Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 245, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Aug 10, 2021, 6:22 PM CDT for Cimarron County, Texas County, Oklahoma. It was in force for 28 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 10, 2021, 6:22 PM CDT (23:22 UTC)
- Expired
- Aug 10, 2021, 6:50 PM CDT
- In force
- 28 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cimarron County, OK, Texas County, OK
The radar
The Amarillo radar (KAMA), 168 km from the middle of the area, began a volume at 23:25 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
Amarillo Airport, TX (KAMA), 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
- 564 J/kg
- Mixed-layer CIN
- -303 J/kg
- Mixed-layer LCL
- 1975 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
254
WUUS54 KAMA 102322
SVRAMA
OKC025-139-110015-
/O.NEW.KAMA.SV.W.0245.210810T2322Z-210811T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
622 PM CDT Tue Aug 10 2021
The National Weather Service in Amarillo has issued a
* Severe Thunderstorm Warning for...
Western Texas County in the Panhandle of Oklahoma...
Southeastern Cimarron County in the Panhandle of Oklahoma...
* Until 715 PM CDT.
* At 621 PM CDT, a severe thunderstorm was located 4 miles northwest
of Griggs, or 18 miles east of Boise City, moving northeast at 10
mph. Another severe thunderstorm was located 1 mile east of
Griggs, moving northeast at 10 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to roofs, siding, and trees is possible.
* Locations impacted include...
Texhoma, Eva, Griggs and Sturgis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3688 10176 3650 10171 3650 10222 3663 10233
3698 10208
TIME...MOT...LOC 2321Z 222DEG 10KT 3663 10219
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
LG3 follow-up statements
712
WWUS54 KAMA 102335
SVSAMA
Severe Weather Statement
National Weather Service Amarillo TX
635 PM CDT Tue Aug 10 2021
OKC025-139-110015-
/O.CON.KAMA.SV.W.0245.000000T0000Z-210811T0015Z/
Texas OK-Cimarron OK-
635 PM CDT Tue Aug 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR SOUTHWESTERN TEXAS AND SOUTHEASTERN CIMARRON COUNTIES...
At 635 PM CDT, a severe thunderstorm was located 4 miles northeast of
Griggs, or 20 miles north of Stratford, moving northeast at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to roofs, siding, and trees is possible.
Locations impacted include...
Texhoma, Eva, Griggs and Sturgis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3688 10176 3650 10171 3650 10222 3663 10233
3690 10212
TIME...MOT...LOC 2335Z 230DEG 13KT 3663 10204
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
LG981
WWUS54 KAMA 102341
SVSAMA
Severe Weather Statement
National Weather Service Amarillo TX
641 PM CDT Tue Aug 10 2021
OKC025-139-110015-
/O.CON.KAMA.SV.W.0245.000000T0000Z-210811T0015Z/
Texas OK-Cimarron OK-
641 PM CDT Tue Aug 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR SOUTHWESTERN TEXAS AND SOUTHEASTERN CIMARRON COUNTIES...
At 640 PM CDT, a severe thunderstorm was located 5 miles northeast of
Griggs, or 21 miles north of Stratford, moving northeast at 10 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Minor damage to roofs, siding, and trees is possible.
Locations impacted include...
Texhoma, Eva and Griggs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3688 10176 3650 10171 3650 10222 3665 10228
3682 10218
TIME...MOT...LOC 2340Z 230DEG 10KT 3664 10203
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
LG394
WWUS54 KAMA 102350
SVSAMA
Severe Weather Statement
National Weather Service Amarillo TX
650 PM CDT Tue Aug 10 2021
OKC025-139-102359-
/O.CAN.KAMA.SV.W.0245.000000T0000Z-210811T0015Z/
Texas OK-Cimarron OK-
650 PM CDT Tue Aug 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN TEXAS AND
SOUTHEASTERN CIMARRON COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with this thunderstorm.
LAT...LON 3688 10176 3650 10171 3650 10222 3665 10228
3682 10218
TIME...MOT...LOC 2349Z 222DEG 10KT 3666 10201
$$
LGThe office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 6:04 PM CDT | Special Weather Statement | AMA | Cimarron | 26 min |
| Aug 10, 6:04 PM CDT | Special Weather Statement | AMA | Cimarron | 26 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.