Alert archive / Texas / Flash Flood Warnings in 2026

Flash Flood Warning 23, NWS Fort Worth, TX

May 19, 2026Cooke County, Grayson County, Texas

NWS Fort Worth, TX issued this flash flood warning at May 19, 2026, 10:53 AM CDT for Cooke County, Grayson 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 counties it named.

The facts

Issued
May 19, 2026, 10:53 AM CDT (15:53 UTC)
Expired
May 19, 2026, 2:00 PM CDT
In force
3 hr
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Flood severity
None

Counties Cooke County, TX, Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 123 km from the middle of the area, began a volume at 15:55 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, 3.9 hours before the alert went out and 95 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-pSkew-T log-p diagram, Fort Worth, TX at 12:00Z on 2026-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3435 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 12:00Z on 2026-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
3435 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
621 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this flash flood warning went out at May 19, 7:11 AM CDT, 3 hours 42 minutes earlier.

Area forecast discussion, May 19, 7:11 AM CDT, 3 hours 42 minutes before
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In the hours before

Special weather statement, May 19, 9:20 AM CDT, 1 hour 33 minutes before
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Special weather statement, May 19, 9:41 AM CDT, 1 hour 12 minutes before
Special Weather Statement
National Weather Service Fort Worth TX
941 AM CDT Tue May 19 2026

TXZ092-093-191515-
Grayson TX-Cooke TX-
941 AM CDT Tue May 19 2026

...A strong thunderstorm will impact portions of northeastern Cooke
and northern Grayson Counties through 1015 AM CDT...

At 939 AM CDT, Doppler radar was tracking a strong thunderstorm near
Pottsboro, or 15 miles northwest of Sherman, moving northeast at 20
mph.

HAZARD...Pea size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

This strong thunderstorm will be near...
  Pottsboro, southeastern Lake Texoma, Lake Texoma, and Eisenhower
  State Park around 945 AM CDT.
  Denison around 950 AM CDT.

Other locations impacted by this storm include Dixie, Preston,
Gordonville, Sandusky, Dexter, Sadler, Sherwood Shores, and Locust.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

If on or near Lake Texoma, get out of the water and move indoors or
inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.

&&

LAT...LON 3396 9691 3387 9688 3385 9685 3387 9683
      3387 9680 3382 9676 3384 9669 3392 9667
      3390 9659 3384 9662 3382 9653 3377 9650
      3378 9644 3376 9641 3366 9688 3386 9701
      3389 9698 3395 9700 3396 9698 3394 9697
TIME...MOT...LOC 1439Z 242DEG 16KT 3382 9672

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH

Darrah
Special weather statement, May 19, 9:41 AM CDT, 1 hour 12 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 19, 9:20 AM CDTSpecial Weather StatementFWDRains25 min
May 19, 9:41 AM CDTSpecial Weather StatementFWDGrayson34 min
May 19, 9:41 AM CDTSpecial Weather StatementFWDGrayson34 min
May 19, 11:48 AM CDTSpecial Weather StatementFWDCooke27 min
May 19, 12:01 PM CDTSevere Thunderstorm WarningFWDCooke, Denton, Wise44 min
May 19, 1:05 PM CDTSpecial Weather StatementFWDLamar25 min
May 19, 1:09 PM CDTSpecial Weather StatementFWDErath36 min
May 19, 1:13 PM CDTSpecial Weather StatementFWDDenton32 min
May 19, 1:41 PM CDTSpecial Weather StatementFWDCollin49 min
May 19, 1:57 PM CDTSpecial Weather StatementFWDCollin48 min
May 19, 2:28 PM CDTSpecial Weather StatementFWDTarrant32 min
May 19, 2:52 PM CDTFlash Flood WarningFWDCollin, Denton3 hr
May 19, 2:58 PM CDTSpecial Weather StatementFWDTarrant32 min
May 19, 3:06 PM CDTFlash Flood WarningFWDDallas, Tarrant3 hr
May 19, 3:22 PM CDTSpecial Weather StatementFWDJohnson23 min
May 19, 3:40 PM CDTSpecial Weather StatementFWDDallas35 min
May 19, 4:00 PM CDTSevere Thunderstorm WarningFWDCollin, Dallas24 min
May 19, 4:04 PM CDTSpecial Weather StatementFWDJohnson41 min
May 19, 4:13 PM CDTFlash Flood WarningFWDDallas, Tarrant3 hr
May 19, 4:21 PM CDTSpecial Weather StatementFWDDallas, Hunt, Rockwall54 min
May 19, 4:49 PM CDTSpecial Weather StatementFWDBosque41 min
May 19, 5:02 PM CDTSpecial Weather StatementFWDBosque28 min
May 19, 5:08 PM CDTSevere Thunderstorm WarningFWDBosque, Hamilton48 min
May 19, 5:24 PM CDTSpecial Weather StatementFWDHamilton36 min
May 19, 6:04 PM CDTSpecial Weather StatementFWDCoryell56 min
May 19, 6:23 PM CDTSevere Thunderstorm WarningFWDBosque, Coryell, McLennan52 min
May 19, 6:53 PM CDTSpecial Weather StatementFWDBell, Lampasas67 min

Nearby

Flash Flood Warnings in Texas, 2026Every flash flood warning in 2026

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.