Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 46, NWS San Angelo, TX

September 29, 2021McCulloch County, San Saba County, Texas

NWS San Angelo, TX issued this flash flood warning at Sep 29, 2021, 5:57 PM CDT for McCulloch County, San Saba County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 29, 2021, 5:57 PM CDT (22:57 UTC)
Expired: Sep 29, 2021, 9:00 PM CDT
In force: 3 hr
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties McCulloch County, TX, San Saba County, TX

The radar

The San Angelo radar (KSJT), 124 km from the middle of the area, began a volume at 22:59 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

Fort Worth, TX (KFWD), launched 12:00Z, 11.0 hours before the alert went out and 243 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 5 J/kg
Mixed-layer CIN: -407 J/kg
Mixed-layer LCL: 1372 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

502 
WGUS54 KSJT 292257
FFWSJT
TXC307-411-300200-
/O.NEW.KSJT.FF.W.0046.210929T2257Z-210930T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Angelo TX
557 PM CDT Wed Sep 29 2021

The National Weather Service in San Angelo has issued a

* Flash Flood Warning for...
  Northeastern McCulloch County in west central Texas...
  West Central San Saba County in west central Texas...

* Until 900 PM CDT.

* At 554 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen along and just east of US 377 over northeast McCulloch 
  County. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Richland Springs, Placid, Rochelle, Mercury, Skeeterville, Hall, 
  Milburn and Us-190 Near The Mcculloch-San Saba County Line.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3128 9930 3147 9919 3146 9918 3146 9917
      3147 9917 3131 9884 3113 9918 3122 9931

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

21

1 follow-up statement

288 
WGUS74 KSJT 300037
FFSSJT

Flash Flood Statement
National Weather Service San Angelo TX
737 PM CDT Wed Sep 29 2021

TXC307-411-300200-
/O.CON.KSJT.FF.W.0046.000000T0000Z-210930T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McCulloch TX-San Saba TX-
737 PM CDT Wed Sep 29 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING 
FOR NORTHEASTERN MCCULLOCH AND WEST CENTRAL SAN SABA COUNTIES...

At 734 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1 and 2 inches of rain have 
fallen between US 377 and US 190 in northeast McCulloch County. 
Flash flooding is ongoing or expected to begin shortly. In west 
central San Saba County, rainfall was light but some runoff from 
small streams and flooding of low water crossings are possible.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Radar.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Richland Springs, Placid, Rochelle, Mercury, Skeeterville, Hall, 
  Milburn and Us-190 Near The Mcculloch-San Saba County Line.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3128 9930 3147 9919 3146 9918 3146 9917
      3147 9917 3131 9884 3113 9918 3122 9931

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

21

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 28, 8:26 PM CDT	Flash Flood Warning Considerable damage threat	SJT	Mason	3 hr
Sep 28, 9:29 PM CDT	Areal Flood Advisory	SJT	Kimble, Mason	3 hr
Sep 28, 9:54 PM CDT	Flash Flood Warning Considerable damage threat	SJT	Kimble, Mason	96 min
Sep 28, 10:29 PM CDT	Special Weather Statement	SJT	Mason	46 min
Sep 28, 11:06 PM CDT	Flash Flood Warning Considerable damage threat	SJT	Kimble, Mason	3 hr
Sep 29, 3:00 PM CDT	Special Weather Statement	SJT	Brown	45 min
Sep 29, 3:28 PM CDT	Special Weather Statement	SJT	Coleman	47 min
Sep 29, 3:34 PM CDT	Special Weather Statement	SJT	Taylor	41 min
Sep 29, 3:47 PM CDT	Special Weather Statement	SJT	McCulloch	43 min
Sep 29, 4:02 PM CDT	Special Weather Statement	SJT	Taylor	43 min
Sep 29, 4:27 PM CDT	Special Weather Statement	SJT	McCulloch	48 min
Sep 29, 4:52 PM CDT	Areal Flood Advisory	SJT	Brown, Coleman, Concho, McCulloch, San Saba	113 min
Sep 29, 5:12 PM CDT	Special Weather Statement	SJT	San Saba	48 min
Sep 29, 5:27 PM CDT	Special Weather Statement	SJT	Callahan	33 min
Sep 29, 5:28 PM CDT	Special Weather Statement	SJT	Concho	47 min
Sep 29, 6:17 PM CDT	Areal Flood Advisory	SJT	Concho, McCulloch, Menard	118 min
Sep 29, 6:30 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch	45 min

Nearby

Flash Flood Warnings in Texas, 2021 Every flash flood warning 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.