Alert archive / Texas / Flash Flood Warnings in 2007

Flash Flood Warning 21, NWS Shreveport, LA

June 16, 2007Smith County, Texas

NWS Shreveport, LA issued this flash flood warning at Jun 16, 2007, 9:50 AM CDT for Smith County, Texas. It took effect at Jun 16, 2007, 9:55 AM CDT. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 16, 2007, 9:50 AM CDT (14:50 UTC)
In effect from: Jun 16, 2007, 9:55 AM CDT
Expired: Jun 16, 2007, 12:45 PM CDT
In force: 3 hr
Issued by: NWS Shreveport, LA
Area: Whole counties

County Smith County, TX

The radar

The Shreveport radar (KSHV), 134 km from the middle of the area, began a volume at 14:50 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.

What was reported inside it

Time	Report	Where	Remark
Jun 16, 11:23 AM CDT	FLASH FLOOD	5 S Lindale, TX	WATER OVER MULTIPLE SECONDARY ROADS IN NORTHERN PART OF SMITH CO.
Jun 16, 12:55 PM CDT	FLASH FLOOD	3 Ne Tyler, TX	FM 724...TX 110 N...FM 2015...AND NUMEROUS COUNTY ROADS ACROSS NORTHERN PART OF COUNTY CLOSED OR WASHED OUT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 2.8 hours before the alert went out and 143 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: 1020 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 505 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSHV 161455
FFWSHV
TXC423-161745-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
950 AM CDT SAT JUN 16 2007

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SMITH COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITIES OF...WHITEHOUSE...TYLER...

* UNTIL 1245 PM CDT

* AT 950 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  HEAVY RAINFALL PRODUCING THUNDERSTORMS COVERING ALL OF SMITH 
  COUNTY.  DOPPLER RADAR INDICATED UP TO 3 INCHES OF RAIN MAY HAVE 
  FALLEN SINCE 7 AM OVER NORTHWESTERN SMITH COUNTY...WITH RAINFALL 
  RATES OF 1.5 INCHES NOTED.  LOCAL LAW ENFORCEMENT REPORTED THAT 
  COUNTY ROAD 463 WAS ALREADY IMPASSIBLE DUE TO HIGH WATER.  WITH 
  ADDITIONAL THUNDERSTORMS EXPECTED TO MOVE INTO AND ACROSS THE 
  COUNTY...POSSIBLY PRODUCING ANOTHER 2 INCHES OF RAINFALL...
  ADDITIONAL FLOODING WILL BE POSSIBLE.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LINDALE

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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. MOVE TO HIGHER GROUND.

LAT...LON 3215 9545 3214 9500 3252 9500 3261 9549
      3267 9558 3250 9558 3236 9544

$$

BUTTS

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 16, 7:53 AM CDT	Flash Flood Warning	SHV	Upshur	3 hr
Jun 16, 11:24 AM CDT	Flash Flood Warning	SHV	Gregg, Upshur	4 hr
Jun 16, 12:49 PM CDT	Flash Flood Warning	SHV	Smith	86 min
Jun 16, 3:32 PM CDT	Flash Flood Watch	SHV	Angelina, Camp, Cherokee, Franklin, Gregg, Harrison and 12 more	24 hr

Nearby

Flash Flood Warnings in Texas, 2007 Every flash flood warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.