Alert archive / Texas / Special Weather Statements in 2020
Special Weather Statement, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this special weather statement at Apr 25, 2020, 11:13 AM CDT for 4 counties in Texas. It was in force for 47 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
- Apr 25, 2020, 11:13 AM CDT (16:13 UTC)
- Expired
- Apr 25, 2020, 12:00 PM CDT
- In force
- 47 min
- Issued by
- NWS Austin/San Antonio, TX
Counties Caldwell County, TX, Comal County, TX, Guadalupe County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 23 km from the middle of the area, began a volume at 16:16 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
Corpus Christi, TX (KCRP), launched 12:00Z, 4.2 hours before the alert went out and 210 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
- 2218 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 892 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -2.5
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 Apr 25, 6:41 AM CDT, 4 hours 32 minutes earlier.
Area forecast discussion, Apr 25, 6:41 AM CDT, 4 hours 32 minutes before
Area Forecast Discussion National Weather Service Austin/San Antonio TX 641 AM CDT Sat Apr 25 2020 .UPDATE... Please see the 12Z aviation forecast discussion below. && .AVIATION... VFR conditions are expected at area TAF sites through the current forecast period. Light northerly winds will continue for the next 1-2 hours at area TAF sites. With daytime heating and mixing, northerly winds will become gusty along the I-35 corridor. These gusty conditions will continue until 22-23Z. Winds will then decrease and remain northerly along I-35, with winds trending more east to southeast at DRT. && .PREV DISCUSSION... /ISSUED 301 AM CDT Sat Apr 25 2020/ SHORT TERM (Today through Sunday)... Surface high pressure will build across south central Texas today. This will keep the forecast dry along with temperatures very close to climatological normals for late April. We will see some gusty north winds from mid-morning through late afternoon, with winds decreasing by early evening. Clear skies, light winds and dry air will result in overnight lows in the 50s to near 60 for most areas. Surface high pressure begins to slide east of the region on Sunday, allowing low-level winds to become east to southeast. Temperatures will warm a few degrees, with highs in the 80s to near 90. LONG TERM (Sunday Night through Friday)... A mostly dry NW flow pattern aloft is expected through Thursday before an upper ridge shifts east over TX Friday. Persistent southeasterly winds Sunday night should lead to some low stratus forming Monday morning, but models have trended slightly drier to suggest more sunshine and perhaps a hastening of the warming trend. More low clouds are expected to develop Tuesday morning, and warmer min temps will translate to a warmer afternoon high temp. Shortwave activity in the NW Flow aloft will pass to the north Tuesday with a few storms expected over North Central TX Tuesday night. By Wednesday morning, the northerly flow aloft is sharpened by a low dropping south over the Central Plains, and a cold front is formed and pushed into Central Texas by 12Z. This will bring some isolated to scattered showers and storms into the I-35 corridor late Tuesday night into Wednesday. Aided by the deep northerly flow aloft, the front is expected to push out the low level moisture and leave only a tiny slip in the overall warming trend. Upper ridging begins to shift east into TX Thursday and much above normal highs are expected again by Friday. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 79 57 84 60 87 / 0 0 0 0 0 Austin Bergstrom Intl Airport 80 55 84 58 87 / - 0 0 0 0 New Braunfels Muni Airport 81 55 85 59 87 / - 0 0 0 0 Burnet Muni Airport 77 54 82 59 85 / 0 0 0 0 0 Del Rio Intl Airport 88 60 89 65 91 / 0 0 0 0 0 Georgetown Muni Airport 77 54 83 59 87 / 0 0 0 0 0 Hondo Muni Airport 86 55 88 60 90 / 0 0 0 0 0 San Marcos Muni Airport 80 55 85 58 87 / - 0 0 0 0 La Grange - Fayette Regional 81 54 86 58 87 / 10 0 0 0 0 San Antonio Intl Airport 84 57 86 61 88 / 0 0 0 0 0 Stinson Muni Airport 85 58 86 60 89 / 0 0 0 0 0 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && Short-Term/Aviation...Platt Long-Term...Oaks
Hazardous weather outlook, Apr 25, 3:30 AM CDT, 7 hours 43 minutes before
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 330 AM CDT Sat Apr 25 2020 TXZ171>173-183>194-202>209-217>225-228-260830- 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- 330 AM CDT Sat Apr 25 2020 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Elevated fire weather conditions are possible across Val Verde County Sunday afternoon due to low humidities and breezy winds. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
In the hours before
Special weather statement, Apr 25, 11:13 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service Austin/San Antonio TX
1113 AM CDT Sat Apr 25 2020
TXZ191-193-205>208-221-223-251700-
Guadalupe TX-Comal TX-Bexar TX-Caldwell TX-Bastrop TX-Gonzales TX-
Hays TX-Wilson TX-
1113 AM CDT Sat Apr 25 2020
...SIGNIFICANT WEATHER ADVISORY FOR CALDWELL...SOUTHERN HAYS...
GUADALUPE...SOUTHWESTERN BASTROP...NORTHWESTERN GONZALES...WILSON...
CENTRAL BEXAR AND COMAL COUNTIES UNTIL NOON CDT...
At 1112 AM CDT, trained weather spotters reported strong
thunderstorms along a line extending from near San Marcos to near
Stinson Municipal Airport. Movement was east at 45 mph.
Penny size hail will be possible with these storms.
Locations impacted include...
San Antonio, New Braunfels, San Marcos, Schertz, Kyle, Seguin,
Cibolo, Universal City, Live Oak, Lockhart, Selma, Floresville,
Luling, Wimberley, Stockdale, Kosciusko, Randolph AFB, Canyon Lake
Dam, Stinson Municipal Airport and Canyon Lake.
LAT...LON 2996 9727 2913 9785 2907 9794 2921 9859
3006 9821
TIME...MOT...LOC 1612Z 277DEG 40KT 2993 9799 2928 9844
KCWThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 11:17 AM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Gonzales, Guadalupe | 38 min |
| Apr 25, 11:24 AM CDT | Severe Thunderstorm Warning | EWX | Bexar, Gonzales, Guadalupe, Wilson | 51 min |
| Apr 25, 11:46 AM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Gonzales, Karnes, Wilson | 44 min |
| Apr 25, 11:58 AM CDT | Special Weather Statement | EWX | Fayette | 32 min |
| Apr 25, 12:04 PM CDT | Special Weather Statement | EWX | Caldwell, Fayette, Gonzales, Lavaca | 56 min |
| Apr 25, 12:29 PM CDT | Special Weather Statement | EWX | DeWitt | 46 min |
| Apr 25, 12:35 PM CDT | Special Weather Statement | EWX | Bastrop | 40 min |
| Apr 25, 12:53 PM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Karnes | 52 min |
| Apr 25, 12:57 PM CDT | Special Weather Statement | EWX | Fayette | 33 min |
| Apr 25, 1:11 PM CDT | Special Weather Statement | EWX | Fayette | 34 min |
Nearby
Special Weather Statements in Texas, 2020Every special weather statement in 2020
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.