Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 254, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Aug 16, 2021, 12:39 PM CDT for Roberts County, Texas. It was in force for 66 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 16, 2021, 12:39 PM CDT (17:39 UTC)
- Expired
- Aug 16, 2021, 1:45 PM CDT
- In force
- 66 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Roberts County, TX
The radar
The Amarillo radar (KAMA), 89 km from the middle of the area, began a volume at 17:40 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 16, 1:08 PM CDT | TSTM WND GST 60 | 9 Nnw Pampa, TX | SPOTTER ESTIMATES A 60 MPH GUST WITH TREES BENDING NEARLY 90 DEGREES. |
| Aug 16, 1:08 PM CDT | TSTM WND GST 60 | 9 Nnw Pampa, TX | CORRECTS REPORT SOURCE FROM PREVIOUS TSTM WND GST REPORT FROM 9 NNW PAMPA. SPOTTER ESTIMATES A 60 MPH GUST WITH TREES BENDING NEARLY 90 DEGREES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 5.7 hours before the alert went out and 88 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
- 894 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
860
WUUS54 KAMA 161739
SVRAMA
TXC393-161845-
/O.NEW.KAMA.SV.W.0254.210816T1739Z-210816T1845Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
1239 PM CDT Mon Aug 16 2021
The National Weather Service in Amarillo has issued a
* Severe Thunderstorm Warning for...
Southwestern Roberts County in the Panhandle of Texas...
* Until 145 PM CDT.
* At 1239 PM CDT, a severe thunderstorm was located 12 miles north of
Pampa, moving east at 10 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Minor damage to roofs, siding, and trees is possible.
People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles.
* This severe thunderstorm will remain over mainly rural areas of
southwestern Roberts County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3564 10107 3579 10108 3590 10078 3565 10067
TIME...MOT...LOC 1739Z 255DEG 9KT 3573 10097
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MJG1 follow-up statement
892 WWUS54 KAMA 161800 SVSAMA Severe Weather Statement National Weather Service Amarillo TX 100 PM CDT Mon Aug 16 2021 TXC393-161845- /O.CON.KAMA.SV.W.0254.000000T0000Z-210816T1845Z/ Roberts TX- 100 PM CDT Mon Aug 16 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT FOR SOUTHWESTERN ROBERTS COUNTY... At 100 PM CDT, a severe thunderstorm was located 12 miles northwest of Codman, or 12 miles north of Pampa, and is nearly stationary. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Minor damage to roofs, siding, and trees is possible. This severe thunderstorm will remain over mainly rural areas of southwestern Roberts County. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3564 10107 3579 10108 3590 10078 3565 10067 TIME...MOT...LOC 1800Z 258DEG 3KT 3573 10095 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ MJG
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 7:21 AM CDT | Areal Flood Advisory | AMA | Gray, Roberts | 3 hr |
| Aug 16, 7:25 AM CDT | Special Weather Statement | AMA | Roberts | 35 min |
| Aug 16, 10:02 AM CDT | Areal Flood Advisory | AMA | Lipscomb | 118 min |
| Aug 16, 10:43 AM CDT | Special Weather Statement | AMA | Ochiltree | 32 min |
| Aug 16, 12:57 PM CDT | Special Weather Statement | AMA | Hutchinson | 33 min |
| Aug 16, 1:11 PM CDT | Tornado Warning | AMA | Roberts | 34 min |
| Aug 16, 1:28 PM CDT | Special Weather Statement | AMA | Oldham | 32 min |
| Aug 16, 1:42 PM CDT | Severe Thunderstorm Warning | AMA | Gray, Roberts | 63 min |
| Aug 16, 1:54 PM CDT | Areal Flood Advisory | AMA | Gray | 39 min |
| Aug 16, 2:09 PM CDT | Severe Thunderstorm Warning | AMA | Carson, Gray | 51 min |
| Aug 16, 2:24 PM CDT | Special Weather Statement | AMA | Moore | 36 min |
| Aug 16, 2:33 PM CDT | Flash Flood Warning | AMA | Gray, Roberts | 2 hr |
| Aug 16, 2:54 PM CDT | Severe Thunderstorm Warning | AMA | Carson, Gray | 51 min |
| Aug 16, 3:18 PM CDT | Severe Thunderstorm Warning | AMA | Donley, Gray | 57 min |
| Aug 16, 3:30 PM CDT | Areal Flood Advisory | AMA | Armstrong, Carson | 3 hr |
| Aug 16, 4:12 PM CDT | Special Weather Statement | AMA | Donley | 33 min |
| Aug 16, 4:24 PM CDT | Areal Flood Advisory | AMA | Randall | 3 hr |
| Aug 16, 4:29 PM CDT | Areal Flood Advisory | AMA | Deaf Smith, Oldham | 3 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.