Alert archive / Texas / Flash Flood Watches in 2021
Flash Flood Watch 4, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood watch at Jul 7, 2021, 4:26 AM CDT for 8 counties in Texas. It was in force for 63 hr.
The area
The counties it named.
The facts
- Issued
- Jul 7, 2021, 4:26 AM CDT (09:26 UTC)
- Expired
- Jul 9, 2021, 7:00 PM CDT
- In force
- 63 hr
- Issued by
- NWS Austin/San Antonio, TX
- Flood severity
- None
Counties Atascosa County, TX, Bexar County, TX, DeWitt County, TX, Gonzales County, TX, Guadalupe County, TX, Karnes County, TX, Lavaca County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 55 km from the middle of the area, began a volume at 09:30 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 00:00Z, 9.4 hours before the alert went out and 175 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
- 194 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 631 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- -37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
551 WGUS64 KEWX 070926 FFAEWX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Austin/San Antonio TX 426 AM CDT Wed Jul 7 2021 .A slow moving low pressure system across South Texas will continue to draw in abundant moisture to the region fueling the development of rounds of showers and storms today through Thursday night, capable of producing locally heavy rain and flooding. TXZ222-224-225-071730- /O.NEW.KEWX.FF.A.0004.210707T0926Z-210709T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Karnes-De Witt-Lavaca- Including the cities of Cuero, Karnes City, and Hallettsville 426 AM CDT Wed Jul 7 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING... The National Weather Service in Austin/San Antonio has issued a * Flash Flood Watch for a portion of south central Texas, including the following areas, De Witt, Karnes and Lavaca. * Through Friday morning. * Rainfall amounts of 1 to 3 inches with isolated amounts of up to 4 to 6 inches possible. * The heavy rainfall could lead to flash flooding of creeks, streams, and low water crossings. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ RUNYEN
6 follow-up statements
766 WGUS64 KEWX 071842 FFAEWX Flood Watch National Weather Service Austin/San Antonio TX 142 PM CDT Wed Jul 7 2021 .A slow moving low pressure system across South Texas will continue to draw in abundant moisture to the region fueling the development of rounds of showers and storms today through Thursday night, capable of producing locally heavy rain and flooding. TXZ222-224-225-081000- /O.CON.KEWX.FF.A.0004.000000T0000Z-210709T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Karnes-De Witt-Lavaca- Including the cities of Cuero, Karnes City, and Hallettsville 142 PM CDT Wed Jul 7 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING... The Flash Flood Watch continues for * A portion of south central Texas, including the following areas, De Witt, Karnes and Lavaca. * Through Friday morning. * Rainfall amounts of 1 to 3 inches with isolated amounts of up to 4 to 6 inches possible. * The heavy rainfall could lead to flash flooding of creeks, streams, and low water crossings. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ KCW
800 WGUS64 KEWX 080924 FFAEWX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Austin/San Antonio TX 424 AM CDT Thu Jul 8 2021 .A slow moving low pressure system across South Texas will continue to draw in abundant moisture to the region fueling the development of rounds of showers and storms today through Friday, capable of producing locally heavy rain and flooding. TXZ222-224-225-081730- /O.EXT.KEWX.FF.A.0004.000000T0000Z-210710T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Karnes-De Witt-Lavaca- Including the cities of Cuero, Karnes City, and Hallettsville 424 AM CDT Thu Jul 8 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH FRIDAY EVENING... The Flash Flood Watch is now in effect for * A portion of south central Texas, including the following areas, De Witt, Karnes and Lavaca. * Through Friday evening. * Rainfall amounts of 1 to 4 inches with isolated amounts of 5 to 7 inches possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ RUNYEN
