Alert archive / Texas / Flash Flood Warnings in 2023

Flash Flood Warning 21, NWS Fort Worth, TX

October 4, 2023Grayson County, Texas

NWS Fort Worth, TX issued this flash flood warning at Oct 4, 2023, 7:47 PM CDT for Grayson County, Texas. It was in force for 4 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: Oct 4, 2023, 7:47 PM CDT (00:47 UTC)
Expired: Oct 5, 2023, 12:00 AM CDT
In force: 4 hr
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Flood severity: None

County Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 151 km from the middle of the area, began a volume at 00:49 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 00:00Z, 0.8 hours before the alert went out and 124 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: 1617 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1748 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 5.5

Open this sounding in Storm Lab

The text

As transmitted.

287 
WGUS54 KFWD 050047
FFWFWD
TXC181-050300-
/O.NEW.KFWD.FF.W.0021.231005T0047Z-231005T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Fort Worth TX
747 PM CDT Wed Oct 4 2023

The National Weather Service in Fort Worth has issued a

* Flash Flood Warning for...
  Northern Grayson County in north central Texas...

* Until 1000 PM CDT.

* At 747 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts up to 1 inch are 
  possible. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets, and underpasses as well as other
           poor drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Sherman, Denison, Pottsboro, Knollwood, Lake Texoma, Eisenhower 
  State Park, Randell Lake, Preston, Sadler, Locust, Sherwood 
  Shores, Gordonville, Sandusky, Dixie and Carpenters Bluff.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3389 9659 3385 9663 3382 9657 3382 9653
      3377 9650 3378 9642 3373 9638 3364 9677
      3371 9694 3395 9694 3396 9692 3394 9690
      3385 9687 3385 9684 3387 9683 3386 9678
      3382 9676 3384 9670 3391 9667

FLASH FLOOD...RADAR INDICATED

$$

30

4 follow-up statements

110 
WGUS74 KFWD 050211
FFSFWD

Flash Flood Statement
National Weather Service Fort Worth TX
911 PM CDT Wed Oct 4 2023

TXC181-050300-
/O.CON.KFWD.FF.W.0021.000000T0000Z-231005T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Grayson TX-
911 PM CDT Wed Oct 4 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS 
EVENING FOR NORTHERN GRAYSON COUNTY...

At 911 PM CDT, Doppler radar and automated rain gauges indicated 
thunderstorms produced heavy rain across the warned area and light 
to moderate rainfall continues. Between 2 and 3 inches of rain have 
fallen. Additional rainfall amounts of 0.5 to 1 inch are possible. 
Flash flooding is ongoing or expected.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar and automated gauges.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets, and underpasses as well as other poor
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Sherman, Denison, Pottsboro, Knollwood, Lake Texoma, Eisenhower 
  State Park, Randell Lake, Preston, Sadler, Locust, Sherwood 
  Shores, Gordonville, Sandusky, Dixie and Carpenters Bluff.

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 3389 9659 3385 9663 3382 9657 3382 9653
      3377 9650 3378 9642 3373 9638 3364 9677
      3371 9694 3395 9694 3396 9692 3394 9690
      3385 9687 3385 9684 3387 9683 3386 9678
      3382 9676 3384 9670 3391 9667

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

Schroeder

612 
WGUS54 KFWD 050244
FFWFWD
TXC181-050400-
/O.EXT.KFWD.FF.W.0021.000000T0000Z-231005T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Fort Worth TX
944 PM CDT Wed Oct 4 2023

The National Weather Service in Fort Worth has extended the

* Flash Flood Warning for...
  Northern Grayson County in north central Texas...

* Until 1100 PM CDT.

* At 944 PM CDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  2 and 3 inches of rain have fallen. Additional rainfall amounts of 
  0.5 to 1 inch are possible. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar and automated gauges.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets, and underpasses as well as other
           poor drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Sherman, Denison, Pottsboro, Knollwood, Lake Texoma, Eisenhower 
  State Park, Randell Lake, Preston, Sadler, Locust, Sherwood 
  Shores, Gordonville, Sandusky, Dixie and Carpenters Bluff.

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 3389 9659 3385 9663 3382 9657 3382 9653
      3377 9650 3378 9642 3373 9638 3364 9677
      3371 9694 3395 9694 3396 9692 3394 9690
      3385 9687 3385 9684 3387 9683 3386 9678
      3382 9676 3384 9670 3391 9667

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

Schroeder

062 
WGUS54 KFWD 050351
FFWFWD
TXC181-050500-
/O.EXT.KFWD.FF.W.0021.000000T0000Z-231005T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Fort Worth TX
1051 PM CDT Wed Oct 4 2023

The National Weather Service in Fort Worth has extended the

* Flash Flood Warning for...
  Northern Grayson County in north central Texas...

* Until midnight CDT tonight.

