Alert archive / Texas / Flash Flood Warnings in 2003

Flash Flood Warning 21, NWS Amarillo, TX

September 10, 2003Donley County, Gray County, Texas

NWS Amarillo, TX issued this flash flood warning at Sep 10, 2003, 11:52 PM CDT for Donley County, Gray County, Texas. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 10, 2003, 11:52 PM CDT (04:52 UTC)
Expired: Sep 11, 2003, 4:00 AM CDT
In force: 4 hr
Issued by: NWS Amarillo, TX
Area: Counties, with a storm outline in the text

Counties Donley County, TX, Gray County, TX

The radar

The Amarillo radar (KAMA), 80 km from the middle of the area, began a volume at 04:53 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 00:00Z, 4.9 hours before the alert went out and 79 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: 959 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 2150 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KAMA 110457
FFWAMA
TXC129-179-110900-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
1152 PM CDT WED SEP 10 2003

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DONLEY COUNTY IN THE PANHANDLE OF TEXAS
  THIS INCLUDES THE CITY OF HOWARDWICK
  GRAY COUNTY IN THE PANHANDLE OF TEXAS
  THIS INCLUDES THE CITY OF MCLEAN

* UNTIL 400 AM CDT

* AT 1150 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN OVER MCLEAN...OR ABOUT 20 MILES WEST OF SHAMROCK. THE STORMS  
  PRODUCING THE VERY HEAVY RAINS WERE MOVING EAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE ALANREED...GREENBELT LAKE...
  HEDLEY...HOWARDWICK...LAKE MCCLELLAN...LEFORS AND LELIA LAKE

THIS IS A VERY DANGEROUS SITUATION IF FLASH FLOODING IS OBSERVED 
ACT QUICKLY MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS.

NEVER ATTEMPT TO CROSS FLOWING WATER IN AN AUTOMOBILE OR ON FOOT 
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.

LAT...LON 3480 10102 3482 10057 3561 10057 3561 10104

$$

05

1 follow-up statement

000 
WGUS74 KAMA 110616
FFSAMA
TXC129-179-110900-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
112 AM CDT THU SEP 11 2003

...A FLASH FLOOD WARNING CONTINUES FOR GRAY AND DONLEY COUNTIES UNTIL
400 AM CDT...

AT 1255 AM CDT...NATIONAL WEATHER SERVICE SPOTTERS REPORTED WATER OF 
HIGHWAY 287 IN CLARENDON. ALTHOUGH THE HEAVY RAINFALL HAS COME TO AN 
END...FLOODING OF LOW LYING AND POOR DRAINAGE AREAS WILL CONTINUE AS 
ADDITIONAL LIGHT TO MODERATE SHOWERS AND THUNDERSTORMS MOVE THROUGH 
THE AREA.

THIS IS A VERY DANGEROUS SITUATION. EXCESSIVE RUNOFF FROM THIS STORM 
WILL CAUSE FLASH FLOODING ACROSS HIGHWAYS...SMALL CREEKS AND 
NORMALLY DRY WASHES...AS WELL AS LOW LYING RANCH LAND.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE FLOOD
DANGERS.

NEVER ATTEMPT TO CROSS FLOWING WATER IN AN AUTOMOBILE OR ON FOOT
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.

LAT...LON 3480 10102 3482 10057 3561 10057 3561 10104

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 10, 7:19 PM CDT	Tornado Warning	AMA	Collingsworth	41 min
Sep 10, 7:58 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	62 min
Sep 10, 8:18 PM CDT	Flash Flood Warning	AMA	Collingsworth, Wheeler	3 hr
Sep 10, 8:59 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	61 min
Sep 10, 9:03 PM CDT	Flash Flood Warning	AMA	Donley, Gray	3 hr
Sep 10, 9:41 PM CDT	Severe Thunderstorm Warning	AMA	Donley, Gray	64 min
Sep 10, 9:58 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	62 min
Sep 10, 11:10 PM CDT	Flash Flood Warning	AMA	Collingsworth, Wheeler	4 hr
Sep 10, 11:18 PM CDT	Severe Thunderstorm Warning	AMA	Donley	57 min

Nearby

Flash Flood Warnings in Texas, 2003 Every flash flood warning in 2003

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.