Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 769, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 13, 2019, 10:39 PM CDT for Alfalfa County, Grant County, Oklahoma. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 13, 2019, 10:39 PM CDT (03:39 UTC)
- Expired
- Aug 13, 2019, 11:30 PM CDT
- In force
- 51 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Alfalfa County, OK, Grant County, OK
The radar
The Vance AFB radar (KVNX), 7 km from the middle of the area, began a volume at 03:37 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 13, 8:59 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Dodge City, (KDDC), launched 00:00Z, 3.7 hours before the alert went out and 198 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
- 1348 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1866 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 7:24 PM CDT | Special Weather Statement | OUN | Jefferson | 21 min |
| Aug 13, 7:52 PM CDT | Severe Thunderstorm Warning | OUN | Jefferson | 23 min |
| Aug 13, 9:18 PM CDT | Special Weather Statement | OUN | Harper | 42 min |
| Aug 13, 9:45 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Dewey, Ellis, Harper, Major, Woods and 1 more | 45 min |
| Aug 13, 10:21 PM CDT | Special Weather Statement | OUN | Alfalfa, Grant | 24 min |
| Aug 13, 11:38 PM CDT | Special Weather Statement | OUN | Grant | 37 min |
| Aug 14, 1:48 AM CDT | Special Weather Statement | OUN | Love | 27 min |
| Aug 14, 2:34 AM CDT | Special Weather Statement | OUN | Carter | 56 min |
| Aug 14, 12:58 PM CDT | Special Weather Statement | OUN | Atoka | 32 min |
| Aug 14, 1:28 PM CDT | Special Weather Statement | OUN | Atoka | 32 min |
| Aug 14, 1:58 PM CDT | Special Weather Statement | OUN | Atoka | 32 min |
| Aug 14, 2:51 PM CDT | Special Weather Statement | OUN | Bryan | 24 min |
| Aug 13, 7:19 PM CDT | Special Weather Statement | OUN | Clay | 26 min |
| Aug 13, 7:41 PM CDT | Special Weather Statement | OUN | Clay | 34 min |
| Aug 14, 3:22 AM CDT | Special Weather Statement | OUN | Clay | 23 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2019Every severe thunderstorm warning in 2019
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.