* At 1051 PM CDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  2 and 3 inches of rain have fallen. Additional rainfall amounts of 
  up to 0.5 inch are possible. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar and automated gauges.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets, and underpasses as well as other
           poor drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Sherman, Denison, Pottsboro, Knollwood, Lake Texoma, Eisenhower 
  State Park, Randell Lake, Preston, Sadler, Locust, Sherwood 
  Shores, Gordonville, Sandusky, Dixie and Carpenters Bluff.

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 3389 9659 3385 9663 3382 9657 3382 9653
      3377 9650 3378 9642 3373 9638 3364 9677
      3371 9694 3395 9694 3396 9692 3394 9690
      3385 9687 3385 9684 3387 9683 3386 9678
      3382 9676 3384 9670 3391 9667

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

Schroeder

965 
WGUS74 KFWD 050500
FFSFWD

Flash Flood Statement
National Weather Service Fort Worth TX
1200 AM CDT Thu Oct 5 2023

TXC181-050510-
/O.EXP.KFWD.FF.W.0021.000000T0000Z-231005T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Grayson TX-
1200 AM CDT Thu Oct 5 2023

...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHERN GRAYSON COUNTY...

The heavy rain has ended. Nuisance flooding of low lying and/or poor 
drainage areas may continue for a few hours until the water has had 
a chance to recede. New flooding is no longer expected. Please 
continue to heed remaining road closures.

LAT...LON 3389 9659 3385 9663 3382 9657 3382 9653
      3377 9650 3378 9642 3373 9638 3364 9677
      3371 9694 3395 9694 3396 9692 3394 9690
      3385 9687 3385 9684 3387 9683 3386 9678
      3382 9676 3384 9670 3391 9667

$$

Schroeder

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 4, 7:14 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Cooke, Denton, Grayson	46 min
Oct 4, 7:16 PM CDT	Severe Thunderstorm Warning	FWD	Fannin	59 min
Oct 4, 7:37 PM CDT	Special Weather Statement	FWD	Jack	53 min
Oct 4, 7:50 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Palo Pinto, Parker, Wise	55 min
Oct 4, 7:55 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Denton	65 min
Oct 4, 8:02 PM CDT	Severe Thunderstorm Warning	FWD	Lamar	30 min
Oct 4, 8:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FWD	Parker, Tarrant	49 min
Oct 4, 9:04 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Hopkins, Hunt, Rains	56 min
Oct 4, 9:06 PM CDT	Flash Flood Warning	FWD	Dallas, Rockwall	3 hr
Oct 4, 9:12 PM CDT	Severe Thunderstorm Warning	FWD	Dallas, Ellis, Johnson, Tarrant	63 min
Oct 4, 9:19 PM CDT	Flash Flood Warning	FWD	Tarrant	4 hr
Oct 4, 9:42 PM CDT	Tornado Warning	FWD	Dallas, Ellis	48 min
Oct 4, 9:44 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Hopkins, Rains	61 min
Oct 4, 9:57 PM CDT	Flash Flood Warning	FWD	Collin, Hunt	3 hr
Oct 4, 9:58 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Hill, Johnson, Navarro	62 min
Oct 4, 10:29 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Henderson, Kaufman, Navarro	61 min
Oct 4, 10:36 PM CDT	Areal Flood Advisory	FWD	Dallas, Ellis, Johnson	3 hr
Oct 4, 10:56 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Hill, Limestone, Navarro	64 min
Oct 4, 11:07 PM CDT	Areal Flood Advisory	FWD	Kaufman	3 hr
Oct 4, 11:13 PM CDT	River Flood Warning	FWD	Dallas	2 hr
Oct 4, 11:24 PM CDT	Special Weather Statement	FWD	McLennan	36 min
Oct 4, 11:30 PM CDT	Severe Thunderstorm Warning	FWD	Anderson, Henderson, Kaufman, Navarro, Van Zandt	60 min
Oct 4, 11:41 PM CDT	Special Weather Statement	FWD	Van Zandt	34 min
Oct 4, 11:52 PM CDT	Severe Thunderstorm Warning	FWD	Anderson, Freestone, Henderson, Navarro	38 min
Oct 4, 11:55 PM CDT	Special Weather Statement	FWD	Falls, Freestone, Limestone, McLennan	50 min
Oct 5, 12:30 AM CDT	Special Weather Statement	FWD	Anderson	45 min
Oct 5, 1:13 AM CDT	Special Weather Statement	FWD	Anderson	47 min
Oct 5, 1:35 AM CDT	Severe Thunderstorm Warning	FWD	Anderson	25 min
Oct 5, 1:44 AM CDT	Areal Flood Advisory	FWD	Anderson	106 min
Oct 5, 2:16 AM CDT	Special Weather Statement	FWD	Leon	44 min

Nearby

Flash Flood Warnings in Texas, 2023 Every flash flood warning in 2023

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.