Alert archive / Oklahoma / Flash Flood Warnings in 2021
Flash Flood Warning 39, NWS Norman, OK
NWS Norman, OK issued this flash flood warning at Jun 28, 2021, 8:55 PM CDT for Cleveland County, McClain County, Oklahoma County, Oklahoma. It was in force for 3 hr. 2 reports 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
- Jun 28, 2021, 8:55 PM CDT (01:55 UTC)
- Expired
- Jun 29, 2021, 12:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cleveland County, OK, McClain County, OK, Oklahoma County, OK
The radar
The Norman radar (KTLX), 26 km from the middle of the area, began a volume at 01:54 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 |
|---|---|---|---|
| Jun 28, 9:20 PM CDT | FLASH FLOOD | 3 Nnw Goldsby, OK | RETENTION POND DAM FAILURE CAUSED BRIEF FLASH FLOOD OVER 24TH AND LAMAR NEAR RIVERWIND. |
| Jun 28, 10:00 PM CDT | FLOOD | Norman, OK | NEIGHBORHOOD STREETS WITH SEVERAL INCHES OF WATER ACROSS THE ROAD, SOME SPOTS WITH CLOSE TO 6 INCHES OF STANDING WATER OVER THE ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 1.9 hours before the alert went out and 281 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
- 9 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 986 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
796
WGUS54 KOUN 290155
FFWOUN
OKC027-087-109-290500-
/O.NEW.KOUN.FF.W.0039.210629T0155Z-210629T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
855 PM CDT Mon Jun 28 2021
The National Weather Service in Norman has issued a
* Flash Flood Warning for...
Cleveland County in central Oklahoma...
Northwestern McClain County in central Oklahoma...
Oklahoma County in central Oklahoma...
* Until midnight CDT.
* At 855 PM CDT, 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...
Oklahoma City, Norman, Edmond, Moore, Midwest City, Del City,
Newcastle, Blanchard, Purcell, Bethany, Choctaw, Warr Acres, The
Village, Noble, Harrah, Slaughterville, Spencer, Nichols Hills,
Jones and Nicoma Park.
This includes the following highways...
Interstate 35 between mile markers 96 and 146.
Interstate 44 between mile markers 102 and 151.
Interstate 40 between mile markers 142 and 172.
Interstate 240 between mile markers 1 and 16.
Additional rainfall amounts of 1 to 2 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.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 3572 9767 3572 9715 3511 9715 3504 9732
3504 9735 3504 9767 3507 9767 3511 9767
3519 9767 3534 9767 3538 9767 3543 9767
3544 9767 3554 9767 3570 9767
FLASH FLOOD...RADAR INDICATED
$$
TL1 follow-up statement
651
WGUS74 KOUN 290337
FFSOUN
Flash Flood Statement
National Weather Service Norman OK
1037 PM CDT Mon Jun 28 2021
OKC027-087-109-290500-
/O.CON.KOUN.FF.W.0039.000000T0000Z-210629T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cleveland OK-McClain OK-Oklahoma OK-
1037 PM CDT Mon Jun 28 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT TONIGHT
FOR CLEVELAND, NORTHWESTERN MCCLAIN AND OKLAHOMA COUNTIES...
At 1037 PM CDT, Doppler radar indicated showers and thunderstorms
producing persistent moderate rain across the warned area. Between 1
and 2 inches of rain have fallen.
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...
Oklahoma City, Norman, Edmond, Moore, Midwest City, Del City,
Newcastle, Blanchard, Purcell, Bethany, Choctaw, Warr Acres, The
Village, Noble, Harrah, Slaughterville, Spencer, Nichols Hills,
Jones and Nicoma Park.
This includes the following highways...
Interstate 35 between mile markers 96 and 146.
Interstate 44 between mile markers 102 and 151.
Interstate 40 between mile markers 142 and 172.
Interstate 240 between mile markers 1 and 16.
Additional rainfall amounts of 1 to 2 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.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 3572 9767 3572 9715 3511 9715 3504 9732
3504 9735 3504 9767 3507 9767 3511 9767
3519 9767 3534 9767 3538 9767 3543 9767
3544 9767 3554 9767 3570 9767
FLASH FLOOD...RADAR INDICATED
$$
TLThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 8:30 PM CDT | Areal Flood Advisory | OUN | Canadian, Cleveland, Grady, Kingfisher, Lincoln, Logan and 4 more | 4 hr |
| Jun 28, 9:05 PM CDT | Areal Flood Advisory | OUN | Hughes, Seminole | 3 hr |
| Jun 28, 9:44 PM CDT | Flash Flood Warning | OUN | Lincoln, Pottawatomie | 6 hr |
| Jun 28, 11:21 PM CDT | River Flood Warning | OUN | Payne | 15 hr |
| Jun 28, 11:38 PM CDT | River Flood Advisory | OUN | Lincoln, Oklahoma, Pottawatomie | 21 hr |
| Jun 29, 12:48 AM CDT | Areal Flood Advisory | OUN | Payne | 3 hr |
| Jun 29, 7:34 AM CDT | Areal Flood Warning | OUN | Lincoln, Payne, Pottawatomie, Seminole | 18 hr |
| Jun 29, 7:44 AM CDT | Areal Flood Warning | OUN | Caddo, Comanche, Kiowa, Tillman | 11 hr |
| Jun 29, 8:09 AM CDT | River Flood Advisory | OUN | Kingfisher, Logan | 24 hr |
| Jun 29, 8:31 AM CDT | River Flood Advisory | OUN | Blaine, Caddo, Canadian, Custer | 29 hr |
| Jun 29, 8:39 AM CDT | River Flood Advisory | OUN | Garvin | 25 hr |
| Jun 29, 10:58 AM CDT | Areal Flood Warning | OUN | Alfalfa, Blaine, Caddo, Canadian, Garfield, Grant and 2 more | 6 hr |
| Jun 29, 1:04 PM CDT | Areal Flood Advisory | OUN | Cleveland, Oklahoma | 3 hr |
| Jun 29, 1:55 PM CDT | River Flood Advisory | OUN | Payne | 19 hr |
| Jun 29, 4:23 PM CDT | Areal Flood Advisory | OUN | Cleveland, McClain, Oklahoma | 3 hr |
| Jun 29, 4:23 PM CDT | Special Weather Statement | OUN | Cleveland | 22 min |
| Jun 29, 5:03 PM CDT | Areal Flood Warning | OUN | Alfalfa, Blaine, Canadian, Garfield, Kingfisher, Major | 3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.