Alert archive / Texas / Special Weather Statements in 2017
Special Weather Statement, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this special weather statement at May 11, 2017, 5:00 PM CDT for Travis County, Texas. It was in force for 45 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
- May 11, 2017, 5:00 PM CDT (22:00 UTC)
- Expired
- May 11, 2017, 5:45 PM CDT
- In force
- 45 min
- Issued by
- NWS Austin/San Antonio, TX
County Travis County, TX
The radar
The Ft Hood radar (KGRK), 60 km from the middle of the area, began a volume at 22:01 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 nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 10.0 hours before the alert went out and 284 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1665 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Austin/San Antonio, TX wrote its last area forecast discussion before this special weather statement went out at May 11, 2:48 PM CDT, 2 hours 12 minutes earlier.
Area forecast discussion, May 11, 2:48 PM CDT, 2 hours 12 minutes before
Area Forecast Discussion National Weather Service Austin/San Antonio TX 248 PM CDT Thu May 11 2017 .SHORT TERM (Tonight through Friday Night)... Scattered showers and isolated thunderstorms are ongoing across parts of South Central Texas east of a dryline extending from Mason to Eagle Pass. An upper level trough will move east across the Central/Southern Plains dragging the dryline a little further east this evening, before a cold front overtakes it during the overnight hours. Upward forcing ahead of these features will keep showers and thunderstorms in the forecast this evening into the overnight hours. The best moisture, instability and dynamics will be this afternoon into evening resulting in the highest POPs. Still some potential for strong to severe storms especially along and east of Highway 281 where CAPES of near 2000 J/Kg and 0-6 KM shear of 40 KTs reside. Have issued a Severe Thunderstorm Watch for Lee County until 10 PM CDT. However, cloud cover may serve to maintain a cap to inhibit deeper convection. Moisture will decrease overnight as the front moves through and go only slight chances POPs along and east of I-35. For Friday into Friday night, ridging at the surface and aloft builds into our area as the upper level trough moves away. A drier airmass results in cooler nights, though minimal cold advection allows for near normal daytime temperatures. && .LONG TERM (Saturday through Thursday)... Upper level ridging drifts over our area as a long wave upper level trough moves into the western states while the surface ridge moves off to the east this weekend. Moisture slowly returns bringing warmer low temperatures. Sufficient moisture and upslope flow will generate isolated showers and thunderstorms over the Serranias del Burro in the afternoons, however, steering flow will keep them west of our area. The trough remains over the western states next week as short wave troughs rotate through it with a moist lower to mid level flow over our area. Expect periods of showers and thunderstorms near the Rio Grande on Monday due to storms coming off the Serranias del Burro and areawide Tuesday through Thursday from the short waves and possible dryline intrusions. It will feel muggy with dewpoints in the upper 60s to lower 70s much of the week. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 64 85 61 86 62 / 40 0 0 0 0 Austin Bergstrom Intl Airport 64 84 59 86 60 / 40 0 0 0 0 New Braunfels Muni Airport 64 85 59 88 61 / 30 0 0 0 0 Burnet Muni Airport 60 82 57 84 60 / 10 0 0 0 0 Del Rio Intl Airport 63 87 62 90 66 / - 0 0 0 0 Georgetown Muni Airport 62 83 58 84 61 / 20 0 0 0 0 Hondo Muni Airport 63 88 58 89 60 / 10 0 0 0 0 San Marcos Muni Airport 64 85 59 86 60 / 40 0 0 0 0 La Grange - Fayette Regional 67 85 60 85 62 / 50 - 0 0 0 San Antonio Intl Airport 65 86 62 88 63 / 20 0 0 0 0 Stinson Muni Airport 66 87 62 90 63 / 20 0 0 0 0 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && Mesoscale/Aviation...TB3 Synoptic/Grids...04 Public Service/Data Collection...Treadway
Hazardous weather outlook, May 11, 4:32 AM CDT, 12 hours 28 minutes before
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 432 AM CDT Thu May 11 2017 TXZ171>173-183>194-202>209-217>225-228-120945- Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera- Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde- Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Maverick-Zavala- Frio-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-Dimmit- 432 AM CDT Thu May 11 2017 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...Today And Tonight. Strong thunderstorms will be possible today for areas mainly east of the Interstate 35 corridor this afternoon and evening. Hail and damaging winds will be the main threat. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
In the hours before
Special weather statement, May 11, 5:00 PM CDT, 0 minutes before
Special Weather Statement National Weather Service Austin/San Antonio TX 500 PM CDT THU MAY 11 2017 TXZ173-192-112245- Williamson TX-Travis TX- 500 PM CDT THU MAY 11 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL WILLIAMSON AND CENTRAL TRAVIS COUNTIES UNTIL 545 PM CDT... At 500 PM CDT, Doppler radar was tracking a strong thunderstorm over Barton Creek, or near Tanglewood Forest, moving northeast at 45 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Austin, Round Rock, Pflugerville, Anderson Mill, Windemere, Manor, Bee Cave, West Lake Hills, Rollingwood, Barton Creek, Shady Hollow, Sunset Valley, Brushy Creek, Wells Branch, Jollyville, Camp Mabry and Lost Creek. LAT...LON 3017 9788 3027 9802 3056 9770 3040 9747 TIME...MOT...LOC 2200Z 231DEG 40KT 3027 9788 BMW
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:33 PM CDT | Special Weather Statement | EWX | Kinney | 42 min |
| May 10, 7:34 PM CDT | Special Weather Statement | EWX | Kinney | 41 min |
| May 10, 7:38 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Val Verde | 52 min |
| May 10, 8:19 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 41 min |
| May 10, 8:58 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Uvalde | 47 min |
| May 10, 9:43 PM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 40 min |
| May 10, 10:21 PM CDT | Special Weather Statement | EWX | Val Verde | 39 min |
| May 10, 10:35 PM CDT | Tornado Warning | EWX | Val Verde | 40 min |
| May 10, 11:13 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Kinney, Val Verde | 47 min |
| May 11, 5:05 PM CDT | Severe Thunderstorm Warning | EWX | Travis, Williamson | 40 min |
| May 11, 5:40 PM CDT | Special Weather Statement | EWX | Williamson | 35 min |
| May 11, 6:17 PM CDT | Special Weather Statement | EWX | Williamson | 43 min |
| May 11, 6:51 PM CDT | Special Weather Statement | EWX | Lee | 39 min |
Nearby
Special Weather Statements in Texas, 2017Every special weather statement 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.