Alert archive / Texas / Flash Flood Warnings in 2026

Flash Flood Warning 20, NWS Fort Worth, TX

May 10, 2026Fannin County, Lamar County, Texas

NWS Fort Worth, TX issued this flash flood warning at May 10, 2026, 2:05 AM CDT for Fannin County, Lamar 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 10, 2026, 2:05 AM CDT (07:05 UTC)
Expired: May 10, 2026, 5:15 AM CDT
In force: 3 hr
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Flood severity: None

Counties Fannin County, TX, Lamar County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 180 km from the middle of the area, began a volume at 07:09 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

Norman, OK (KOUN), launched 00:00Z, 7.1 hours before the alert went out and 227 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: 143 J/kg
Mixed-layer CIN: -211 J/kg
Mixed-layer LCL: 2105 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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 9, 6:32 PM CDT, 7 hours 33 minutes earlier.

Area forecast discussion, May 9, 6:32 PM CDT, 7 hours 33 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 11:06 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Montague	41 min
May 10, 12:41 AM CDT	Special Weather Statement	FWD	Grayson	34 min
May 10, 12:49 AM CDT	Severe Thunderstorm Warning	FWD	Grayson	41 min
May 10, 1:21 AM CDT	Severe Thunderstorm Warning	FWD	Fannin, Grayson	54 min
May 10, 1:45 AM CDT	Special Weather Statement	FWD	Lamar	30 min
May 10, 2:18 AM CDT	Special Weather Statement	FWD	Lamar	27 min
May 10, 2:44 AM CDT	Special Weather Statement	FWD	Grayson	31 min
May 10, 2:48 AM CDT	Severe Thunderstorm Warning	FWD	Grayson	37 min
May 10, 3:09 AM CDT	Severe Thunderstorm Warning	FWD	Cooke, Grayson	36 min
May 10, 9:43 AM CDT	Special Weather Statement	FWD	Cooke, Montague	32 min
May 10, 10:19 AM CDT	Special Weather Statement	FWD	Cooke, Denton, Grayson, Montague, Wise	41 min
May 10, 12:53 PM CDT	Special Weather Statement	FWD	Rains	37 min
May 10, 2:50 PM CDT	Special Weather Statement	FWD	Stephens	40 min
May 10, 2:55 PM CDT	Severe Thunderstorm Warning	FWD	Stephens	40 min
May 10, 3:16 PM CDT	Severe Thunderstorm Warning	FWD	Eastland, Stephens	44 min
May 10, 3:24 PM CDT	Severe Thunderstorm Warning	FWD	Eastland, Erath	66 min
May 10, 4:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FWD	Erath	64 min
May 10, 4:45 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FWD	Comanche, Erath, Hamilton	60 min
May 10, 5:17 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FWD	Comanche	28 min
May 10, 5:38 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FWD	Comanche, Hamilton	67 min
May 10, 5:40 PM CDT	Special Weather Statement	FWD	Young	65 min
May 10, 6:03 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Palo Pinto, Stephens, Young	57 min
May 10, 6:31 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FWD	Coryell, Hamilton	59 min
May 10, 6:36 PM CDT	Severe Thunderstorm Warning	FWD	Lampasas, Mills	26 min

Nearby

Flash Flood Warnings in Texas, 2026 Every 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.