Alert archive / Texas / Special Weather Statements in 2018
Special Weather Statement, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this special weather statement at May 20, 2018, 3:30 PM CDT for Medina County, Texas. It was in force for 60 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 20, 2018, 3:30 PM CDT (20:30 UTC)
- Expired
- May 20, 2018, 4:30 PM CDT
- In force
- 60 min
- Issued by
- NWS Austin/San Antonio, TX
County Medina County, TX
The radar
The Laughlin AFB radar (KDFX), 85 km from the middle of the area, began a volume at 20:31 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
Del Rio, TX (KDLF), launched 12:00Z, 8.5 hours before the alert went out and 140 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
- 1390 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 732 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.8
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 20, 3:08 PM CDT, 22 minutes earlier.
Area forecast discussion, May 20, 3:08 PM CDT, 22 minutes before
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</html>Hazardous weather outlook, May 20, 12:31 PM CDT, 2 hours 59 minutes before
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 1231 PM CDT Sun May 20 2018 TXZ171>173-183>194-202>209-217>225-228-211745- 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- 1231 PM CDT Sun May 20 2018 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...This Afternoon And Tonight. Scattered showers and thunderstorms will continue to develop throughout the rest of the afternoon and through the evening hours producing locally heavy rainfall and potentially some localized flash flooding. Additionally some stronger storms could produce small hail and strong straight line winds. Hourly rainfall rates between 1 to 2 inches are possible with the strongest downpours. This could result in rainfall amounts of two to four inches with locally higher amounts over 5 inches. .DAYS TWO THROUGH SEVEN...Monday through Saturday. There is a low chance for strong to severe thunderstorms on Monday. The main concerns will be damaging winds and large hail. Otherwise, no hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
In the hours before
Local storm report, May 20, 11:37 AM CDT, 3 hours 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1137 AM CDT SUN MAY 20 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1130 AM HAIL 3 SE CYPRESS MILL 30.34N 98.22W
05/20/2018 E0.25 INCH BLANCO TX TRAINED SPOTTER
&&Special weather statement, May 20, 12:20 PM CDT, 3 hours 10 minutes before
Special Weather Statement National Weather Service Austin/San Antonio TX 1220 PM CDT SUN MAY 20 2018 TXZ183-184-202-201815- Kinney TX-Val Verde TX-Edwards TX- 1220 PM CDT SUN MAY 20 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN KINNEY... SOUTHWESTERN EDWARDS AND EAST CENTRAL VAL VERDE COUNTIES UNTIL 115 PM CDT... At 1220 PM CDT, Doppler radar was tracking a strong thunderstorm near Carta Valley, or 9 miles southeast of Loma Alta, moving southeast at 25 mph. Dime size hail and wind gusts of 50 to 55 mph will be possible with this storm. Locations impacted include... Carta Valley and U.S. Highway 377. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. Persons in campgrounds should consider seeking sturdy shelter until this storm passes. && LAT...LON 2976 10086 2997 10071 2983 10028 2949 10069 TIME...MOT...LOC 1720Z 309DEG 22KT 2984 10065 PLATT
Special weather statement, May 20, 1:03 PM CDT, 2 hours 27 minutes before
Special Weather Statement National Weather Service Austin/San Antonio TX 103 PM CDT SUN MAY 20 2018 TXZ184-202-201845- Kinney TX-Edwards TX- 103 PM CDT SUN MAY 20 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN KINNEY AND SOUTH CENTRAL EDWARDS COUNTIES UNTIL 145 PM CDT... At 102 PM CDT, Doppler radar was tracking a strong thunderstorm 8 miles north of Alamo Village, or 16 miles north of Brackettville, moving southeast at 30 mph. Dime size hail and wind gusts of 50 to 55 mph will be possible with this storm. Locations impacted include... Brackettville, Alamo Village, Fort Clark Springs and Kickapoo Cavern State Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 2954 10063 2979 10033 2966 10009 2921 10045 TIME...MOT...LOC 1802Z 309DEG 27KT 2955 10044 PLATT
Special weather statement, May 20, 3:30 PM CDT, 0 minutes before
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</html>The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 8:33 AM CDT | Tornado Warning | EWX | Williamson | 27 min |
| May 20, 10:47 AM CDT | Areal Flood Advisory | EWX | Burnet | 3 hr |
| May 20, 12:09 PM CDT | Areal Flood Advisory | EWX | Val Verde | 3 hr |
| May 20, 12:20 PM CDT | Special Weather Statement | EWX | Edwards | 55 min |
| May 20, 12:56 PM CDT | Flash Flood Warning | EWX | Edwards, Val Verde | 3 hr |
| May 20, 1:03 PM CDT | Special Weather Statement | EWX | Kinney | 42 min |
| May 20, 1:04 PM CDT | Areal Flood Advisory | EWX | Comal, Hays | 116 min |
| May 20, 1:32 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Uvalde | 58 min |
| May 20, 1:39 PM CDT | Areal Flood Advisory | EWX | Bastrop, Travis | 3 hr |
| May 20, 1:59 PM CDT | Areal Flood Advisory | EWX | Kinney | 2 hr |
| May 20, 2:31 PM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 59 min |
| May 20, 3:14 PM CDT | Areal Flood Advisory | EWX | Uvalde | 3 hr |
| May 20, 4:01 PM CDT | Areal Flood Advisory | EWX | Medina | 3 hr |
| May 20, 4:07 PM CDT | Areal Flood Advisory | EWX | DeWitt, Fayette, Gonzales, Lavaca | 3 hr |
| May 20, 5:10 PM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, Karnes, Wilson | 4 hr |
| May 20, 5:10 PM CDT | Special Weather Statement | EWX | Atascosa | 50 min |
| May 20, 5:31 PM CDT | Special Weather Statement | EWX | Bexar | 44 min |
| May 20, 5:56 PM CDT | Special Weather Statement | EWX | Atascosa, Wilson | 49 min |
Nearby
Special Weather Statements in Texas, 2018Every special weather statement in 2018
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.