Alert archive / Texas / Areal Flood Advisories in 2021
Areal Flood Advisory 9, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this areal flood advisory at Apr 30, 2021, 6:52 PM CDT for Comal County, Texas. It was in force for 69 min.
The area
The counties it named.
The facts
- Issued
- Apr 30, 2021, 6:52 PM CDT (23:52 UTC)
- Expired
- Apr 30, 2021, 8:01 PM CDT
- In force
- 69 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
County Comal County, TX
The radar
The Austin/San Antonio radar (KEWX), 27 km from the middle of the area, began a volume at 23:54 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
Corpus Christi, TX (KCRP), launched 12:00Z, 11.9 hours before the alert went out and 248 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
- 63 J/kg
- Mixed-layer CIN
- -200 J/kg
- Mixed-layer LCL
- 566 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 Apr 30, 4:16 PM CDT, 2 hours 36 minutes earlier.
Area forecast discussion, Apr 30, 4:16 PM CDT, 2 hours 36 minutes before
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</html>Hazardous weather outlook, Apr 30, 3:36 AM CDT, 15 hours 16 minutes before
Hazardous Weather Outlook National Weather Service Austin/San Antonio TX 336 AM CDT Fri Apr 30 2021 TXZ171>173-183>194-202>209-217>225-228-011200- 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- 336 AM CDT Fri Apr 30 2021 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...Today And Tonight. Numerous showers and scattered thunderstorms are forecast to continue today and tonight. The heaviest rainfall is expected across the Coastal Plains where accumulations could reach 2-4 inches with isolated totals in excess of 6 inches. A Flash Flood Watch is in effect for locations south and east of a Pleasanton to New Braunfels to Fayetteville line. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Numerous showers and scattered thunderstorms are forecast to continue into Saturday night. The Flash Flood Watch will remain in effect for locations south and east of a Pleasanton to New Braunfels to Fayetteville line through Saturday evening. A strong to marginally severe storm is also possible Saturday. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to submit storm or flooding reports to the National Weather Service.
In the hours before
Local storm report, Apr 30, 3:26 PM CDT, 3 hours 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
326 PM CDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0733 PM TORNADO 4 SSE HONDO 29.30N 99.10W
04/28/2021 MEDINA TX NWS STORM SURVEY
AN NWS STORM SURVEY TEAM FOUND EVIDENCE OF
AN EF1 TORNADO WITH MAX WINDS OF 110 MPH
THAT WAS ON THE GROUND FOR ALMOST 2 MILES.
PLEASE VIEW THE PUBLIC INFORMATION STATEMENT
FOR DETAILS.
&&
AATLocal storm report, Apr 30, 4:26 PM CDT, 2 hours 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
426 PM CDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0712 PM TSTM WND DMG D'HANIS 29.33N 99.29W
04/28/2021 MEDINA TX NWS STORM SURVEY
MULTIPLE TREES FROM WEST OF TOWN ALONG OLD
HWY 90 INTO TOWN WITH LARGE LIMBS DOWN OR
TRUNKS SNAPPED. OTHER DAMAGE INCLUDED
DESTRUCTION OF A SMALL METAL CAR PORT AND A
CENTER PIVOT IRRIGATION SYSTEM SLIPPED. WIND
DRIVEN HAIL ALSO CAUSED DAMAGE. WINDS WERE
ESTIMATED BETWEEN 75 AND 105 MPH ACROSS THIS
AREA.
&&
AATLocal storm report, Apr 30, 4:34 PM CDT, 2 hours 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
434 PM CDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0727 PM TSTM WND DMG 1 WNW HONDO 29.35N 99.16W
04/28/2021 MEDINA TX NWS STORM SURVEY
IN AND AROUND HONDO...IN ADDITION TO WIDE
SPREAD TREE DAMAGE AND MULTIPLE CENTER PIVOT
IRRIGATION SYSTEMS TOPPLED THERE WERE TWO
INSTANCES OF METAL BUILDINGS HAVE THEIR
LARGE DOORS BLOWN IN OR OUT...AND PARTS OF
THE METAL ROOFING BLOWN OFF A BUILDING NEAR
THE AIRPORT AMONG OTHER DAMAGE. WINDS HERE
WERE ALSO ESTIMATED AT 75-110 MPH.
&&
AATLocal storm report, Apr 30, 4:39 PM CDT, 2 hours 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
439 PM CDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0750 PM TSTM WND DMG 9 SW CASTROVILLE 29.28N 99.00W
04/28/2021 MEDINA TX NWS STORM SURVEY
EAST OF THE EF-1 TORNADO AND SOUTH OF DUNLEY
ADDITIONAL SUBSTANTIAL DAMAGE WAS FOUND. TWO
DIFFERENT SECTIONS OF POWER LINES WERE
KNOCKED DOWN...PARTIAL ROOF DAMAGE TO TWO
RESIDENCE WERE OBSERVED...AND MORE TREES HAD
LARGE LIMBS MISSING WITH CONTINUED DAMAGE TO
CENTER PIVOT IRRIGATION SYSTEMS. WIND
ESTIMATES WERE BETWEEN 80 AND 105 MPH.
&&
AATThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 3:34 AM CDT | Flash Flood Watch | EWX | Atascosa, Bandera, Bastrop, Bexar, Blanco, Caldwell and 15 more | 39 hr |
| Apr 30, 11:25 AM CDT | Areal Flood Advisory | EWX | Atascosa | 3 hr |
| Apr 30, 4:53 PM CDT | Areal Flood Advisory | EWX | Bexar | 112 min |
| Apr 30, 5:48 PM CDT | Flash Flood Warning | EWX | Bexar | 6 hr |
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.