,
Altus Air Force Base, Tom Steed Reservoir, Warren, Humphreys,
western Fort Sill and Wichita Mountains Wildlife Refuge.
Additional rainfall amounts of 2 to 3 inches are possible in the
warned area as heavy rainfall is expected to increase across the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3469 9948 3482 9929 3481 9925 3484 9926
3509 9888 3506 9862 3476 9864 3432 9917
3443 9955
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-3 INCHES IN 1 HOUR
$$
TL2 follow-up statements
200
WGUS74 KOUN 152348
FFSOUN
Flash Flood Statement
National Weather Service Norman OK
648 PM CDT Fri May 15 2020
OKC031-065-075-141-TXC487-160200-
/O.CON.KOUN.FF.W.0013.000000T0000Z-200516T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Comanche OK-Jackson OK-Kiowa OK-Tillman OK-Wilbarger TX-
648 PM CDT Fri May 15 2020
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
NORTHWESTERN COMANCHE...JACKSON...KIOWA...NORTHWESTERN TILLMAN AND
NORTH CENTRAL WILBARGER COUNTIES...
At 643 PM CDT, trained spotters reported a high water rescue in
northwest Altus. Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to three inches of rain have
already fallen near Tom Steed Reservoir.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Trained weather spotters.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other drainage
and low lying areas.
Additional rainfall amounts of 2 to 3 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3469 9948 3482 9929 3481 9925 3484 9926
3509 9888 3506 9862 3476 9864 3432 9917
3443 9955
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...2-3 INCHES IN 1 HOUR
$$
TL571
WGUS74 KOUN 160156
FFSOUN
Flash Flood Statement
National Weather Service Norman OK
856 PM CDT Fri May 15 2020
OKC031-065-075-141-TXC487-160203-
/O.EXP.KOUN.FF.W.0013.000000T0000Z-200516T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Comanche OK-Jackson OK-Kiowa OK-Tillman OK-Wilbarger TX-
856 PM CDT Fri May 15 2020
...THE FLASH FLOOD WARNING FOR NORTHWESTERN COMANCHE...JACKSON...
KIOWA...NORTHWESTERN TILLMAN AND NORTH CENTRAL WILBARGER COUNTIES
WILL EXPIRE AT 900 PM CDT...
Heavy rainfall and earlier flooding has receded. Flash flooding is
no longer expected to pose a threat. Please continue to heed any
remaining road closures.
LAT...LON 3469 9948 3482 9929 3481 9925 3484 9926
3509 9888 3506 9862 3476 9864 3432 9917
3443 9955
$$
TLThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 8:10 PM CDT | Special Weather Statement | OUN | Major | 35 min |
| May 14, 8:17 PM CDT | Severe Thunderstorm Warning | OUN | Major, Woods, Woodward | 43 min |
| May 14, 8:25 PM CDT | Special Weather Statement | OUN | Ellis | 35 min |
| May 14, 8:52 PM CDT | Severe Thunderstorm Warning | OUN | Major, Woods | 68 min |
| May 14, 9:04 PM CDT | Special Weather Statement | OUN | Ellis | 26 min |
| May 14, 9:10 PM CDT | Severe Thunderstorm Warning | OUN | Dewey, Ellis, Woodward | 50 min |
| May 14, 9:26 PM CDT | Special Weather Statement | OUN | Ellis | 34 min |
| May 14, 9:41 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woodward | 49 min |
| May 14, 9:51 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Major, Woods | 54 min |
| May 14, 10:19 PM CDT | Areal Flood Advisory | OUN | Major | 3 hr |
| May 14, 10:31 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Major, Woods | 59 min |
| May 14, 11:23 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Major, Woods | 52 min |
| May 15, 12:07 AM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher, Major | 32 min |
| May 15, 1:18 AM CDT | Special Weather Statement | OUN | Garfield | 27 min |
| May 15, 10:59 AM CDT | Flood Watch | OUN | Atoka, Bryan, Carter, Cleveland, Coal, Comanche and 17 more | 16 hr |
| May 15, 12:16 PM CDT | Special Weather Statement | OUN | Hughes | 29 min |
| May 15, 12:32 PM CDT | Special Weather Statement | OUN | Pottawatomie | 28 min |
| May 15, 12:41 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Pottawatomie | 49 min |
| May 15, 12:57 PM CDT | Areal Flood Advisory | OUN | Hughes, Pottawatomie, Seminole | 3 hr |
| May 15, 1:13 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, McClain, Pottawatomie | 47 min |
| May 15, 1:27 PM CDT | Special Weather Statement | OUN | Cleveland | 33 min |
| May 15, 1:38 PM CDT | Areal Flood Advisory | OUN | Cleveland, Pottawatomie | 3 hr |
| May 15, 1:40 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, McClain | 35 min |
| May 15, 2:15 PM CDT | Special Weather Statement | OUN | McClain | 30 min |
| May 15, 2:20 PM CDT | Special Weather Statement | OUN | Grady | 25 min |
| May 15, 2:21 PM CDT | Areal Flood Advisory | OUN | Cleveland, Garvin, Grady, McClain, Stephens | 114 min |
