Alert archive / Texas / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 39, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 21, 2014, 4:17 PM CDT for Burnet County, Llano County, Texas. It was in force for 43 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 21, 2014, 4:17 PM CDT (21:17 UTC)
- Expired
- Apr 21, 2014, 5:00 PM CDT
- In force
- 43 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
Counties Burnet County, TX, Llano County, TX
The radar
The Ft Hood radar (KGRK), 109 km from the middle of the area, began a volume at 21:17 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 21, 4:25 PM CDT | HAIL 1.25 | 2 S Llano, TX | |
| Apr 21, 4:26 PM CDT | HAIL 0.75 | 1 Sse Llano, TX |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 21, 2:52 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 9.3 hours before the alert went out and 265 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
- 113 J/kg
- Mixed-layer CIN
- -117 J/kg
- Mixed-layer LCL
- 648 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
773 WUUS54 KEWX 212117 SVREWX TXC053-299-212200- /O.NEW.KEWX.SV.W.0039.140421T2117Z-140421T2200Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 417 PM CDT MON APR 21 2014 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL BURNET COUNTY... EASTERN LLANO COUNTY... * UNTIL 500 PM CDT. * AT 413 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR LLANO...AND MOVING SOUTHEAST AT 15 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE GAINESVILLE...KINGSLAND AND INKS LAKE STATE PARK. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT MONDAY EVENING FOR SOUTH CENTRAL TEXAS. && LAT...LON 3071 9835 3052 9848 3068 9876 3084 9865 TIME...MOT...LOC 2117Z 297DEG 15KT 3072 9859 $$
1 follow-up statement
629 WWUS54 KEWX 212134 SVSEWX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 434 PM CDT MON APR 21 2014 TXC053-299-212200- /O.CON.KEWX.SV.W.0039.000000T0000Z-140421T2200Z/ LLANO TX-BURNET TX- 434 PM CDT MON APR 21 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR WEST CENTRAL BURNET AND EASTERN LLANO COUNTIES... AT 428 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM LLANO TO 6 MILES SOUTHEAST OF LLANO...MOVING SOUTHEAST AT 15 MPH. VERY HEAVY RAINS UP TO ONE INCH ARE ALSO EXPECTED OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GAINESVILLE...KINGSLAND AND INKS LAKE STATE PARK PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT MONDAY EVENING FOR SOUTH CENTRAL TEXAS. && LAT...LON 3071 9835 3052 9848 3068 9876 3084 9865 TIME...MOT...LOC 2133Z 297DEG 15KT 3077 9857 3066 9861 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 3:26 PM CDT | Special Weather Statement | EWX | Llano | 34 min |
| Apr 21, 4:10 PM CDT | Special Weather Statement | EWX | Llano | 35 min |
| Apr 21, 5:01 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Burnet, Llano | 59 min |
| Apr 21, 5:11 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 49 min |
| Apr 21, 5:31 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 29 min |
| Apr 21, 5:58 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie, Llano | 62 min |
| Apr 21, 6:05 PM CDT | Areal Flood Advisory | EWX | Llano | 115 min |
| Apr 21, 6:29 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie, Llano | 61 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2014Every severe thunderstorm warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.