Alert archive / Texas / Flash Flood Warnings in 2023

Flash Flood Warning 47, NWS Amarillo, TX

October 2, 2023Dallam County, Hartley County, Sherman County, Texas

NWS Amarillo, TX issued this flash flood warning at Oct 2, 2023, 4:29 PM CDT for Dallam County, Hartley County, Sherman County, Texas. It was in force for 9 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 2, 2023, 4:29 PM CDT (21:29 UTC)
Expired: Oct 3, 2023, 1:30 AM CDT
In force: 9 hr
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Flood severity: None

Counties Dallam County, TX, Hartley County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 116 km from the middle of the area, began a volume at 21:30 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.5 hours before the alert went out and 117 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: 118 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1051 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 Amarillo, TX wrote its last area forecast discussion before this flash flood warning went out at Oct 2, 2:04 PM CDT, 2 hours 25 minutes earlier.

Area forecast discussion, Oct 2, 2:04 PM CDT, 2 hours 25 minutes before

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Hazardous weather outlook, Oct 2, 1:42 PM CDT, 2 hours 47 minutes before

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In the hours before

Special weather statement, Oct 2, 3:35 PM CDT, 54 minutes before

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Special weather statement, Oct 2, 3:51 PM CDT, 38 minutes before

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Special weather statement, Oct 2, 3:56 PM CDT, 33 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 2, 3:29 PM CDT	Areal Flood Advisory	AMA	Dallam, Hartley, Moore, Sherman	64 min
Oct 2, 3:35 PM CDT	Special Weather Statement	AMA	Sherman	55 min
Oct 2, 3:51 PM CDT	Special Weather Statement	AMA	Hartley	39 min
Oct 2, 3:56 PM CDT	Special Weather Statement	AMA	Oldham	49 min
Oct 2, 5:22 PM CDT	Special Weather Statement	AMA	Sherman	38 min
Oct 2, 6:01 PM CDT	Areal Flood Advisory	AMA	Sherman	5 hr
Oct 2, 6:45 PM CDT	Special Weather Statement	AMA	Cimarron	60 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.