Alert archive / Texas / Flash Flood Warnings in 2023

Flash Flood Warning 37, NWS San Angelo, TX

October 24, 2023Nolan County, Texas

NWS San Angelo, TX issued this flash flood warning at Oct 24, 2023, 4:29 AM CDT for Nolan County, Texas. It was in force for 2 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: Oct 24, 2023, 4:29 AM CDT (09:29 UTC)
Expired: Oct 24, 2023, 6:30 AM CDT
In force: 2 hr
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Flood severity: None

County Nolan County, TX

The radar

The San Angelo radar (KSJT), 104 km from the middle of the area, began a volume at 09:31 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

Midland Regional, TX (KMAF), launched 00:00Z, 9.5 hours before the alert went out and 173 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: 3 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 649 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 112 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 San Angelo, TX wrote its last area forecast discussion before this flash flood warning went out at Oct 24, 4:27 AM CDT, 2 minutes earlier.

Area forecast discussion, Oct 24, 4:27 AM CDT, 2 minutes before

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Hazardous weather outlook, Oct 24, 4:21 AM CDT, 8 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 23, 11:09 PM CDT	Areal Flood Advisory	SJT	Crockett, Irion	3 hr
Oct 24, 12:44 AM CDT	Areal Flood Advisory	SJT	Coke, Irion, Sterling, Tom Green	3 hr
Oct 24, 3:27 AM CDT	Areal Flood Advisory	SJT	Fisher, Jones, Nolan, Taylor	3 hr
Oct 24, 10:50 AM CDT	Areal Flood Advisory	SJT	Brown, San Saba	3 hr

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.