732 WGUS64 KEWX 081858 FFAEWX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Austin/San Antonio TX 158 PM CDT Thu Jul 8 2021 TXZ205-207-220-221-223-090400- /O.EXA.KEWX.FF.A.0004.000000T0000Z-210710T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bexar-Guadalupe-Atascosa-Wilson-Gonzales- Including the cities of Floresville, Pleasanton, Gonzales, San Antonio, and Seguin 158 PM CDT Thu Jul 8 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY EVENING... The National Weather Service in Austin/San Antonio has expanded the * Flash Flood Watch to include a portion of south central Texas, including the following areas, Atascosa, Bexar, Gonzales, Guadalupe and Wilson. * Through Friday evening. * Rainfall amounts of 1 to 4 inches with isolated amounts of 5 to 7 inches possible. This could lead to Flash Flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ TXZ222-224-225-090400- /O.CON.KEWX.FF.A.0004.000000T0000Z-210710T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Karnes-De Witt-Lavaca- Including the cities of Cuero, Karnes City, and Hallettsville 158 PM CDT Thu Jul 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY EVENING... The Flash Flood Watch continues for * A portion of south central Texas, including the following areas, De Witt, Karnes and Lavaca. * Through Friday evening. * Rainfall amounts of 1 to 4 inches with isolated amounts of 5 to 7 inches possible. This could lead to Flash Flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ AAT
542 WGUS64 KEWX 090219 FFAEWX Flood Watch National Weather Service Austin/San Antonio TX 919 PM CDT Thu Jul 8 2021 TXZ205-207-220>225-091030- /O.CON.KEWX.FF.A.0004.000000T0000Z-210710T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bexar-Guadalupe-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca- Including the cities of Karnes City, Floresville, Gonzales, Hallettsville, Seguin, Pleasanton, Cuero, and San Antonio 919 PM CDT Thu Jul 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY EVENING... The Flash Flood Watch continues for * A portion of south central Texas, including the following areas, Atascosa, Bexar, De Witt, Gonzales, Guadalupe, Karnes, Lavaca and Wilson. * Through Friday evening. * Rainfall amounts of 1 to 4 inches with isolated amounts of 5 to 7 inches possible. * The heavy rainfall could lead to flash flooding of creeks, streams, and low water crossings. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CP
257 WGUS64 KEWX 091201 FFAEWX Flood Watch National Weather Service Austin/San Antonio TX 701 AM CDT Fri Jul 9 2021 TXZ205-207-220>225-100000- /O.CON.KEWX.FF.A.0004.000000T0000Z-210710T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bexar-Guadalupe-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca- Including the cities of Karnes City, Floresville, Gonzales, Hallettsville, Seguin, Pleasanton, Cuero, and San Antonio 701 AM CDT Fri Jul 9 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... The Flash Flood Watch continues for * A portion of south central Texas, including the following areas, Atascosa, Bexar, De Witt, Gonzales, Guadalupe, Karnes, Lavaca and Wilson. * Until 7 PM CDT this evening. * Additional rainfall amounts of 1 to 3 inches with isolated amounts of 5 inches possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ HAMPSHIRE
777 WGUS64 KEWX 100023 FFAEWX Flood Watch National Weather Service Austin/San Antonio TX 723 PM CDT Fri Jul 9 2021 TXZ205-207-220>225-100130- /O.EXP.KEWX.FF.A.0004.000000T0000Z-210710T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Bexar-Guadalupe-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca- Including the cities of Karnes City, Floresville, Gonzales, Hallettsville, Seguin, Pleasanton, Cuero, and San Antonio 723 PM CDT Fri Jul 9 2021 ...FLASH FLOOD WATCH HAS EXPIRED... The Flash Flood Watch for a portion of south central Texas, including the following areas, Atascosa, Bexar, De Witt, Gonzales, Guadalupe, Karnes, Lavaca and Wilson has expired. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. $$ PLATT
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 8:56 AM CDT | River Flood Warning | EWX | Goliad, Karnes | 4 days |
Nearby
Flash Flood Watches in Texas, 2021Every flash flood watch 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.