Alert archive / Oklahoma / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS Norman, OK
NWS Norman, OK issued this flash flood warning at Mar 12, 2021, 6:38 PM CST for 4 counties in Oklahoma. It was in force for 3 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
- Mar 12, 2021, 6:38 PM CST (00:38 UTC)
- Expired
- Mar 12, 2021, 9:45 PM CST
- In force
- 3 hr
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Flood severity
- None
Counties Alfalfa County, OK, Garfield County, OK, Grant County, OK, Major County, OK
The radar
The Vance AFB radar (KVNX), 32 km from the middle of the area, began a volume at 00:38 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
Norman, OK (KOUN), launched 00:00Z, 0.6 hours before the alert went out and 149 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
- 910 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 646 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.2
The text
As transmitted.
516
WGUS54 KOUN 130038
FFWOUN
OKC003-047-053-093-130345-
/O.NEW.KOUN.FF.W.0001.210313T0038Z-210313T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
638 PM CST Fri Mar 12 2021
The National Weather Service in Norman has issued a
* Flash Flood Warning for...
Garfield County in northern Oklahoma...
Southern Grant County in northern Oklahoma...
Southeastern Alfalfa County in northwestern Oklahoma...
Eastern Major County in northwestern Oklahoma...
* Until 945 PM CST.
* At 638 PM CST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
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 flash flooding include...
Enid, Fairview, Helena, Waukomis, Pond Creek, Garber, Lahoma,
Ringwood, Drummond, Lamont, Cleo Springs, Kremlin, Goltry,
Breckenridge, Ames, Meno, Jet, Aline, Nash and Hunter.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3672 9812 3676 9746 3649 9747 3633 9769
3617 9793 3617 9852 3646 9853
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR AND 30 MINUTES
$$
TL2 follow-up statements
883
WGUS74 KOUN 130101
FFSOUN
Flash Flood Statement
National Weather Service Norman OK
701 PM CST Fri Mar 12 2021
OKC003-047-053-093-130345-
/O.CON.KOUN.FF.W.0001.000000T0000Z-210313T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Alfalfa OK-Garfield OK-Grant OK-Major OK-
701 PM CST Fri Mar 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM CST THIS
EVENING FOR GARFIELD, SOUTHERN GRANT, SOUTHEASTERN ALFALFA AND
EASTERN MAJOR COUNTIES...
At 701 PM CST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly...
including a risk of street flooding in Enid.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
Some locations that will experience flash flooding include...
Enid, Waukomis, Pond Creek, Garber, Lahoma, Ringwood, Drummond,
Lamont, Kremlin, Goltry, Breckenridge, Ames, Meno, Nash, Hunter,
Fairmont, Hillsdale, Carrier, Jefferson and Vance Air Force Base.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3646 9832 3672 9812 3676 9746 3675 9746
3670 9746 3649 9747 3633 9769 3617 9793
3620 9834 3643 9834
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
TL931
WGUS74 KOUN 130234
FFSOUN
Flash Flood Statement
National Weather Service Norman OK
834 PM CST Fri Mar 12 2021
OKC003-093-130244-
/O.CAN.KOUN.FF.W.0001.000000T0000Z-210313T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Alfalfa OK-Major OK-
834 PM CST Fri Mar 12 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN ALFALFA AND
EASTERN MAJOR COUNTIES...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
A Flood Watch remains in effect until 600 AM CST Saturday for
portions of central Oklahoma and northern Oklahoma.
LAT...LON 3659 9811 3671 9811 3676 9746 3675 9746
3665 9746 3649 9747 3633 9769 3617 9793
3620 9810 3643 9810 3644 9810 3649 9810
3650 9810 3651 9810 3659 9810
$$
OKC047-053-130345-
/O.CON.KOUN.FF.W.0001.000000T0000Z-210313T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield OK-Grant OK-
834 PM CST Fri Mar 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM CST THIS
EVENING FOR GARFIELD AND SOUTHERN GRANT COUNTIES...
At 834 PM CST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 3 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
Some locations that will experience flash flooding include...
Enid, Waukomis, Pond Creek, Garber, Lahoma, Drummond, Lamont,
Kremlin, Breckenridge, Nash, Hunter, Fairmont, Hillsdale, Carrier,
Jefferson, Vance Air Force Base, Bison and North Enid.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3659 9811 3671 9811 3676 9746 3675 9746
3665 9746 3649 9747 3633 9769 3617 9793
3620 9810 3643 9810 3644 9810 3649 9810
3650 9810 3651 9810 3659 9810
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1 INCH IN 1 HOUR
$$
TLThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 6:15 PM CST | Areal Flood Advisory | OUN | Alfalfa, Blaine, Dewey, Garfield, Grant, Major | 3 hr |
| Mar 12, 6:18 PM CST | Special Weather Statement | OUN | Custer | 42 min |
| Mar 12, 6:33 PM CST | Special Weather Statement | OUN | Washita | 27 min |
| Mar 12, 6:45 PM CST | Special Weather Statement | OUN | Blaine | 45 min |
| Mar 12, 7:05 PM CST | Special Weather Statement | OUN | Kay | 25 min |
| Mar 12, 7:18 PM CST | Areal Flood Advisory | OUN | Kay, Noble | 3 hr |
| Mar 12, 7:31 PM CST | Special Weather Statement | OUN | Blaine | 29 min |
| Mar 12, 7:35 PM CST | Areal Flood Advisory | OUN | Custer | 3 hr |
| Mar 12, 8:00 PM CST | Special Weather Statement | OUN | Blaine | 30 min |
| Mar 12, 8:07 PM CST | Severe Thunderstorm Warning | OUN | Blaine, Custer, Kingfisher | 38 min |
| Mar 12, 8:40 PM CST | Special Weather Statement | OUN | Noble | 35 min |
| Mar 12, 8:42 PM CST | Severe Thunderstorm Warning | OUN | Blaine, Kingfisher | 48 min |
| Mar 12, 9:26 PM CST | Severe Thunderstorm Warning | OUN | Kingfisher | 34 min |
| Mar 13, 1:19 AM CST | Special Weather Statement | OUN | Harmon | 26 min |
| Mar 13, 1:41 AM CST | Special Weather Statement | OUN | Harmon | 49 min |
| Mar 13, 2:31 AM CST | Special Weather Statement | OUN | Jackson | 29 min |
| Mar 13, 4:42 AM CST | Dense Fog Advisory | OUN | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 22 more | 7 hr |
| Mar 13, 7:54 AM CST | River Flood Advisory | OUN | Blaine, Canadian | 13 hr |
| Mar 13, 12:02 PM CST | Dense Fog Advisory | OUN | Alfalfa, Harper, Woods | 118 min |
| Mar 13, 2:08 PM CST | River Flood Advisory | OUN | Blaine, Caddo, Canadian, Custer | 39 hr |
Nearby
Flash Flood Warnings in Oklahoma, 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.