Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 366, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 7, 2021, 4:16 PM CDT for Garfield County, Grant County, Oklahoma. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 7, 2021, 4:16 PM CDT (21:16 UTC)
- Expired
- Jul 7, 2021, 5:15 PM CDT
- In force
- 59 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Garfield County, OK, Grant County, OK
The radar
The Vance AFB radar (KVNX), 34 km from the middle of the area, began a volume at 21:18 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
Dodge City, (KDDC), launched 12:00Z, 9.3 hours before the alert went out and 228 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
- 58 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 975 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- -42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
849
WUUS54 KOUN 072116
SVROUN
OKC047-053-072215-
/O.NEW.KOUN.SV.W.0366.210707T2116Z-210707T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
416 PM CDT Wed Jul 7 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Southwestern Grant County in northern Oklahoma...
Northwestern Garfield County in northern Oklahoma...
* Until 515 PM CDT.
* At 416 PM CDT, severe thunderstorms were located along a line
extending from 6 miles east of Pond Creek to 6 miles east of Nash,
moving south at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Pond Creek, Kremlin, Hunter, Hillsdale and Jefferson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 3652 9757 3652 9807 3673 9803 3674 9766
TIME...MOT...LOC 2116Z 356DEG 7KT 3667 9768 3667 9794
HAIL...1.00IN
WIND...60MPH
$$
032 follow-up statements
206
WWUS54 KOUN 072139
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
439 PM CDT Wed Jul 7 2021
OKC047-053-072215-
/O.CON.KOUN.SV.W.0366.000000T0000Z-210707T2215Z/
Grant OK-Garfield OK-
439 PM CDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHWESTERN GRANT AND NORTHWESTERN GARFIELD COUNTIES...
At 438 PM CDT, a severe thunderstorm was located near Kremlin, moving
south at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Pond Creek, Kremlin, Hunter and Hillsdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3652 9757 3652 9807 3673 9803 3669 9770
TIME...MOT...LOC 2138Z 346DEG 12KT 3659 9786
HAIL...1.00IN
WIND...60MPH
$$
03319
WWUS54 KOUN 072209
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
509 PM CDT Wed Jul 7 2021
OKC047-053-072219-
/O.EXP.KOUN.SV.W.0366.000000T0000Z-210707T2215Z/
Grant OK-Garfield OK-
509 PM CDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GRANT AND
NORTHWESTERN GARFIELD COUNTIES WILL EXPIRE AT 515 PM CDT...
The storm which prompted the warning has weakened below severe
limits, therefore the warning will be allowed to expire. However
gusty winds and heavy rain are still possible with this thunderstorm.
LAT...LON 3652 9757 3652 9807 3673 9803 3669 9770
TIME...MOT...LOC 2209Z 356DEG 7KT 3653 9786
$$
BunkerThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 1:10 PM CDT | Special Weather Statement | OUN | Kay | 35 min |
| Jul 7, 1:30 PM CDT | Special Weather Statement | OUN | Noble | 15 min |
| Jul 7, 1:47 PM CDT | Special Weather Statement | OUN | Noble | 28 min |
| Jul 7, 2:16 PM CDT | Special Weather Statement | OUN | Garfield | 29 min |
| Jul 7, 3:26 PM CDT | Special Weather Statement | OUN | Alfalfa | 34 min |
| Jul 7, 3:38 PM CDT | Special Weather Statement | OUN | Canadian | 37 min |
| Jul 7, 3:43 PM CDT | Special Weather Statement | OUN | Kay | 47 min |
| Jul 7, 3:49 PM CDT | Special Weather Statement | OUN | Alfalfa | 41 min |
| Jul 7, 3:55 PM CDT | Special Weather Statement | OUN | Grant | 50 min |
| Jul 7, 3:58 PM CDT | Special Weather Statement | OUN | Oklahoma | 47 min |
| Jul 7, 4:43 PM CDT | Special Weather Statement | OUN | Major | 47 min |
| Jul 7, 4:48 PM CDT | Special Weather Statement | OUN | Garfield | 42 min |
| Jul 7, 5:02 PM CDT | Special Weather Statement | OUN | Major | 43 min |
| Jul 7, 5:07 PM CDT | Areal Flood Advisory | OUN | Garfield, Grant | 3 hr |
| Jul 7, 5:22 PM CDT | Special Weather Statement | OUN | Garfield | 23 min |
| Jul 7, 5:29 PM CDT | Special Weather Statement | OUN | Cleveland | 31 min |
| Jul 7, 5:39 PM CDT | Areal Flood Advisory | OUN | Garfield | 3 hr |
| Jul 7, 5:40 PM CDT | Special Weather Statement | OUN | Blaine | 50 min |
| Jul 7, 5:51 PM CDT | Flash Flood Warning | OUN | Garfield | 3 hr |
| Jul 7, 5:54 PM CDT | Special Weather Statement | OUN | Blaine, Custer, Dewey | 36 min |
| Jul 7, 6:00 PM CDT | Special Weather Statement | OUN | Murray | 30 min |
| Jul 7, 6:16 PM CDT | Special Weather Statement | OUN | Comanche | 44 min |
| Jul 7, 6:27 PM CDT | Special Weather Statement | OUN | Roger Mills | 33 min |
| Jul 7, 6:47 PM CDT | Special Weather Statement | OUN | Custer | 43 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2021Every severe thunderstorm 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.