Alert archive / Texas / Flash Flood Warnings in 2018
Flash Flood Warning 1, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Mar 28, 2018, 2:40 AM CDT for Bexar County, Medina County, Texas. It was in force for 6 hr. 9 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
- Mar 28, 2018, 2:40 AM CDT (07:40 UTC)
- Expired
- Mar 28, 2018, 8:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bexar County, TX, Medina County, TX
The radar
The Austin/San Antonio radar (KEWX), 70 km from the middle of the area, began a volume at 07:43 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 |
|---|---|---|---|
| Mar 28, 3:18 AM CDT | FLASH FLOOD | 1 W Balcones Heights, TX | 25 CLOSURES REPORTED ON BEXARFLOOD.ORG SPANNING THE NORTH SIDE OF SAN ANTONIO. |
| Mar 28, 3:29 AM CDT | FLASH FLOOD | 1 Wsw Sea World, TX | SAFD DISPATCH REPORTS WATER RESCUE NEAR THE INTERSECTION OF WESTCREEK OAKS AND W MILITARY DRIVE. |
| Mar 28, 3:33 AM CDT | FLASH FLOOD | 1 Se Hollywood Park, TX | SAFD DISPATCH REPORTS WATER RESCUE NEAR INTERSECTION OF CHULA VISTA DRIVE AND SAN PEDRO AVE JUST EAST OF HWY 281. |
| Mar 28, 3:53 AM CDT | FLASH FLOOD | 4 Nnw Live Oak, TX | WATER RESCUE REPORTED AT LOOP 1604 AND GREEN MOUNTAIN ROAD. |
| Mar 28, 3:54 AM CDT | FLASH FLOOD | 3 Nw Live Oak, TX | WATER EVACUATION REPORTED AT AN APARTMENT COMPLEX AT 14900 NACOGDOCHES ROAD. |
| Mar 28, 4:03 AM CDT | FLASH FLOOD | 1 N Windcrest, TX | WATER RESCUE AT INTERSTATE 35 NORTH AND N WEIDNER ROAD. |
| Mar 28, 4:34 AM CDT | FLASH FLOOD | 1 Ne Hollywood Park, TX | WATER RESCUE AT US 281 AND LOOP 1604. |
| Mar 28, 4:35 AM CDT | FLASH FLOOD | 1 Nnw Windcrest, TX | WATER RESCUE AT I-35 AND THOUSAND OAKS. |
| Mar 28, 5:01 AM CDT | FLASH FLOOD | 1 Sw San Antonio, TX | LOWER LEVEL OF I-35 IN DOWNTOWN SAN ANTONIO BETWEEN ALAMO AND GUADALUPE STREETS CLOSED DUE TO HIGH WATER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Del Rio, TX (KDLF), launched 00:00Z, 7.7 hours before the alert went out and 205 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
- 161 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 821 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
857
WGUS54 KEWX 280740
FFWEWX
TXC029-325-281115-
/O.NEW.KEWX.FF.W.0001.180328T0740Z-180328T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
240 AM CDT WED MAR 28 2018
The National Weather Service in Austin San Antonio has issued a
* Flash Flood Warning for...
Medina County in south central Texas...
Northwestern Bexar County in south central Texas...
* Until 615 AM CDT
* At 237 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across northern Bexar county and renewed heavy rains
across much of Medina county. Up to four inches of rain have
already fallen, especially across northern Medina county with up
to 2 inches across northwestern Bexar county. Flash flooding is
expected to begin shortly.
* Some locations that will experience flooding include...
San Antonio, Universal City, Live Oak, Selma, Hondo, Castroville,
San Antonio Int Airport, Leon Valley, Helotes, Fair Oaks Ranch,
Kirby, Alamo Heights, Windcrest, Terrell Hills, Shavano Park,
Hollywood Park, Cross Mountain, Olmos Park, Lacoste and D'Hanis.
Additional rainfall amounts of 1 to 4 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets, and underpasses
as well as other drainage areas and low lying spots.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 2956 9940 2962 9912 2962 9899 2956 9899
2955 9894 2971 9879 2975 9854 2974 9845
2971 9843 2973 9841 2972 9834 2970 9836
2970 9838 2967 9838 2958 9830 2936 9848
2935 9871 2927 9891 2922 9940
$$
CP4 follow-up statements
693
WGUS74 KEWX 280840
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
340 AM CDT WED MAR 28 2018
TXC029-325-281115-
/O.CON.KEWX.FF.W.0001.000000T0000Z-180328T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Medina TX-Bexar TX-
340 AM CDT WED MAR 28 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR
MEDINA AND NORTHWESTERN BEXAR COUNTIES...
