Alert archive / Texas / Flash Flood Warnings in 2008

Flash Flood Warning 21, NWS Midland/Odessa, TX

June 30, 2008Terrell County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at Jun 30, 2008, 9:19 PM CDT for Terrell 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 as issued.

The facts

Issued: Jun 30, 2008, 9:19 PM CDT (02:19 UTC)
Expired: Jul 1, 2008, 12:15 AM CDT
In force: 3 hr
Issued by: NWS Midland/Odessa, TX
Area: Storm-based polygon
Flood severity: None

County Terrell County, TX

The radar

The Midland/Odessa radar (KMAF), 185 km from the middle of the area, began a volume at 02:22 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

Del Rio, TX (KDRT), launched 00:00Z, 2.3 hours before the alert went out and 153 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: 205 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1913 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KMAF 010219
FFWMAF
TXC443-010515-
/O.NEW.KMAF.FF.W.0021.080701T0219Z-080701T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
919 PM CDT MON JUN 30 2008

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  TERRELL COUNTY IN SOUTHWEST TEXAS...

* UNTIL 1215 AM CDT

* AT 913 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
  THUNDERSTORMS ACROSS A LARGE PART OF THE COUNTY CAPABLE  OF 
  PRODUCING MODERATE TO HEAVY RAINFALL...WHICH CAN RESULT IN FLASH
  FLOODING. RADAR INDICATED PRECIPITATION IS DECREASING SLIGHTLY IN 
  INTENSITY OVER THE AREA. HOWEVER...RECENTLY FALLEN RAIN WILL TAKE 
  SOME TIME TO RECEDE...AND POTENTIAL FOR MORE THUNDERSTORMS EXISTS 
  WHICH MAY LEAD TO MORE FLASH FLOODING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE TERRELL
  GAS PLANT...
  TEXAS STATE HIGHWAY 349...
  FARM TO MARKET ROAD 2400...

ADDITIONAL RAINFALL IS EXPECTED WHICH COULD INCREASE THE POTENTIAL
FOR FLOODING IN THE WARNED AREA.

FLASH FLOODING OF CREEKS AND STREAMS... LOW WATER CROSSINGS...
NORMALLY DRY WASHES AND ARROYOS... AND LOW LYING FARMLAND IS LIKELY.
DO NOT DRIVE ACROSS FLOODED ROADS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

LAT...LON 2980 10216 2984 10225 3008 10257 3027 10257
      3027 10236 3060 10237 3060 10214 3066 10214
      3066 10168 3063 10164 3055 10163 3042 10172
      3034 10165 3033 10172 3028 10175 2978 10176
TIME...MOT...LOC 0215Z 180DEG 0KT 3033 10200

$$

1 follow-up statement

000 
WGUS74 KMAF 010411
FFSMAF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
1111 PM CDT MON JUN 30 2008

TXC443-010515-
/O.CON.KMAF.FF.W.0021.000000T0000Z-080701T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TERRELL-
1111 PM CDT MON JUN 30 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR
TERRELL COUNTY...

AT 1106 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING HEAVY RAIN RESULTING IN POSSIBLE 
FLASH FLOODING.  THIS STORM WAS LOCATED NEAR DRYDEN...MOVING 
NORTHWEST AT 14 MPH.

THE THUNDERSTORM PRODUCING FLASH FLOODING WILL AFFECT THE FOLLOWING
LOCATIONS...DRYDEN AND SANDERSON.

MOST FLOODING DEATHS ARE PREVENTABLE... AND MANY OCCUR WHEN MOTORISTS
DRIVE ACROSS FLOODED ROADWAYS. IT IS NEVER SAFE TO DRIVE ON FLOODED
ROADS. IT TAKES ONLY A FEW INCHES OF RAPIDLY FLOWING WATER TO QUICKLY
CARRY AWAY YOUR VEHICLE. TURN AROUND... DONT DROWN.

LAT...LON 2980 10216 2984 10225 3008 10257 3027 10257
      3027 10236 3060 10237 3060 10214 3066 10214
      3066 10168 3063 10164 3055 10163 3042 10172
      3034 10165 3033 10172 3028 10175 2978 10176
TIME...MOT...LOC 0410Z 120DEG 12KT 3003 10212

$$

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 7:19 PM CDT	River Flood Warning	MAF	Presidio	14 hr
Jun 30, 8:40 PM CDT	Severe Thunderstorm Warning	MAF	Terrell	23 min
Jun 30, 9:45 PM CDT	River Flood Warning	MAF	Presidio	12 hr

Nearby

Flash Flood Warnings in Texas, 2008 Every flash flood warning in 2008

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.