Alert archive / Texas / Special Weather Statements in 2021
Special Weather Statement, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this special weather statement at Apr 15, 2021, 8:12 AM CDT for Edwards County, Texas. It was in force for 48 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 15, 2021, 8:12 AM CDT (13:12 UTC)
- Expired
- Apr 15, 2021, 9:00 AM CDT
- In force
- 48 min
- Issued by
- NWS Austin/San Antonio, TX
County Edwards County, TX
The radar
The Laughlin AFB radar (KDFX), 68 km from the middle of the area, began a volume at 13:16 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
Del Rio, TX (KDRT), launched 12:00Z, 1.2 hours before the alert went out and 44 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
- 2593 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 634 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 338 m²/s²
- Significant tornado parameter
- 4.6
- Supercell composite
- 21.4
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 15, 6:06 AM CDT, 2 hours 6 minutes earlier.
Area forecast discussion, Apr 15, 6:06 AM CDT, 2 hours 6 minutes before
Area Forecast Discussion National Weather Service Austin/San Antonio TX 606 AM CDT Thu Apr 15 2021 .AVIATION... CIGs will fall to IFR in the next hour at all sites with TEMPOs of LIFR and restrictions to VSBY this morning. SHRA/TSRA are currently developing at or in the VCNTY of all sites and have maintained -SHRA and/or VCTS/VCSH. CIGs rise to MVFR this afternoon, then fall back to IFR this evening, then LIFR tonight with BR developing. NE-E winds of 5 to 13 KTs become SE at KDRT this afternoon and at the I-35 sites tonight. Just beyond this TAF period, a dryline passes the sites. CIGs erode to VFR and winds become NW at KDRT late Friday morning and at the I-35 sites Friday afternoon. && .PREV DISCUSSION... /ISSUED 314 AM CDT Thu Apr 15 2021/ SHORT TERM (Today through Friday)... Showers and thunderstorms will develop along the Rio Grande into the Edwards Plateau as upward forcing increases ahead of a mid level impulse early this morning and continue into late morning. Elevated instability with MUCAPE of 1000 to 1500 J/Kg and lapse rates of 7 C/km suggest a few storms may become strong to severe with large hail the main threat. Another mid level impulse moves across Texas this afternoon bringing showers and thunderstorms to the Hill Country and our Central Texas counties due to upward forcing. In addition, a thunderstorm or two may come off the Serranias del Burro and cross the Rio Grande later this afternoon. Elevated instability increases to 1500 to 2000 J/kg and lapse rates near 8 C/km with bulk shear of 60+ KTs and SRH of 150 m2/s2. These values continue the potential of strong to severe storms for midday into the afternoon. Large hail remains the main threat with damaging wind gusts also possible. Much cooler and below normal temperatures are expected due to cold advection with the front to our south underneath multiple layers of thick clouds along with areas of rain. As an upper level trough moves over the Central Rockies, the front moves back north tonight into early Friday morning. Warm advection will generate chances of showers with weaker elevated instability allowing for slight chances of thunderstorms tonight. The upper level trough moves across the Central Plains on Friday dragging a dryline into our western areas late morning into afternoon and a cold front possibly into the northern Hill Country and our Central Texas counties late afternoon into evening. Upward forcing from these features along with instability brings chances of showers and thunderstorms. There is a potential of strong thunderstorms over our Central Texas counties in the afternoon. Temperatures will warm to above normal behind the dryline with well above normal Rio Grande Plains due to downsloping flow. A drier airmass with possibly breezy flow may generate elevated fire weather conditions across Val Verde county into western parts of Edwards and Kinney counties as humidities fall into the teens and 20s in the afternoon. However, this is may be tempered somewhat due to any significant wetting rains today into early Friday. LONG TERM (Friday Night through Wednesday)... Frontal passage continues into Friday night into Saturday morning. Breezy northerly winds will advect in cooler and drier air leaving temperatures for Saturday in the 60s across most of the region, well below normal. Chances for some overrunning showers stay in the forecast Saturday, with better chances in our southern counties and Coastal Plains. Sunday carries a drier forecast but with the cold airmass still in place, temperatures remain well below normal. Monday begins the warming trend and normal temps will be reached by Wednesday. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 72 64 83 53 64 / 50 40 70 20 30 Austin Bergstrom Intl Airport 73 63 83 53 65 / 50 40 70 20 30 New Braunfels Muni Airport 75 65 85 55 67 / 40 30 50 20 30 Burnet Muni Airport 69 62 81 49 62 / 60 50 60 20 20 Del Rio Intl Airport 80 68 91 57 68 / 60 20 10 20 30 Georgetown Muni Airport 71 63 79 51 63 / 60 50 70 20 20 Hondo Muni Airport 77 66 89 55 69 / 50 20 20 20 30 San Marcos Muni Airport 73 63 83 53 66 / 40 30 60 20 30 La Grange - Fayette Regional 75 67 81 56 67 / 30 30 70 30 30 San Antonio Intl Airport 74 65 85 56 67 / 40 30 40 20 30 Stinson Muni Airport 75 67 86 57 68 / 40 20 40 20 30 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && Short-Term/Aviation...04 Long-Term...YB
