Alert archive / Texas / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 268, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Aug 27, 2017, 10:37 PM CDT for Oldham County, Potter County, Texas. It was in force for 9 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 27, 2017, 10:37 PM CDT (03:37 UTC)
- Expired
- Aug 27, 2017, 10:46 PM CDT
- In force
- 9 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Oldham County, TX, Potter County, TX
The radar
The Amarillo radar (KAMA), 52 km from the middle of the area, began a volume at 03:37 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 27, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 3.6 hours before the alert went out and 53 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
- 670 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1915 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 27, 5:57 PM CDT, 4 hours 40 minutes earlier.
Area forecast discussion, Aug 27, 5:57 PM CDT, 4 hours 40 minutes before
Area Forecast Discussion...UPDATED National Weather Service Amarillo TX 557 PM CDT Sun Aug 27 2017 .AVIATION... A cluster of thunderstorms are expected to move south across the panhandles this evening. All TAF sites may be affected. Strong gusty winds will be possible with these storms and some of them may become severe. Low clouds and fog are expected to move in behind the storms later tonight. The low clouds and fog will start to lift by late morning. Winds will be light outside of the thunderstorms and will turn more to the north and northeast behind the cold front which will be helping to add lift for the thunderstorms. && .PREV DISCUSSION... /Issued 438 PM CDT Sun Aug 27 2017/ DISCUSSION... For tonight, a cold front will move across the OK and TX Panhandles. Sufficient moisture along with a moderately unstable atmosphere exists for this boundary to utilize. A minor upper level shortwave trof will zip southward and graze our fcst area this evening and tonight. In addition, as seen on the KAMA 18Z sounding, SBCAPE and MUCAPE values on the order of 2000 to 2500 J/kg, MLCAPE around 1000 to 1500 J/kg and DCAPE about 1200 to 1300 J/kg are evident. Fairly dry air resides at mid and upper levels of the atmosphere. Mid level lapse rates around minus 6 to minus 8 C/km along with effective shear on the order of 30 to 35 kts exists, especially across nrn and nern zones. All the above ingredients suggests a threat of tstms this evening and tonight, with the potential for some storms to become severe. Large hail to around golf ball size along with damaging winds to around 70 mph will be the main hazards. Storms should weaken late this evening. Lingering slgt chc pops were included for Monday across mainly the southern Texas Panhandle. Dry weather is then anticipated Monday night through next Sunday as northerly flow prevails around the eastern periphery of an upper level ridge of high pressure progged to anchor itself over the western states. Andrade && .AMA Watches/Warnings/Advisories... TX...None. OK...None. && 15/7
Hazardous weather outlook, Aug 27, 8:04 PM CDT, 2 hours 33 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Amarillo TX 804 PM CDT Sun Aug 27 2017 OKZ001>003-TXZ001>020-281315- Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb- Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson- Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth- 804 PM CDT Sun Aug 27 2017 This Hazardous Weather Outlook is for the Texas and Oklahoma Panhandles. .DAY ONE...Tonight. Thunderstorms are expected through tonight across parts of the Oklahoma and Texas Panhandles. Some storms that develop will have the potential to become severe, with large hail and damaging winds the primary hazards. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Thunderstorms will be possible across mainly the southern Texas Panhandle on Monday. Any storms that develop are expected to remain below severe levels at this time. .SPOTTER INFORMATION STATEMENT... Spotter groups and emergency management officials across central and sections of the Oklahoma and Texas Panhandles should remain alert and be ready for possible activation this evening.
In the hours before
Special weather statement, Aug 27, 9:57 PM CDT, 40 minutes before
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</html>Local storm report, Aug 27, 10:19 PM CDT, 18 minutes before
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</html>The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 7:30 PM CDT | Special Weather Statement | AMA | Dallam | 30 min |
| Aug 27, 8:03 PM CDT | Special Weather Statement | AMA | Dallam | 27 min |
| Aug 27, 8:16 PM CDT | Severe Thunderstorm Warning | AMA | Dallam, Hartley | 59 min |
| Aug 27, 8:30 PM CDT | Severe Thunderstorm Warning | AMA | Dallam, Sherman | 60 min |
| Aug 27, 9:16 PM CDT | Special Weather Statement | AMA | Hartley | 44 min |
| Aug 27, 9:19 PM CDT | Severe Thunderstorm Warning | AMA | Dallam, Hartley, Moore, Sherman | 56 min |
| Aug 27, 9:24 PM CDT | Severe Thunderstorm Warning | AMA | Hartley | 66 min |
| Aug 27, 9:50 PM CDT | Severe Thunderstorm Warning | AMA | Hartley, Moore, Oldham, Potter | 55 min |
| Aug 27, 9:57 PM CDT | Special Weather Statement | AMA | Hutchinson, Moore | 48 min |
| Aug 27, 10:21 PM CDT | Special Weather Statement | AMA | Oldham | 39 min |
| Aug 27, 10:32 PM CDT | Special Weather Statement | AMA | Carson, Hutchinson, Potter | 43 min |
| Aug 27, 10:36 PM CDT | Special Weather Statement | AMA | Deaf Smith, Oldham, Randall | 39 min |
| Aug 27, 7:13 PM CDT | Special Weather Statement | AMA | Cimarron | 32 min |
| Aug 27, 7:16 PM CDT | Special Weather Statement | AMA | Cimarron | 29 min |
| Aug 27, 7:25 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron, Texas | 65 min |
| Aug 27, 7:44 PM CDT | Severe Thunderstorm Warning | AMA | Texas | 46 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2017Every severe thunderstorm warning in 2017
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.