Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 21, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Mar 18, 2020, 6:22 PM CDT for Jackson County, Kiowa County, Tillman County, Oklahoma. It was in force for 38 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
- Mar 18, 2020, 6:22 PM CDT (23:22 UTC)
- Expired
- Mar 18, 2020, 7:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Jackson County, OK, Kiowa County, OK, Tillman County, OK
The radar
The Altus AFB radar (KFDR), 35 km from the middle of the area, began a volume at 23:21 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 |
|---|---|---|---|
| Mar 18, 4:42 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.4 hours before the alert went out and 168 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
- 5 J/kg
- Mixed-layer CIN
- -276 J/kg
- Mixed-layer LCL
- 631 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 285 m²/s²
- 0-3 km storm-relative helicity
- 301 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
748
WUUS54 KOUN 182322
SVROUN
OKC065-075-141-190000-
/O.NEW.KOUN.SV.W.0021.200318T2322Z-200319T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
622 PM CDT Wed Mar 18 2020
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Northeastern Jackson County in southwestern Oklahoma...
South central Kiowa County in southwestern Oklahoma...
Northwestern Tillman County in southwestern Oklahoma...
* Until 700 PM CDT.
* At 622 PM CDT, a severe thunderstorm was located 4 miles south of
Headrick, moving north at 25 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...
Snyder, Mountain Park, Headrick, Friendship, Humphreys, Altus Air
Force Base and Tom Steed Reservoir.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3453 9902 3450 9926 3472 9928 3479 9917
3481 9914 3473 9892
TIME...MOT...LOC 2322Z 182DEG 20KT 3457 9916
HAIL...1.00IN
WIND...60MPH
$$
Mahale2 follow-up statements
987
WWUS54 KOUN 182337
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
637 PM CDT Wed Mar 18 2020
OKC065-075-141-190000-
/O.CON.KOUN.SV.W.0021.000000T0000Z-200319T0000Z/
Jackson OK-Kiowa OK-Tillman OK-
637 PM CDT Wed Mar 18 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR NORTHEASTERN JACKSON...SOUTH CENTRAL KIOWA AND NORTHWESTERN
TILLMAN COUNTIES...
At 636 PM CDT, a severe thunderstorm was located near Headrick,
moving north at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Snyder, Mountain Park, Headrick, Friendship and Tom Steed Reservoir.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3461 9898 3456 9921 3472 9928 3479 9917
3481 9914 3473 9892
TIME...MOT...LOC 2336Z 184DEG 20KT 3464 9913
HAIL...1.00IN
WIND...60MPH
$$
Mahale371
WWUS54 KOUN 182356
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
656 PM CDT Wed Mar 18 2020
OKC065-075-141-190006-
/O.EXP.KOUN.SV.W.0021.000000T0000Z-200319T0000Z/
Jackson OK-Kiowa OK-Tillman OK-
656 PM CDT Wed Mar 18 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JACKSON...SOUTH
CENTRAL KIOWA AND NORTHWESTERN TILLMAN COUNTIES WILL EXPIRE AT 700 PM
CDT...
The storm which prompted the warning has weakened below severe
limits, therefore the warning will be allowed to expire. However
small hail and gusty winds are still possible with this thunderstorm.
LAT...LON 3461 9898 3456 9921 3472 9928 3479 9917
3481 9914 3473 9892
TIME...MOT...LOC 2356Z 182DEG 20KT 3475 9913
$$
MahaleThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 1:10 AM CDT | Dense Fog Advisory | OUN | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 27 more | 9 hr |
| Mar 18, 7:20 AM CDT | River Flood Warning | OUN | Pottawatomie, Seminole | 103 min |
| Mar 18, 8:57 AM CDT | River Flood Warning | OUN | Bryan | 36 hr |
| Mar 18, 10:05 AM CDT | Flood Watch | OUN | Atoka, Bryan, Carter, Cleveland, Coal, Garvin and 12 more | 32 hr |
| Mar 18, 1:43 PM CDT | Wind Advisory | OUN | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 23 more | 41 hr |
| Mar 18, 5:50 PM CDT | Special Weather Statement | OUN | Grady | 25 min |
| Mar 18, 6:08 PM CDT | Special Weather Statement | OUN | Jackson | 37 min |
| Mar 18, 6:12 PM CDT | Special Weather Statement | OUN | Jackson | 33 min |
| Mar 18, 6:44 PM CDT | Severe Thunderstorm Warning | OUN | Jackson | 46 min |
| Mar 18, 6:45 PM CDT | Special Weather Statement | OUN | Comanche | 30 min |
| Mar 18, 6:57 PM CDT | Special Weather Statement | OUN | Kiowa | 33 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2020Every severe thunderstorm warning in 2020
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.