Hazardous weather outlook, Apr 15, 3:30 AM CDT, 4 hours 42 minutes before
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 330 AM CDT Thu Apr 15 2021 TXZ171>173-183>194-202>209-217>225-228-160830- 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 Thu Apr 15 2021 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...Today And Tonight. A few strong to severe thunderstorms are possible across much of South Central Texas today into early this evening. The greatest threat area is along and northwest of a Del Rio to San Antonio to Austin line. The main threat will be large hail, although damaging winds are also possible. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Isolated strong thunderstorms are possible across our Central Texas counties on Friday with hail and gusty winds possible. Elevated fire weather conditions are possible across Val Verde and western parts of Edwards and Kinney counties Friday afternoon due to low humidities and breezy winds. No hazardous weather is expected Saturday through Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
In the hours before
Special weather statement, Apr 15, 7:34 AM CDT, 38 minutes before
Special Weather Statement
National Weather Service Austin/San Antonio TX
734 AM CDT Thu Apr 15 2021
TXZ183-202-151315-
Kinney TX-Val Verde TX-
734 AM CDT Thu Apr 15 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN KINNEY AND
SOUTHEASTERN VAL VERDE COUNTIES UNTIL 815 AM CDT...
At 733 AM CDT, Doppler radar was tracking a strong thunderstorm near
Del Rio, moving east at 20 mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Del Rio, Lake View, Amanda, Laughlin AFB, Val Verde Park, Standart,
Cienegas Terrace, Long Point, 277 South Boat Ramp, 277 North
Campground, San Pedro Canyon, Escondido Estates, and Lake Ridge
Ranch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 2950 10097 2961 10054 2931 10050 2932 10092
2935 10095
TIME...MOT...LOC 1233Z 262DEG 18KT 2942 10088
BFSpecial weather statement, Apr 15, 8:12 AM CDT, 0 minutes before
Special Weather Statement National Weather Service Austin/San Antonio TX 812 AM CDT Thu Apr 15 2021 TXZ183-184-151400- Val Verde TX-Edwards TX- 812 AM CDT Thu Apr 15 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN EDWARDS AND EAST CENTRAL VAL VERDE COUNTIES UNTIL 900 AM CDT... At 811 AM CDT, Doppler radar was tracking a strong thunderstorm 8 miles west of Carta Valley, or 11 miles south of Loma Alta, moving east at 20 mph. Nickel size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Carta Valley. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && LAT...LON 2965 10087 2983 10090 2995 10052 2967 10046 TIME...MOT...LOC 1311Z 262DEG 18KT 2976 10081 BF
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 7:34 AM CDT | Special Weather Statement | EWX | Kinney | 41 min |
| Apr 15, 8:14 AM CDT | Special Weather Statement | EWX | Kinney | 46 min |
| Apr 15, 8:31 AM CDT | Severe Thunderstorm Warning | EWX | Edwards, Val Verde | 59 min |
| Apr 15, 8:40 AM CDT | Severe Thunderstorm Warning | EWX | Kinney | 65 min |
| Apr 15, 8:55 AM CDT | Special Weather Statement | EWX | Edwards | 50 min |
| Apr 15, 9:04 AM CDT | Severe Thunderstorm Warning | EWX | Edwards | 24 min |
| Apr 15, 9:32 AM CDT | Severe Thunderstorm Warning | EWX | Edwards | 17 min |
| Apr 15, 9:42 AM CDT | Severe Thunderstorm Warning | EWX | Kinney, Uvalde | 63 min |
| Apr 15, 10:42 AM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 45 min |
| Apr 15, 12:15 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie, Llano | 60 min |
| Apr 15, 1:07 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Burnet, Llano, Travis | 53 min |
| Apr 15, 1:52 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Williamson | 36 min |
| Apr 15, 2:07 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Williamson | 40 min |
| Apr 15, 2:57 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Llano | 63 min |
| Apr 15, 3:21 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Williamson | 54 min |
| Apr 15, 3:56 PM CDT | Severe Thunderstorm Warning | EWX | Travis, Williamson | 49 min |
| Apr 15, 4:11 PM CDT | Special Weather Statement | EWX | Williamson | 49 min |
| Apr 15, 4:36 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Lee, Travis, Williamson | 54 min |
| Apr 15, 5:22 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Fayette, Lee | 29 min |
Nearby
Special Weather Statements in Texas, 2021Every special weather statement in 2021
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.