Alert archive / Texas / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 49, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Apr 11, 2012, 7:25 PM CDT for 4 counties in Texas. It was in force for 65 min. 4 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
- Apr 11, 2012, 7:25 PM CDT (00:25 UTC)
- Expired
- Apr 11, 2012, 8:30 PM CDT
- In force
- 65 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
Counties Deaf Smith County, TX, Oldham County, TX, Potter County, TX, Randall County, TX
The radar
The Amarillo radar (KAMA), 55 km from the middle of the area, began a volume at 00:28 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 |
|---|---|---|---|
| Apr 11, 7:45 PM CDT | HAIL 1.25 | Dawn, TX | |
| Apr 11, 7:46 PM CDT | HAIL 1 | Dawn, TX | |
| Apr 11, 8:06 PM CDT | HAIL 0.88 | 3 Sw Umbarger, TX | LOTS OF HAIL COVERING THE GROUND |
| Apr 11, 8:27 PM CDT | HAIL 1 | Umbarger, TX | HAIL COVERING HIGHWAY 60. ROADS ARE SLICK IN UMBARGER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 11, 3:11 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 0.4 hours before the alert went out and 55 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
- 706 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1480 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
790 WUUS54 KAMA 120025 SVRAMA TXC117-359-375-381-120130- /O.NEW.KAMA.SV.W.0049.120412T0025Z-120412T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AMARILLO TX 725 PM CDT WED APR 11 2012 THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN DEAF SMITH COUNTY IN THE PANHANDLE OF TEXAS EXTREME SOUTHEASTERN OLDHAM COUNTY IN THE PANHANDLE OF TEXAS EXTREME SOUTHWESTERN POTTER COUNTY IN THE PANHANDLE OF TEXAS NORTHWESTERN RANDALL COUNTY IN THE PANHANDLE OF TEXAS * UNTIL 830 PM CDT * AT 724 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR DAWN...OR ABOUT 8 MILES EAST OF HEREFORD...MOVING NORTHEAST AT 20 MPH. * LOCATIONS IMPACTED INCLUDE... DAWN... UMBARGER... BUFFALO LAKE... PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCED WARNING. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE AT 8 0 6 3 3 5 1 1 2 1. && LAT...LON 3486 10240 3519 10225 3517 10182 3474 10219 TIME...MOT...LOC 0025Z 205DEG 17KT 3485 10225 $$ CLK
6 follow-up statements
185 WWUS54 KAMA 120036 RRA SVSAMA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 736 PM CDT WED APR 11 2012 TXC117-359-375-381-120130- /O.CON.KAMA.SV.W.0049.000000T0000Z-120412T0130Z/ DEAF SMITH TX-OLDHAM TX-POTTER TX-RANDALL TX- 736 PM CDT WED APR 11 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR NORTHWESTERN RANDALL...EXTREME SOUTHWESTERN POTTER...EXTREME SOUTHEASTERN OLDHAM AND NORTHEASTERN DEAF SMITH COUNTIES... AT 735 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR DAWN...OR ABOUT 10 MILES NORTHEAST OF HEREFORD...MOVING NORTHEAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTIES. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE AT 8 0 6 3 3 5 1 1 2 1. LAT...LON 3492 10236 3519 10225 3517 10182 3478 10216 TIME...MOT...LOC 0036Z 205DEG 17KT 3489 10223 $$ CLK
143 WWUS54 KAMA 120042 SVSAMA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 742 PM CDT WED APR 11 2012 TXC117-359-375-381-120130- /O.CON.KAMA.SV.W.0049.000000T0000Z-120412T0130Z/ DEAF SMITH TX-OLDHAM TX-POTTER TX-RANDALL TX- 742 PM CDT WED APR 11 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR NORTHWESTERN RANDALL...EXTREME SOUTHWESTERN POTTER...EXTREME SOUTHEASTERN OLDHAM AND NORTHEASTERN DEAF SMITH COUNTIES... AT 738 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR DAWN...OR ABOUT 12 MILES NORTHEAST OF HEREFORD...MOVING NORTHEAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTIES. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE AT 8 0 6 3 3 5 1 1 2 1. LAT...LON 3496 10234 3519 10225 3517 10182 3478 10216 TIME...MOT...LOC 0042Z 205DEG 17KT 3491 10220 $$ CLK
