Alert archive / Oklahoma / Flash Flood Warnings in 2021
Flash Flood Warning 62, NWS Norman, OK
NWS Norman, OK issued this flash flood warning at Oct 10, 2021, 7:25 PM CDT for 6 counties in Oklahoma. It was in force for 107 min. 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
- Oct 10, 2021, 7:25 PM CDT (00:25 UTC)
- Expired
- Oct 10, 2021, 9:12 PM CDT
- In force
- 107 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Flood severity
- None
Counties Caddo County, OK, Canadian County, OK, Cleveland County, OK, Grady County, OK, McClain County, OK, Oklahoma County, OK
The radar
The Norman radar (KTLX), 31 km from the middle of the area, began a volume at 00:24 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 |
|---|---|---|---|
| Oct 10, 8:01 PM CDT | FLASH FLOOD | 3 Ssw Nichols Hills, OK | STALLED VEHICLE IN HIGH WATER. |
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 00:00Z, 0.4 hours before the alert went out and 37 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
- 1436 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1199 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 255 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 8.8
The text
As transmitted.
266
WGUS54 KOUN 110025
FFWOUN
OKC015-017-027-051-087-109-110330-
/O.NEW.KOUN.FF.W.0062.211011T0025Z-211011T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
725 PM CDT Sun Oct 10 2021
The National Weather Service in Norman has issued a
* Flash Flood Warning for...
Eastern Canadian County in central Oklahoma...
Cleveland County in central Oklahoma...
Northern Grady County in central Oklahoma...
Northwestern McClain County in central Oklahoma...
Oklahoma County in central Oklahoma...
East Central Caddo County in southwestern Oklahoma...
* Until 1030 PM CDT.
* At 725 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain approaching the metro area. The expected rainfall rate
is 1 to 3 inches in 2 hours. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Oklahoma City, Norman, Edmond, Moore, Midwest City, Del City, El
Reno, Chickasha, Newcastle, Blanchard, Yukon, Bethany, Mustang,
Choctaw, Warr Acres, The Village, Noble, Tuttle, Piedmont and
Harrah.
This includes the following highways...
Interstate 35 between mile markers 102 and 146.
Interstate 44 between mile markers 84 and 151.
Interstate 40 between mile markers 118 and 172.
Interstate 240 between mile markers 1 and 16.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3558 9808 3572 9767 3572 9734 3572 9722
3572 9720 3572 9719 3572 9718 3572 9715
3515 9715 3509 9767 3503 9812
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 2 HOURS
$$
TL1 follow-up statement
045
WGUS74 KOUN 110212
FFSOUN
Flash Flood Statement
National Weather Service Norman OK
912 PM CDT Sun Oct 10 2021
OKC015-017-027-051-087-109-110222-
/O.CAN.KOUN.FF.W.0062.000000T0000Z-211011T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Caddo OK-Canadian OK-Cleveland OK-Grady OK-McClain OK-Oklahoma OK-
912 PM CDT Sun Oct 10 2021
...FLASH FLOOD WARNING IS CANCELLED FOR EASTERN CANADIAN, CLEVELAND,
NORTHERN GRADY, NORTHWESTERN MCCLAIN, OKLAHOMA AND EAST CENTRAL
CADDO COUNTIES...
Flash flooding resulted in at least one stalled vehicle in
northwestern OKC shortly after 8:00 pm cdt. Otherwise, the heavy
rain has ended and flood waters have receded. Flooding is no longer
expected to pose a threat. Please continue to heed remaining road
closures.
A Flood Watch remains in effect until 400 AM CDT Monday for portions
of central Oklahoma and northern Oklahoma.
LAT...LON 3558 9808 3572 9767 3572 9734 3572 9722
3572 9720 3572 9719 3572 9718 3572 9715
3515 9715 3509 9767 3503 9812
$$
TLThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 10, 7:02 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Grady | 43 min |
| Oct 10, 7:05 PM CDT | Severe Thunderstorm Warning | OUN | Jefferson | 40 min |
| Oct 10, 7:18 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher, Logan, Noble, Payne | 42 min |
| Oct 10, 7:24 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Cleveland, Grady, McClain, Oklahoma | 51 min |
| Oct 10, 7:33 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Cotton, Garvin, Jefferson, Stephens | 42 min |
| Oct 10, 7:43 PM CDT | Tornado Warning | OUN | Cleveland, McClain | 47 min |
| Oct 10, 7:47 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson, Love | 28 min |
| Oct 10, 8:14 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Jefferson, Murray, Stephens | 46 min |
| Oct 10, 8:16 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, McClain, Oklahoma, Pottawatomie, Seminole | 59 min |
| Oct 10, 8:17 PM CDT | Areal Flood Advisory | OUN | Kay, Noble | 3 hr |
| Oct 10, 8:22 PM CDT | Tornado Warning | OUN | Lincoln, Oklahoma | 23 min |
| Oct 10, 8:43 PM CDT | Tornado Warning | OUN | Lincoln | 25 min |
| Oct 10, 8:53 PM CDT | Severe Thunderstorm Warning | OUN | Bryan, Carter, Johnston, Love, Marshall | 52 min |
| Oct 10, 8:56 PM CDT | Tornado Warning | OUN | Lincoln, Pottawatomie, Seminole | 34 min |
| Oct 10, 8:59 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Coal, Garvin, Johnston, Murray, Pontotoc and 1 more | 46 min |
| Oct 10, 9:03 PM CDT | Areal Flood Advisory | OUN | Cleveland, Lincoln, Oklahoma, Pottawatomie, Seminole | 3 hr |
| Oct 10, 9:17 PM CDT | Severe Thunderstorm Warning | OUN | Hughes, Lincoln, Payne, Pontotoc, Pottawatomie, Seminole | 43 min |
| Oct 10, 9:43 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Coal, Johnston, Marshall | 47 min |
| Oct 10, 9:45 PM CDT | Areal Flood Advisory | OUN | Cleveland, Lincoln, Logan, McClain, Oklahoma, Pottawatomie | 3 hr |
| Oct 10, 9:45 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Hughes, Pontotoc, Seminole | 45 min |
| Oct 10, 10:20 PM CDT | Tornado Warning | OUN | Hughes | 25 min |
| Oct 10, 10:30 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Coal | 45 min |
| Oct 10, 11:02 PM CDT | Special Weather Statement | OUN | Caddo | 28 min |
| Oct 10, 11:25 PM CDT | Special Weather Statement | OUN | Grady | 35 min |
| Oct 11, 12:14 AM CDT | Special Weather Statement | OUN | Cleveland, Logan, Oklahoma | 31 min |
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.