Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 474, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 29, 2021, 1:26 PM CDT for Harper County, Woods County, Woodward County, Oklahoma. It was in force for 34 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
- Aug 29, 2021, 1:26 PM CDT (18:26 UTC)
- Expired
- Aug 29, 2021, 2:00 PM CDT
- In force
- 34 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Harper County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 87 km from the middle of the area, began a volume at 18:29 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, 6.4 hours before the alert went out and 121 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
- 560 J/kg
- Mixed-layer CIN
- -245 J/kg
- Mixed-layer LCL
- 1248 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 338 m²/s²
- 0-3 km storm-relative helicity
- 439 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
870
WUUS54 KOUN 291826
SVROUN
OKC059-151-153-291900-
/O.NEW.KOUN.SV.W.0474.210829T1826Z-210829T1900Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
126 PM CDT Sun Aug 29 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Northern Woods County in northwestern Oklahoma...
Northern Harper County in northwestern Oklahoma...
Northern Woodward County in northwestern Oklahoma...
* Until 200 PM CDT.
* At 126 PM CDT, severe thunderstorms were located along a line
extending from 9 miles southeast of Aetna to 6 miles northeast of
Freedom to 6 miles northeast of Rosston, moving south at 10 mph.
HAZARD...70 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Buffalo, Freedom, Rosston, Selman, Capron and Camp Houston.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3700 9855 3691 9855 3676 9891 3673 9997
3700 9998
TIME...MOT...LOC 1826Z 017DEG 7KT 3698 9885 3686 9905 3686 9983
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
WRThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 1:11 PM CDT | Special Weather Statement | OUN | Woods | 34 min |
| Aug 29, 1:57 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woods, Woodward | 48 min |
| Aug 29, 2:32 PM CDT | Areal Flood Advisory | OUN | Harper | 3 hr |
| Aug 29, 2:47 PM CDT | Special Weather Statement | OUN | Harper, Woods, Woodward | 28 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.