Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 310, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at May 15, 2020, 9:12 PM CDT for Cotton County, Jefferson County, Oklahoma; Archer County, Clay County, Texas. It was in force for 36 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
- May 15, 2020, 9:12 PM CDT (02:12 UTC)
- Expired
- May 15, 2020, 9:48 PM CDT
- In force
- 36 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cotton County, OK, Jefferson County, OK, Archer County, TX, Clay County, TX
The radar
The Altus AFB radar (KFDR), 102 km from the middle of the area, began a volume at 02:11 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 |
|---|---|---|---|
| May 15, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 2.2 hours before the alert went out and 131 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
- 1748 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 1447 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.2
The text
As transmitted.
905
WUUS54 KOUN 160212
SVROUN
OKC033-067-TXC009-077-160315-
/O.NEW.KOUN.SV.W.0310.200516T0212Z-200516T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
912 PM CDT Fri May 15 2020
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Jefferson County in southern Oklahoma...
Southeastern Cotton County in southwestern Oklahoma...
Clay County in northern Texas...
Southeastern Archer County in northern Texas...
* Until 1015 PM CDT.
* At 910 PM CDT, severe thunderstorms were located along a line
extending from 3 miles west of Waurika Lake to 4 miles southeast of
Petrolia to 5 miles south of Windthorst, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...A weather observation station in Wichita Falls recorded a
60 mph wind gust at 852 PM. Numerous reports of wind
damage were also reported by trained spotters in Archer
City at 810 PM.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Henrietta, Waurika, Ryan, Petrolia, Byers, Windthorst, Terral,
Bellevue, Hastings, Addington, Sugden, Newport, Lake Arrowhead,
southern Waurika Lake, Bluegrove, Shannon, Joy and Vashti.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3345 9850 3396 9826 3429 9819 3429 9773
3386 9783 3385 9787 3388 9796 3388 9797
3389 9798 3347 9798 3347 9842 3343 9842
TIME...MOT...LOC 0210Z 274DEG 20KT 3428 9814 3395 9820 3350 9841
HAIL...1.00IN
WIND...60MPH
$$
032 follow-up statements
696
WWUS54 KOUN 160238
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
938 PM CDT Fri May 15 2020
TXC009-160248-
/O.CAN.KOUN.SV.W.0310.000000T0000Z-200516T0315Z/
Archer TX-
938 PM CDT Fri May 15 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ARCHER COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3393 9824 3423 9818 3422 9775 3386 9783
3385 9787 3388 9796 3388 9797 3389 9798
3347 9798 3347 9842
TIME...MOT...LOC 0238Z 275DEG 29KT 3426 9790 3393 9796 3348 9807
$$
OKC033-067-TXC077-160315-
/O.CON.KOUN.SV.W.0310.000000T0000Z-200516T0315Z/
Jefferson OK-Cotton OK-Clay TX-
938 PM CDT Fri May 15 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR WESTERN JEFFERSON...SOUTHEASTERN COTTON AND CLAY COUNTIES...
At 938 PM CDT, severe thunderstorms were located along a line
extending from 4 miles east of Addington to near Terral to 3 miles
west of Newport, moving east at 35 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...
Henrietta, Waurika, Ryan, Petrolia, Byers, Terral, Bellevue,
Hastings, Sugden, Newport, Bluegrove, eastern Lake Arrowhead,
Shannon, Joy and Vashti.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3393 9824 3423 9818 3422 9775 3386 9783
3385 9787 3388 9796 3388 9797 3389 9798
3347 9798 3347 9842
TIME...MOT...LOC 0238Z 275DEG 29KT 3426 9790 3393 9796 3348 9807
HAIL...1.00IN
WIND...60MPH
$$
03064
WWUS54 KOUN 160248
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
948 PM CDT Fri May 15 2020
OKC033-067-TXC077-160258-
/O.CAN.KOUN.SV.W.0310.000000T0000Z-200516T0315Z/
Jefferson OK-Cotton OK-Clay TX-
948 PM CDT Fri May 15 2020
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN JEFFERSON...
SOUTHEASTERN COTTON AND CLAY COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, therefore the warning has been cancelled. However gusty
winds and heavy rain are still possible with these thunderstorms.
LAT...LON 3393 9824 3423 9818 3422 9775 3386 9783
3385 9787 3388 9796 3388 9797 3389 9798
3347 9798 3347 9842
TIME...MOT...LOC 0245Z 274DEG 20KT 3426 9785 3393 9791 3348 9802
$$
03The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 7:08 PM CDT | Special Weather Statement | OUN | Comanche | 37 min |
| May 15, 7:33 PM CDT | Flash Flood Warning | OUN | Comanche, Cotton, Jackson, Tillman | 3 hr |
| May 15, 7:36 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Stephens | 39 min |
| May 15, 7:58 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 62 min |
| May 15, 8:15 PM CDT | Flash Flood Warning | OUN | Garvin, Stephens | 2 hr |
| May 15, 8:25 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Tillman | 65 min |
| May 15, 8:27 PM CDT | Areal Flood Advisory | OUN | Comanche, Cotton, Jefferson, Stephens | 3 hr |
| May 15, 8:35 PM CDT | Flash Flood Warning | OUN | Comanche, Cotton, Stephens | 115 min |
| May 15, 9:49 PM CDT | Special Weather Statement | OUN | Jefferson | 26 min |
| May 15, 10:27 PM CDT | River Flood Warning | OUN | Jackson, Kiowa, Tillman | 4 hr |
| May 16, 1:59 PM CDT | River Flood Warning | OUN | Bryan | 7 hr |
| May 16, 2:00 PM CDT | River Flood Warning | OUN | Atoka | 43 hr |
| May 15, 7:21 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Wilbarger | 54 min |
| May 15, 7:43 PM CDT | Tornado Warning | OUN | Archer, Baylor, Wichita, Wilbarger | 32 min |
| May 15, 8:06 PM CDT | Tornado Warning | OUN | Archer | 39 min |
| May 15, 9:32 PM CDT | Flash Flood Warning | OUN | Archer, Wichita | 88 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2020Severe Thunderstorm Warnings in Texas, 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.