Alert archive / Texas / Flash Flood Warnings in 2000

Flash Flood Warning 3, NWS Amarillo, TX

April 30, 2000Collingsworth County, Texas

NWS Amarillo, TX issued this flash flood warning at Apr 30, 2000, 9:34 AM CDT for Collingsworth 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 outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Apr 30, 2000, 9:34 AM CDT (14:34 UTC)
Expired: Apr 30, 2000, 12:30 PM CDT
In force: 3 hr
Issued by: NWS Amarillo, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Collingsworth County, TX

The radar

The Amarillo radar (KAMA), 131 km from the middle of the area, began a volume at 14:37 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, 2.6 hours before the alert went out and 130 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: 1736 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KAMA 301434
FFWAMA
TXC087-301730-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
934 AM CDT SUN APR 30 2000

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COLLINGSWORTH COUNTY IN THE TEXAS PANHANDLE

* UNTIL 1230 PM CDT

* AT 930 AM CDT...WEATHER SERVICE RADAR INDICATED THUNDERSTORMS   
PRODUCING VERY HEAVY RAINFALL OVER COLLINGSWORTH COUNTY. THESE 
HEAVY RAIN PRODUCING THUNDERSTORMS WERE NEARLY STATIONARY.

* SOME LOCATIONS AFFECTED INCLUDE...
  WELLINGTON...SAMNORWOOD...QUAIL AND LUTIE

DO NOT DRIVE ACROSS FLOODED ROADWAYS. MOST FLASH FLOOD DEATHS OCCUR
IN AUTOMIBILES.

EXCESSIVE RUNOFF WILL INUNDATE ROADS AND FARM AND RANCH LAND. DO NOT
DRIVE ACROSS FLOODED ROADWAYS! NEVER ATTEMPT TO CROSS FLOWING WATER
IN A CAR OR ON FOOT.

LAT...LON 3475 10052 3477 10001 3517 9999 3518 10055

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 2:51 AM CDT	Severe Thunderstorm Warning	AMA	Gray	54 min
Apr 30, 3:16 AM CDT	Severe Thunderstorm Warning	AMA	Roberts	59 min
Apr 30, 3:39 AM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	66 min
Apr 30, 3:41 AM CDT	Severe Thunderstorm Warning	AMA	Gray	34 min
Apr 30, 4:15 AM CDT	Severe Thunderstorm Warning	AMA	Gray, Roberts	60 min
Apr 30, 4:46 AM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Wheeler	59 min

Nearby

Flash Flood Warnings in Texas, 2000 Every flash flood warning in 2000

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.