| May 15, 2:42 PM CDT | Special Weather Statement | OUN | Garvin, Grady | 33 min |
| May 15, 2:57 PM CDT | Severe Thunderstorm Warning | OUN | Grady | 33 min |
| May 15, 3:07 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Grady | 23 min |
| May 15, 3:12 PM CDT | Areal Flood Advisory | OUN | Caddo, Comanche, Grady | 63 min |
| May 15, 3:21 PM CDT | Special Weather Statement | OUN | Pontotoc | 39 min |
| May 15, 3:26 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Grady | 34 min |
| May 15, 3:31 PM CDT | Flash Flood Warning | OUN | Caddo, Comanche, Grady, Stephens | 119 min |
| May 15, 3:33 PM CDT | Special Weather Statement | OUN | Stephens | 27 min |
| May 15, 3:40 PM CDT | Special Weather Statement | OUN | Jackson | 50 min |
| May 15, 3:47 PM CDT | Special Weather Statement | OUN | Coal | 43 min |
| May 15, 3:47 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 43 min |
| May 15, 3:48 PM CDT | Special Weather Statement | OUN | Garvin | 27 min |
| May 15, 4:00 PM CDT | Special Weather Statement | OUN | Caddo | 30 min |
| May 15, 4:07 PM CDT | Special Weather Statement | OUN | Atoka | 53 min |
| May 15, 4:10 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Grady, Stephens | 35 min |
| May 15, 4:13 PM CDT | Flash Flood Warning | OUN | Carter, Garvin, Murray, Stephens | 3 hr |
| May 15, 4:15 PM CDT | River Flood Warning | OUN | Pottawatomie, Seminole | 11 hr |
| May 15, 4:17 PM CDT | Special Weather Statement | OUN | Garvin | 28 min |
| May 15, 4:22 PM CDT | Special Weather Statement | OUN | Harmon | 53 min |
| May 15, 4:28 PM CDT | Special Weather Statement | OUN | Kiowa | 17 min |
| May 15, 4:28 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Murray | 47 min |
| May 15, 4:43 PM CDT | Severe Thunderstorm Warning | OUN | Grady, Stephens | 32 min |
| May 15, 4:53 PM CDT | Special Weather Statement | OUN | Comanche | 37 min |
| May 15, 4:59 PM CDT | Severe Thunderstorm Warning | OUN | Harmon, Jackson | 61 min |
| May 15, 5:03 PM CDT | Special Weather Statement | OUN | Bryan | 42 min |
| May 15, 5:12 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Grady, Stephens | 33 min |
| May 15, 5:13 PM CDT | Special Weather Statement | OUN | Garvin | 47 min |
| May 15, 5:16 PM CDT | Severe Thunderstorm Warning | OUN | Jackson | 44 min |
| May 15, 5:18 PM CDT | Special Weather Statement | OUN | Murray | 72 min |
| May 15, 5:22 PM CDT | Special Weather Statement | OUN | Grady | 23 min |
| May 15, 5:23 PM CDT | Areal Flood Advisory | OUN | Coal, Garvin, Murray, Pontotoc, Seminole | 2 hr |
| May 15, 5:23 PM CDT | Special Weather Statement | OUN | Kiowa | 37 min |
| May 15, 5:28 PM CDT | Flash Flood Warning | OUN | Caddo, Comanche, Cotton, Garvin, Grady, Stephens | 92 min |
| May 15, 5:32 PM CDT | Areal Flood Advisory | OUN | Comanche, Jackson, Kiowa, Tillman | 118 min |
| May 15, 5:35 PM CDT | Severe Thunderstorm Warning | OUN | Caddo | 25 min |
| May 15, 5:41 PM CDT | Areal Flood Advisory | OUN | Harmon, Jackson | 2 hr |
| May 15, 5:41 PM CDT | Special Weather Statement | OUN | Caddo | 34 min |
| May 15, 5:48 PM CDT | Special Weather Statement | OUN | Tillman | 42 min |
| May 15, 5:52 PM CDT | Special Weather Statement | OUN | Stephens | 23 min |
| May 15, 5:57 PM CDT | Severe Thunderstorm Warning | OUN | Jackson, Kiowa, Tillman | 63 min |
| May 15, 5:58 PM CDT | Special Weather Statement | OUN | Stephens | 32 min |
| May 15, 6:03 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 27 min |
| May 15, 6:06 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Grady | 8 min |
| May 15, 6:12 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 63 min |
| May 15, 6:20 PM CDT | Special Weather Statement | OUN | Comanche | 25 min |
| May 15, 6:25 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 26 min |
| May 15, 6:26 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 34 min |
| May 15, 6:35 PM CDT | Severe Thunderstorm Warning | OUN | Jackson, Kiowa, Tillman | 40 min |
| May 15, 6:44 PM CDT | Flash Flood Warning | OUN | Garvin, Stephens | 91 min |
| May 15, 6:57 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Stephens | 48 min |
| May 15, 6:58 PM CDT | Severe Thunderstorm Warning | OUN | Jackson, Tillman | 77 min |
| May 15, 6:59 PM CDT | Flash Flood Warning | OUN | Caddo, Comanche, Grady, Tillman | 3 hr |
| May 15, 4:48 PM CDT | Special Weather Statement | OUN | Hardeman | 42 min |
| May 15, 5:56 PM CDT | Severe Thunderstorm Warning | OUN | Hardeman | 64 min |
Nearby
Flash Flood Warnings in Oklahoma, 2020Flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.