Alert archive / Texas / Areal Flood Advisories in 2021

Areal Flood Advisory 248, NWS Austin/San Antonio, TX

September 6, 2021Travis County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this areal flood advisory at Sep 6, 2021, 7:50 PM CDT for Travis County, Williamson County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Sep 6, 2021, 7:50 PM CDT (00:50 UTC)
Expired: Sep 6, 2021, 11:00 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

Counties Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 39 km from the middle of the area, began a volume at 00:52 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 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 Sep 6, 6:33 PM CDT, 1 hour 17 minutes earlier.

Area forecast discussion, Sep 6, 6:33 PM CDT, 1 hour 17 minutes before

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Hazardous weather outlook, Sep 6, 4:02 AM CDT, 15 hours 48 minutes before

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
402 AM CDT Mon Sep 6 2021

TXZ171>173-183>194-202>209-217>225-228-070915-
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-
402 AM CDT Mon Sep 6 2021

This Hazardous Weather Outlook is for South-Central Texas..

.DAY ONE...Today And Tonight.

Isolated to scattered showers and thunderstorms are expected
Monday afternoon into evening. The stronger storms could produce
locally heavy downpours and wind gusts to 50 mph.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Special weather statement, Sep 6, 4:24 PM CDT, 3 hours 26 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
424 PM CDT Mon Sep 6 2021

TXZ189-205-206-062215-
Comal TX-Bexar TX-Kendall TX-
424 PM CDT Mon Sep 6 2021

...A strong thunderstorm will impact portions of central Kendall,
northwestern Bexar and west central Comal Counties through 515 PM
CDT...

At 424 PM CDT, Doppler radar was tracking a strong thunderstorm near
Kreutzberg, or 10 miles northeast of Boerne, moving south at 10 mph.

HAZARD...Wind gusts of 50 to 55 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Boerne, Fair Oaks Ranch, Bulverde, Cross Mountain, Walnut Grove,
Guadalupe River State Park, Kendalia, Sisterdale, Kreutzberg,
Welfare, Nelson City, Bergheim, Spring Branch, Cascade Caverns,
Crown, Scenic Oaks and Honey Creek State Natural Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 2995 9843 2985 9841 2963 9869 2979 9884
      3002 9875 3002 9848
TIME...MOT...LOC 2124Z 006DEG 9KT 2992 9864

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...55 MPH

MO

Special weather statement, Sep 6, 4:35 PM CDT, 3 hours 15 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
435 PM CDT Mon Sep 6 2021

TXZ183>185-187-202>204-218-219-062230-
Frio TX-Uvalde TX-Kinney TX-Medina TX-Val Verde TX-Edwards TX-
Real TX-Bandera TX-Zavala TX-
435 PM CDT Mon Sep 6 2021

...Strong thunderstorms will impact portions of Medina, southern
Bandera, Kinney, Uvalde, northern Zavala, northwestern Frio,
southwestern Edwards, east central Val Verde and Real Counties
through 530 PM CDT...

At 435 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Hondo to 8 miles northwest of Knippa to
Loma Alta. Movement was south at 30 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Uvalde, Hondo, Brackettville, Rocksprings, Bandera, Leakey, La Pryor,
Tarpley, Vanderpool, Loma Alta, Batesville, Sabinal, Camp Wood,
Moore, Laguna, D'Hanis, Tuff, Bandera Falls, Concan and Dunlay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3016 10078 2969 9894 2897 9903 2893 9990
      2905 10011 2909 10012 2909 10018 2960 10110
TIME...MOT...LOC 2135Z 013DEG 27KT 2939 9913 2936 9976 2993 10078

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

MO

Special weather statement, Sep 6, 4:39 PM CDT, 3 hours 11 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
439 PM CDT Mon Sep 6 2021

TXZ204-205-220-062245-
Atascosa TX-Bexar TX-Medina TX-
439 PM CDT Mon Sep 6 2021

...Strong thunderstorms will impact portions of east central Medina,
northwestern Atascosa and western Bexar Counties through 545 PM
CDT...

At 439 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Helotes to near Stinson Municipal Airport.
Movement was south at 20 mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
San Antonio, Castroville, San Antonio Int Airport, Stinson Municipal
Airport, Leon Valley, Helotes, Kirby, Alamo Heights, Terrell Hills,
Shavano Park, Hollywood Park, Cross Mountain, Lytle, Olmos Park,
Somerset, Natalia, China Grove, Lacoste, Noonan and The Dominion.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2925 9900 2906 9853 2942 9834 2973 9859
      2947 9896
TIME...MOT...LOC 2139Z 021DEG 16KT 2961 9870 2940 9844

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

MO

Special weather statement, Sep 6, 5:02 PM CDT, 2 hours 48 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
502 PM CDT Mon Sep 6 2021

TXZ190-191-206-062300-
Comal TX-Blanco TX-Hays TX-
502 PM CDT Mon Sep 6 2021

...A strong thunderstorm will impact portions of west central Hays,
southwestern Blanco and north central Comal Counties through 600 PM
CDT...

At 502 PM CDT, Doppler radar was tracking a strong thunderstorm near
Woodcreek, or 7 miles northwest of Wimberley, moving west at 10 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Dripping Springs, Blanco, Canyon Lake, Woodcreek, Twin Sisters,
Fischer, Payton, Spring Branch and Mount Gainor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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 3020 9809 3005 9806 2989 9840 2993 9842
      2994 9842 3014 9852
TIME...MOT...LOC 2202Z 074DEG 9KT 3008 9814

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

MO

Special weather statement, Sep 6, 5:06 PM CDT, 2 hours 44 minutes before

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Special weather statement, Sep 6, 5:35 PM CDT, 2 hours 15 minutes before

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The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 7, 3:49 PM CDT	Special Weather Statement	EWX	Uvalde	41 min
Sep 7, 3:59 PM CDT	Special Weather Statement	EWX	Real	61 min

Nearby

Areal Flood Advisories in Texas, 2021 Every 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; radar from the NEXRAD Level II archive.