At 337 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across northern Bexar county with light to moderate rains
elsewhere. Up to four inches of rain have already fallen. Flash
flooding is expected to begin shortly.
Some locations that will experience flooding include...
San Antonio, Universal City, Live Oak, Selma, Hondo, Castroville, San
Antonio Int Airport, Leon Valley, Helotes, Fair Oaks Ranch, Kirby,
Alamo Heights, Windcrest, Terrell Hills, Shavano Park, Hollywood
Park, Cross Mountain, Olmos Park, Lacoste and D'Hanis.
Additional rainfall amounts of up to 2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 2956 9940 2962 9912 2962 9899 2956 9899
2955 9894 2971 9879 2975 9854 2974 9845
2971 9843 2973 9841 2972 9834 2970 9836
2970 9838 2967 9838 2958 9830 2936 9848
2935 9871 2927 9891 2922 9940
$$
CP929
WGUS74 KEWX 281006
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
506 AM CDT WED MAR 28 2018
TXC029-325-281115-
/O.CON.KEWX.FF.W.0001.000000T0000Z-180328T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Medina TX-Bexar TX-
506 AM CDT WED MAR 28 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR
MEDINA AND NORTHWESTERN BEXAR COUNTIES...
At 504 AM CDT, Doppler radar indicated thunderstorms producing light
to moderate rain across Medina and northwestern Bexar counties. Up
to four inches of rain have already fallen. Flash flooding will
continue from the earlier heavy rains.
Some locations that will experience flooding include...
San Antonio, Universal City, Live Oak, Selma, Hondo, Castroville, San
Antonio Int Airport, Leon Valley, Helotes, Fair Oaks Ranch, Kirby,
Alamo Heights, Windcrest, Terrell Hills, Shavano Park, Hollywood
Park, Cross Mountain, Olmos Park, Lacoste and D'Hanis.
Additional rainfall amounts of up to 1/2 inch are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 2956 9940 2962 9912 2962 9899 2956 9899
2955 9894 2971 9879 2975 9854 2974 9845
2971 9843 2973 9841 2972 9834 2970 9836
2970 9838 2967 9838 2958 9830 2936 9848
2935 9871 2927 9891 2922 9940
$$
CP847
WGUS54 KEWX 281108
FFWEWX
TXC029-325-281315-
/O.EXT.KEWX.FF.W.0001.000000T0000Z-180328T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
608 AM CDT WED MAR 28 2018
The National Weather Service in Austin San Antonio has extended the
* Flash Flood Warning for...
Medina County in south central Texas...
Northwestern Bexar County in south central Texas...
* Until 815 AM CDT
* At 606 AM CDT, Doppler radar indicated isolated thunderstorms
producing moderate rain across the warned area. Up to four inches
of rain have already fallen. Flash flooding is occurring due to
earlier heavy rains and will subside in the next hour or two.
* Some locations that will experience flooding include...
San Antonio, Universal City, Live Oak, Selma, Hondo, Castroville,
San Antonio Int Airport, Leon Valley, Helotes, Fair Oaks Ranch,
Kirby, Alamo Heights, Windcrest, Terrell Hills, Shavano Park,
Hollywood Park, Cross Mountain, Olmos Park, Lacoste and D'Hanis.
Additional rainfall amounts of up to 1/2 inch are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 2956 9940 2962 9912 2962 9899 2956 9899
2955 9894 2971 9879 2975 9854 2974 9845
2971 9843 2973 9841 2972 9834 2970 9836
2970 9838 2967 9838 2958 9830 2936 9848
2935 9871 2927 9891 2922 9940
$$
CP513
WGUS74 KEWX 281113
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
613 AM CDT WED MAR 28 2018
TXC029-325-281315-
/O.CON.KEWX.FF.W.0001.000000T0000Z-180328T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Medina TX-Bexar TX-
613 AM CDT WED MAR 28 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 AM CDT FOR
MEDINA AND NORTHWESTERN BEXAR COUNTIES...
At 609 AM CDT, Some creeks and rivers were in flood from earlier
heavy rains up to 4.5 inches. This flooding will begin to subside in
the next hour or two.
Some locations that will experience flooding include...
