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 Jul 21, 2021, 8:11 PM CDT for Llano County, Texas. It was in force for 34 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
- Jul 21, 2021, 8:11 PM CDT (01:11 UTC)
- Expired
- Jul 21, 2021, 8:45 PM CDT
- In force
- 34 min
- Issued by
- NWS Austin/San Antonio, TX
County Llano County, TX
The radar
The Ft Hood radar (KGRK), 111 km from the middle of the area, began a volume at 01:13 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 00:00Z, 1.2 hours before the alert went out and 257 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
- 144 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1882 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
976 WWUS84 KEWX 220111 SPSEWX Special Weather Statement National Weather Service Austin/San Antonio TX 811 PM CDT Wed Jul 21 2021 TXZ171-220145- Llano TX- 811 PM CDT Wed Jul 21 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LLANO COUNTY UNTIL 845 PM CDT... At 810 PM CDT, Doppler radar was tracking a strong thunderstorm over Stolz, or near Llano. This storm was nearly stationary. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Bluffton, Stolz, Lone Grove and Tow. 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. && LAT...LON 3071 9847 3071 9862 3087 9868 3089 9846 TIME...MOT...LOC 0110Z 172DEG 2KT 3076 9857 $$ RUNYEN
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:21 PM CDT | Special Weather Statement | EWX | Atascosa | 24 min |
| Jul 21, 7:29 PM CDT | Areal Flood Advisory | EWX | Atascosa, Karnes | 2 hr |
| Jul 21, 8:01 PM CDT | Areal Flood Advisory | EWX | Llano | 3 hr |
| Jul 21, 9:36 PM CDT | Areal Flood Advisory | EWX | Llano | 114 min |
| Jul 22, 3:20 PM CDT | Special Weather Statement | EWX | Comal, Guadalupe | 25 min |
| Jul 22, 3:51 PM CDT | Special Weather Statement | EWX | Atascosa | 24 min |
| Jul 22, 3:55 PM CDT | Special Weather Statement | EWX | Hays | 35 min |
| Jul 22, 4:15 PM CDT | Special Weather Statement | EWX | Bexar, Wilson | 45 min |
| Jul 22, 4:17 PM CDT | Special Weather Statement | EWX | Hays | 28 min |
| Jul 22, 4:22 PM CDT | Special Weather Statement | EWX | Atascosa | 53 min |
| Jul 22, 4:42 PM CDT | Special Weather Statement | EWX | Travis | 33 min |
| Jul 22, 4:51 PM CDT | Special Weather Statement | EWX | Uvalde | 39 min |
| Jul 22, 4:58 PM CDT | Special Weather Statement | EWX | Bexar | 47 min |
| Jul 22, 5:12 PM CDT | Special Weather Statement | EWX | DeWitt | 33 min |
| Jul 22, 5:18 PM CDT | Special Weather Statement | EWX | Frio, Guadalupe, Wilson | 42 min |
| Jul 22, 5:28 PM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, Wilson | 3 hr |
| Jul 22, 5:42 PM CDT | Special Weather Statement | EWX | Gonzales | 48 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.