191 WWUS54 KAMA 120056 SVSAMA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 756 PM CDT WED APR 11 2012 TXC117-359-375-381-120130- /O.CON.KAMA.SV.W.0049.000000T0000Z-120412T0130Z/ DEAF SMITH TX-OLDHAM TX-POTTER TX-RANDALL TX- 756 PM CDT WED APR 11 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR NORTHWESTERN RANDALL...EXTREME SOUTHWESTERN POTTER...EXTREME SOUTHEASTERN OLDHAM AND NORTHEASTERN DEAF SMITH COUNTIES... AT 756 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR UMBARGER...OR ABOUT 14 MILES WEST OF CANYON...MOVING NORTHEAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTIES. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE AT 8 0 6 3 3 5 1 1 2 1. LAT...LON 3503 10231 3519 10225 3517 10182 3479 10215 TIME...MOT...LOC 0056Z 205DEG 17KT 3497 10216 $$ CLK
337 WWUS54 KAMA 120104 SVSAMA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 804 PM CDT WED APR 11 2012 TXC117-359-375-381-120130- /O.CON.KAMA.SV.W.0049.000000T0000Z-120412T0130Z/ DEAF SMITH TX-OLDHAM TX-POTTER TX-RANDALL TX- 804 PM CDT WED APR 11 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR NORTHWESTERN RANDALL...EXTREME SOUTHWESTERN POTTER...EXTREME SOUTHEASTERN OLDHAM AND NORTHEASTERN DEAF SMITH COUNTIES... AT 803 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR DAWN...OR ABOUT 14 MILES WEST OF CANYON...MOVING NORTHEAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTIES. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE AT 8 0 6 3 3 5 1 1 2 1. LAT...LON 3503 10231 3519 10225 3517 10182 3479 10215 TIME...MOT...LOC 0104Z 205DEG 17KT 3495 10216 $$ CLK
733 WWUS54 KAMA 120118 SVSAMA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 818 PM CDT WED APR 11 2012 TXC117-359-375-120128- /O.CAN.KAMA.SV.W.0049.000000T0000Z-120412T0130Z/ DEAF SMITH TX-OLDHAM TX-POTTER TX- 818 PM CDT WED APR 11 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHWESTERN POTTER... EXTREME SOUTHEASTERN OLDHAM AND NORTHEASTERN DEAF SMITH COUNTIES IS CANCELLED... AT 818 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAD WEAKENED. THEREFORE THE SEVERE THUNDERSTORM WARNING IS CANCELLED. LAT...LON 3484 10210 3501 10216 3518 10207 3517 10182 TIME...MOT...LOC 0118Z 205DEG 17KT 3501 10213 $$ TXC381-120130- /O.CON.KAMA.SV.W.0049.000000T0000Z-120412T0130Z/ RANDALL TX- 818 PM CDT WED APR 11 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR NORTHWESTERN RANDALL COUNTY... AT 818 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR UMBARGER...OR ABOUT 12 MILES WEST OF CANYON...MOVING NORTHEAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE AT 8 0 6 3 3 5 1 1 2 1. LAT...LON 3484 10210 3501 10216 3518 10207 3517 10182 TIME...MOT...LOC 0118Z 205DEG 17KT 3501 10213 $$ CLK
242 WWUS54 KAMA 120128 SVSAMA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 828 PM CDT WED APR 11 2012 TXC381-120138- /O.EXP.KAMA.SV.W.0049.000000T0000Z-120412T0130Z/ RANDALL TX- 828 PM CDT WED APR 11 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN RANDALL COUNTY WILL EXPIRE AT 830 PM CDT... AT 828 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAD WEAKENED. THEREFORE THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3484 10210 3501 10216 3518 10207 3517 10182 TIME...MOT...LOC 0128Z 205DEG 17KT 3505 10211 $$ CLK
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 7:03 PM CDT | Severe Thunderstorm Warning | AMA | Moore, Sherman | 57 min |
| Apr 11, 7:05 PM CDT | Severe Thunderstorm Warning | AMA | Hansford, Moore, Sherman | 42 min |
| Apr 11, 7:18 PM CDT | Areal Flood Advisory | AMA | Moore, Sherman | 4 hr |
| Apr 11, 7:39 PM CDT | Tornado Warning | AMA | Carson, Hutchinson | 22 min |
| Apr 11, 8:12 PM CDT | Areal Flood Advisory | AMA | Potter, Randall | 2 hr |
| Apr 11, 8:40 PM CDT | Severe Thunderstorm Warning | AMA | Carson, Hutchinson, Moore, Potter | 38 min |
| Apr 11, 11:17 PM CDT | Areal Flood Warning | AMA | Moore | 12 hr |
| Apr 11, 11:57 PM CDT | Severe Thunderstorm Warning | AMA | Hartley, Moore | 63 min |
| Apr 12, 12:20 AM CDT | Areal Flood Advisory | AMA | Moore | 4 hr |
| Apr 12, 11:04 AM CDT | Areal Flood Warning | AMA | Moore | 8 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2012Every severe thunderstorm warning in 2012
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.