Alert archive / Texas / Areal Flood Advisories in 2021
Areal Flood Advisory 43, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this areal flood advisory at May 15, 2021, 5:26 PM CDT for Uvalde County, Texas. It was in force for 94 min.
The area
The counties it named.
The facts
- Issued
- May 15, 2021, 5:26 PM CDT (22:26 UTC)
- Expired
- May 15, 2021, 7:00 PM CDT
- In force
- 94 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
County Uvalde County, TX
The radar
The Laughlin AFB radar (KDFX), 51 km from the middle of the area, began a volume at 22:28 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, 10.4 hours before the alert went out and 104 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
- 660 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 602 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 178 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory 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 areal flood advisory went out at May 15, 4:20 PM CDT, 1 hour 6 minutes earlier.
Area forecast discussion, May 15, 4:20 PM CDT, 1 hour 6 minutes before
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</html>Hazardous weather outlook, May 15, 4:42 AM CDT, 12 hours 44 minutes before
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 442 AM CDT Sat May 15 2021 TXZ171>173-183>194-202>209-217>225-228-160945- 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- 442 AM CDT Sat May 15 2021 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...Today And Tonight. There is a chance for strong to severe thunderstorms today for areas generally along and west of a Llano to Cuero line. The chance for severe weather increases slightly for areas along and west of a Kerrville to Castroville to Cotulla line. Hail and high winds are the main severe weather concerns. In addition, locally heavy rainfall is possible for areas west of a Llano to Cuero line. .DAYS TWO THROUGH SEVEN...Sunday through Friday. There is a low chance for strong to severe thunderstorms on Sunday across most of south central Texas. Hail and high winds are the main severe weather concerns. Some locally heavy downpours are also possible. For Monday through Wednesday, we could see several rounds of showers and thunderstorms across south central Texas. Strong to severe thunderstorms along with locally heavy rainfall are possible across most of the region. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
In the hours before
Local storm report, May 15, 2:57 PM CDT, 2 hours 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
257 PM CDT SAT MAY 15 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0253 PM FLASH FLOOD 2 NNE UVALDE 29.24N 99.77W
05/15/2021 UVALDE TX LAW ENFORCEMENT
LAW ENFORCEMENT REPORTED CITY STREETS
CLOSURES DUE TO FLASH FLOODING INCLUDING FM
3447 AND 2369.
&&
OBLocal storm report, May 15, 3:02 PM CDT, 2 hours 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
302 PM CDT SAT MAY 15 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0258 PM FLASH FLOOD 8 S SABINAL 29.20N 99.46W
05/15/2021 UVALDE TX LAW ENFORCEMENT
LAW ENFORCEMENT REPORTED FLASH FLOODING
OCCURRING WITH STREET CLOSURES ALONG 187
SOUTH OF SABINAL AND COYOTE RANCH RD. RAIN
GAUGE NEARBY THIS LOCATION HAS MEASURED 6.59
INCHES LAST 4 HOURS.
&&
OBSpecial weather statement, May 15, 3:31 PM CDT, 1 hour 55 minutes before
Special Weather Statement National Weather Service Austin/San Antonio TX 331 PM CDT Sat May 15 2021 TXZ220-152115- Atascosa TX- 331 PM CDT Sat May 15 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN ATASCOSA COUNTY UNTIL 415 PM CDT... At 331 PM CDT, Doppler radar was tracking a strong thunderstorm near Christine, moving northeast at 15 mph. Penny size hail will be possible with this storm. Locations impacted include... Pleasanton, Jourdanton and Christine. 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. && LAT...LON 2865 9862 2881 9872 2901 9849 2877 9830 TIME...MOT...LOC 2031Z 240DEG 12KT 2877 9860 RUNYEN
Special weather statement, May 15, 4:08 PM CDT, 1 hour 18 minutes before
Special Weather Statement
National Weather Service Austin/San Antonio TX
408 PM CDT Sat May 15 2021
TXZ220-152200-
Atascosa TX-
408 PM CDT Sat May 15 2021
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ATASCOSA COUNTY
UNTIL 500 PM CDT...
At 407 PM CDT, Doppler radar was tracking a strong thunderstorm near
Christine, moving east at 15 mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Christine, Campbellton, Peggy and Fashing.
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 2864 9834 2864 9853 2865 9856 2883 9854
2885 9815 2879 9810 2861 9833
TIME...MOT...LOC 2107Z 285DEG 14KT 2872 9844
RUNYENThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 12:20 PM CDT | Areal Flood Advisory | EWX | Uvalde | 3 hr |
| May 15, 12:55 PM CDT | Flash Flood Warning | EWX | Uvalde | 4 hr |
| May 15, 1:30 PM CDT | Flash Flood Warning | EWX | Frio, Medina, Uvalde | 4 hr |
| May 15, 3:24 PM CDT | Areal Flood Advisory | EWX | Frio, Zavala | 2 hr |
| May 15, 3:31 PM CDT | Special Weather Statement | EWX | Atascosa | 44 min |
| May 15, 3:51 PM CDT | Areal Flood Advisory | EWX | Atascosa | 3 hr |
| May 15, 4:08 PM CDT | Special Weather Statement | EWX | Atascosa | 52 min |
| May 15, 4:17 PM CDT | Areal Flood Advisory | EWX | Atascosa | 3 hr |
| May 15, 5:35 PM CDT | Areal Flood Advisory | EWX | Frio, Medina, Uvalde, Zavala | 115 min |
Nearby
Areal Flood Advisories in Texas, 2021Every areal flood advisory 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.