Alert archive / Texas / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 135, NWS Fort Worth, TX
NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 21, 2017, 5:49 PM CDT for Montague County, Texas. It was in force for 56 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
- Apr 21, 2017, 5:49 PM CDT (22:49 UTC)
- Expired
- Apr 21, 2017, 6:45 PM CDT
- In force
- 56 min
- Issued by
- NWS Fort Worth, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Montague County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 129 km from the middle of the area, began a volume at 22:50 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 |
|---|---|---|---|
| Apr 21, 4:40 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 10.8 hours before the alert went out and 102 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
- 106 J/kg
- Mixed-layer CIN
- -396 J/kg
- Mixed-layer LCL
- 1056 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 21, 3:55 PM CDT, 1 hour 54 minutes earlier.
Area forecast discussion, Apr 21, 3:55 PM CDT, 1 hour 54 minutes before
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</html>Hazardous weather outlook, Apr 21, 3:24 PM CDT, 2 hours 25 minutes before
Hazardous Weather Outlook National Weather Service Fort Worth TX 324 PM CDT Fri Apr 21 2017 TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-221145- Montague-Cooke-Grayson-Fannin-Lamar-Young-Jack-Wise-Denton-Collin- Hunt-Delta-Hopkins-Stephens-Palo Pinto-Parker-Tarrant-Dallas- Rockwall-Kaufman-Van Zandt-Rains-Eastland-Erath-Hood-Somervell- Johnson-Ellis-Henderson-Comanche-Mills-Hamilton-Bosque-Hill-Navarro- Freestone-Anderson-Lampasas-Coryell-Bell-McLennan-Falls-Limestone- Leon-Milam-Robertson- 219 PM CDT Fri Apr 21 2017 This Hazardous Weather Outlook is for North and Central Texas. .DAY ONE...Through Tonight. There is a good chance of thunderstorms mainly along and east of US 281 and north of I-20 through 7 PM. Sufficient amounts of instability and wind shear are in place for severe thunderstorms capable of large hail and damaging winds. The tornado threat appears low at this time, but any storms that are isolated or interact with any type of outflow boundaries may have a tornado threat. The risk for severe weather will spread southward through the I-20 corridor to a Comanche to Athens line during the evening hours. The main hazards with thunderstorms will be damaging winds and hail. Brief periods of heavy rain may result in isolated instances of flooding. Thunderstorms will continue beyond midnight through daybreak Saturday across portions of East and Central Texas. The severe weather threat should diminish, but a few strong to near severe storms will be capable of producing gusty winds, hail and heavy rain. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. There will be a threat for thunderstorms on Thursday and Thursday night. Instability and wind shear will be in place to support the threat for strong to severe thunderstorms. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed late this afternoon and evening for areas near and north of the I-20 corridor. Additional spotter activation may be requested south of I-20 between 9 PM and daybreak Saturday.
In the hours before
Local storm report, Apr 21, 12:52 PM CDT, 4 hours 57 minutes before
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</html>The office that day
Everything else NWS Fort Worth, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 2:06 AM CDT | Severe Thunderstorm Warning | FWD | Montague | 54 min |
| Apr 21, 2:39 AM CDT | Severe Thunderstorm Warning | FWD | Montague | 51 min |
| Apr 21, 3:19 AM CDT | Severe Thunderstorm Warning | FWD | Cooke | 22 min |
| Apr 21, 6:34 PM CDT | Severe Thunderstorm Warning | FWD | Cooke, Montague | 56 min |
| Apr 21, 6:57 PM CDT | Special Weather Statement | FWD | Wise | 48 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.