San Antonio, Universal City, Live Oak, Selma, Hondo, Castroville, San
Antonio Int Airport, Leon Valley, Helotes, Fair Oaks Ranch, Kirby,
Alamo Heights, Windcrest, Terrell Hills, Shavano Park, Hollywood
Park, Cross Mountain, Olmos Park, Lacoste and D'Hanis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 2956 9940 2962 9912 2962 9899 2956 9899
2955 9894 2971 9879 2975 9854 2974 9845
2971 9843 2973 9841 2972 9834 2970 9836
2970 9838 2967 9838 2958 9830 2936 9848
2935 9871 2927 9891 2922 9940
$$
CPThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 7:56 PM CDT | Flash Flood Watch | EWX | Bastrop, Bexar, Blanco, Burnet, Caldwell, Comal and 10 more | 23 hr |
| Mar 27, 10:13 PM CDT | Special Weather Statement | EWX | Dimmit | 47 min |
| Mar 27, 10:30 PM CDT | Special Weather Statement | EWX | Medina | 45 min |
| Mar 27, 11:15 PM CDT | Special Weather Statement | EWX | Medina | 30 min |
| Mar 27, 11:17 PM CDT | Special Weather Statement | EWX | Medina | 43 min |
| Mar 27, 11:46 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Maverick | 59 min |
| Mar 27, 11:52 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 53 min |
| Mar 27, 11:55 PM CDT | Areal Flood Advisory | EWX | Medina, Uvalde | 3 hr |
| Mar 27, 11:56 PM CDT | Special Weather Statement | EWX | Bandera | 64 min |
| Mar 28, 12:08 AM CDT | Special Weather Statement | EWX | Val Verde | 52 min |
| Mar 28, 12:21 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Bexar, Medina | 39 min |
| Mar 28, 12:34 AM CDT | Severe Thunderstorm Warning | EWX | Dimmit | 41 min |
| Mar 28, 12:44 AM CDT | Special Weather Statement | EWX | Gillespie | 46 min |
| Mar 28, 1:05 AM CDT | Special Weather Statement | EWX | Llano | 40 min |
| Mar 28, 1:26 AM CDT | Special Weather Statement | EWX | Maverick | 49 min |
| Mar 28, 1:36 AM CDT | Areal Flood Advisory | EWX | Bexar, Medina | 3 hr |
| Mar 28, 2:02 AM CDT | Special Weather Statement | EWX | Comal | 28 min |
| Mar 28, 2:25 AM CDT | Areal Flood Advisory | EWX | Blanco, Comal, Hays, Kendall | 3 hr |
| Mar 28, 2:38 AM CDT | Special Weather Statement | EWX | Dimmit | 37 min |
| Mar 28, 3:12 AM CDT | Areal Flood Advisory | EWX | Comal, Hays, Travis | 3 hr |
| Mar 28, 3:56 AM CDT | Flash Flood Warning | EWX | Comal, Hays, Travis, Williamson | 6 hr |
| Mar 28, 4:12 AM CDT | Areal Flood Advisory | EWX | Bexar, Guadalupe, Wilson | 3 hr |
| Mar 28, 4:51 AM CDT | Tornado Warning | EWX | Caldwell | 24 min |
| Mar 28, 7:34 AM CDT | River Flood Warning | EWX | Travis | 15 hr |
| Mar 28, 7:57 AM CDT | Special Weather Statement | EWX | Uvalde | 48 min |
| Mar 28, 8:09 AM CDT | Severe Thunderstorm Warning | EWX | Medina, Uvalde, Zavala | 51 min |
| Mar 28, 8:33 AM CDT | Severe Thunderstorm Warning | EWX | Medina | 42 min |
| Mar 28, 8:48 AM CDT | Flash Flood Warning | EWX | Medina | 3 hr |
| Mar 28, 9:16 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Bexar, Medina | 59 min |
| Mar 28, 9:55 AM CDT | Flash Flood Warning | EWX | Bexar, Comal, Guadalupe | 5 hr |
| Mar 28, 10:16 AM CDT | Special Weather Statement | EWX | Bexar | 44 min |
| Mar 28, 10:39 AM CDT | Flash Flood Warning | EWX | Bastrop, Caldwell, Comal, Guadalupe, Hays, Travis and 1 more | 3 hr |
| Mar 28, 10:57 AM CDT | Special Weather Statement | EWX | Guadalupe | 48 min |
| Mar 28, 10:59 AM CDT | River Flood Warning | EWX | Bexar | 7 hr |
| Mar 28, 11:40 AM CDT | Special Weather Statement | EWX | Caldwell | 50 min |
| Mar 28, 2:17 PM CDT | River Flood Warning | EWX | Bexar, Wilson | 34 hr |
| Mar 28, 2:42 PM CDT | River Flood Warning | EWX | Bexar | 18 hr |
Nearby
Flash Flood Warnings in Texas, 2018Every flash flood warning in 2018
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.