Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 240, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Aug 7, 2021, 7:16 PM CDT for 4 counties in Texas. It was in force for 44 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 7, 2021, 7:16 PM CDT (00:16 UTC)
- Expired
- Aug 7, 2021, 8:00 PM CDT
- In force
- 44 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Dallam County, TX, Hartley County, TX, Moore County, TX, Sherman County, TX
The radar
The Amarillo radar (KAMA), 95 km from the middle of the area, began a volume at 00:20 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 7, 4:01 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 0.3 hours before the alert went out and 96 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
- 2016 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 2104 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
470
WUUS54 KAMA 080016
SVRAMA
TXC111-205-341-421-080100-
/O.NEW.KAMA.SV.W.0240.210808T0016Z-210808T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
716 PM CDT Sat Aug 7 2021
The National Weather Service in Amarillo has issued a
* Severe Thunderstorm Warning for...
Southwestern Sherman County in the Panhandle of Texas...
Southeastern Dallam County in the Panhandle of Texas...
Northwestern Moore County in the Panhandle of Texas...
Northeastern Hartley County in the Panhandle of Texas...
* Until 800 PM CDT.
* At 716 PM CDT, a severe thunderstorm was located 13 miles northeast
of Hartley, or 14 miles east of Dalhart, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to roofs, siding, and trees is possible.
Hail damage to vehicles is expected.
* Locations impacted include...
Dumas and Cactus.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3587 10237 3612 10239 3624 10195 3583 10194
TIME...MOT...LOC 0016Z 266DEG 16KT 3604 10225
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
LFM2 follow-up statements
378
WWUS54 KAMA 080033
SVSAMA
Severe Weather Statement
National Weather Service Amarillo TX
733 PM CDT Sat Aug 7 2021
TXC111-205-341-421-080100-
/O.CON.KAMA.SV.W.0240.000000T0000Z-210808T0100Z/
Sherman TX-Dallam TX-Moore TX-Hartley TX-
733 PM CDT Sat Aug 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTHWESTERN SHERMAN...SOUTHEASTERN DALLAM...NORTHWESTERN MOORE
AND NORTHEASTERN HARTLEY COUNTIES...
At 733 PM CDT, a severe thunderstorm was located 10 miles west of
Cactus, or 17 miles northwest of Dumas, moving east at 15 mph.
HAZARD...70 mph wind gusts and ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...Expect some tree damage. Damage is likely to mobile homes,
roofs, and outbuildings. People and animals outdoors will
be injured. Expect hail damage to roofs, siding, windows,
and vehicles.
Locations impacted include...
Dumas and Cactus.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3597 10228 3615 10229 3624 10195 3583 10194
TIME...MOT...LOC 0033Z 265DEG 14KT 3604 10219
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
LFM333
WWUS54 KAMA 080049
SVSAMA
Severe Weather Statement
National Weather Service Amarillo TX
749 PM CDT Sat Aug 7 2021
TXC111-205-080058-
/O.CAN.KAMA.SV.W.0240.000000T0000Z-210808T0100Z/
Dallam TX-Hartley TX-
749 PM CDT Sat Aug 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DALLAM AND
NORTHEASTERN HARTLEY COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
the Panhandle of Texas.
LAT...LON 3618 10216 3624 10195 3583 10194 3592 10216
TIME...MOT...LOC 0048Z 266DEG 16KT 3604 10210
$$
TXC341-421-080100-
/O.CON.KAMA.SV.W.0240.000000T0000Z-210808T0100Z/
Sherman TX-Moore TX-
749 PM CDT Sat Aug 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTHWESTERN SHERMAN AND NORTHWESTERN MOORE COUNTIES...
At 748 PM CDT, a severe thunderstorm was located 5 miles west of
Cactus, or 14 miles northwest of Dumas, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to roofs, siding, and trees is possible. Hail
damage to vehicles is expected.
Locations impacted include...
Dumas and Cactus.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3618 10216 3624 10195 3583 10194 3592 10216
TIME...MOT...LOC 0048Z 266DEG 16KT 3604 10210
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
LFMThe office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 7:04 PM CDT | Severe Thunderstorm Warning | AMA | Potter, Randall | 56 min |
| Aug 7, 7:31 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson | 33 min |
| Aug 7, 7:46 PM CDT | Special Weather Statement | AMA | Hansford, Sherman | 29 min |
| Aug 7, 8:00 PM CDT | Severe Thunderstorm Warning | AMA | Hansford, Lipscomb, Ochiltree, Sherman | 60 min |
| Aug 7, 8:02 PM CDT | Special Weather Statement | AMA | Moore | 28 min |
| Aug 7, 8:57 PM CDT | Special Weather Statement | AMA | Ochiltree | 63 min |
| Aug 7, 9:50 PM CDT | Special Weather Statement | AMA | Hutchinson | 55 min |
| Aug 7, 9:53 PM CDT | Severe Thunderstorm Warning | AMA | Hartley | 26 min |
| Aug 7, 10:09 PM CDT | Special Weather Statement | AMA | Lipscomb | 36 min |
| Aug 7, 10:22 PM CDT | Special Weather Statement | AMA | Moore | 38 min |
| Aug 7, 10:42 PM CDT | Special Weather Statement | AMA | Gray | 63 min |
| Aug 7, 10:46 PM CDT | Severe Thunderstorm Warning | AMA | Carson, Gray, Hutchinson, Roberts | 59 min |
| Aug 7, 11:24 PM CDT | Special Weather Statement | AMA | Hansford, Hutchinson | 36 min |
| Aug 7, 11:42 PM CDT | Special Weather Statement | AMA | Gray | 33 min |
| Aug 8, 12:06 AM CDT | Special Weather Statement | AMA | Carson, Roberts | 24 min |
| Aug 8, 12:29 AM CDT | Special Weather Statement | AMA | Hemphill | 46 min |
| Aug 8, 12:51 AM CDT | Special Weather Statement | AMA | Gray | 24 min |
Nearby
Severe Thunderstorm Warnings in Texas, 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.