Alert archive / Texas / Flash Flood Warnings in 2018

Flash Flood Warning 21, NWS Shreveport, LA

February 23, 20187 counties in Texas

NWS Shreveport, LA issued this flash flood warning at Feb 23, 2018, 2:15 AM CST for 7 counties in Texas. It was in force for 6 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 23, 2018, 2:15 AM CST (08:15 UTC)
Expired: Feb 23, 2018, 8:15 AM CST
In force: 6 hr
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Flood severity: None

Counties Camp County, TX, Franklin County, TX, Morris County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 125 km from the middle of the area, began a volume at 08:19 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
Feb 23, 2:47 AM CST	FLASH FLOOD	4 Ne Mineola, TX	HIGH WATER REPORTED ALONG FM 1254 NORTHEAST OF MINEOLA.

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

The nearest sounding before it

Shreveport, LA (KBAD), launched 00:00Z, 8.3 hours before the alert went out and 132 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: 124 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 422 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 290 m²/s²
0-3 km storm-relative helicity: 380 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

As transmitted.

054 
WGUS54 KSHV 230815
FFWSHV
TXC063-159-343-423-449-459-499-231415-
/O.NEW.KSHV.FF.W.0021.180223T0815Z-180223T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Shreveport LA
215 AM CST FRI FEB 23 2018

The National Weather Service in Shreveport has issued a

* Flash Flood Warning for...
  Smith County in northeastern Texas...
  Franklin County in northeastern Texas...
  Wood County in northeastern Texas...
  Upshur County in northeastern Texas...
  Morris County in northeastern Texas...
  Titus County in northeastern Texas...
  Camp County in northeastern Texas...

* Until 815 AM CST Friday

* At 214 AM CST, Doppler radar indicated heavy rain across the 
  warned area. Flash flooding is expected to begin shortly. Rainfall 
  rates of near one inch per hour will be common through the early 
  morning hours.  

* Some locations that will experience flooding include...
  Tyler, Mount Pleasant, Whitehouse, Gladewater, Gilmer, Mineola,
  Pittsburg, Winnsboro, Hagansport, Leesburg, Lindale, Chandler,
  Mount Vernon, Daingerfield, Overton, Bullard, Troup, Quitman, Lone
  Star and Naples.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3296 9531 3338 9531 3338 9483 3332 9478
      3331 9469 3327 9465 3288 9466 3288 9471
      3284 9467 3282 9470 3266 9470 3254 9499
      3214 9499 3213 9546 3223 9549 3236 9545
      3248 9559 3269 9559 3272 9564 3296 9567

$$

13

2 follow-up statements

267 
WGUS74 KSHV 231004
FFSSHV

Flash Flood Statement
National Weather Service Shreveport LA
404 AM CST FRI FEB 23 2018

TXC423-231012-
/O.CAN.KSHV.FF.W.0021.000000T0000Z-180223T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Smith TX-
404 AM CST FRI FEB 23 2018

...THE FLASH FLOOD WARNING FOR SMITH COUNTY IS CANCELLED...

Heavy rainfall has moved out of the county. Additional flooding is 
no longer expected to pose a threat. Please continue to heed any 
remaining road closures.

LAT...LON 3296 9531 3338 9531 3338 9483 3332 9478
      3331 9469 3327 9465 3288 9466 3288 9471
      3284 9468 3266 9470 3266 9476 3252 9502
      3255 9502 3254 9503 3257 9515 3254 9519
      3260 9533 3261 9547 3272 9564 3296 9567

$$

TXC063-159-343-449-459-499-231415-
/O.CON.KSHV.FF.W.0021.000000T0000Z-180223T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin TX-Wood TX-Upshur TX-Morris TX-Titus TX-Camp TX-
404 AM CST FRI FEB 23 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 AM CST FOR
FRANKLIN...WOOD...UPSHUR...MORRIS...TITUS AND CAMP COUNTIES...

At 402 AM CST, Doppler radar indicated heavy rain across the warned 
area.  Flash flooding is likely ongoing at this time across 
portions of the region. 

Some locations that will experience flooding include...
Mount Pleasant, Gladewater, Gilmer, Mineola, Pittsburg, Winnsboro,
Hagansport, Leesburg, Mount Vernon, Daingerfield, Quitman, Lone Star,
Naples, Big Sandy, Hawkins, Ore City, Omaha, East Mountain, Cason and
Us 259 And I 30 Intersection.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3296 9531 3338 9531 3338 9483 3332 9478
      3331 9469 3327 9465 3288 9466 3288 9471
      3284 9468 3266 9470 3266 9476 3252 9502
      3255 9502 3254 9503 3257 9515 3254 9519
      3260 9533 3261 9547 3272 9564 3296 9567

$$

13

498 
WGUS74 KSHV 231044
FFSSHV

Flash Flood Statement
National Weather Service Shreveport LA
444 AM CST FRI FEB 23 2018

TXC459-499-231052-
/O.CAN.KSHV.FF.W.0021.000000T0000Z-180223T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wood TX-Upshur TX-
444 AM CST FRI FEB 23 2018

...THE FLASH FLOOD WARNING FOR WOOD AND UPSHUR COUNTIES IS
CANCELLED...

Heavy rainfall has moved out of the county. Additional flooding is 
no longer expected to pose a threat. Please continue to heed any 
remaining road closures.

LAT...LON 3338 9531 3337 9526 3338 9521 3338 9483
      3332 9478 3331 9469 3330 9469 3327 9465
      3288 9466 3288 9471 3289 9471 3290 9472
      3290 9515 3300 9515 3296 9517 3296 9531

$$

TXC063-159-343-449-231415-
/O.CON.KSHV.FF.W.0021.000000T0000Z-180223T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin TX-Morris TX-Titus TX-Camp TX-
444 AM CST FRI FEB 23 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 AM CST FOR
FRANKLIN...MORRIS...TITUS AND CAMP COUNTIES...

At 442 AM CST, Doppler radar continued to indicate moderate rainfall 
across the warned area.  Flash flooding is likely already occurring 
across portions of the warned area. 

Some locations that will experience flooding include...
Mount Pleasant, Pittsburg, Winnsboro, Leesburg, Hagansport, Mount
Vernon, Daingerfield, Lone Star, Naples, Omaha, Cason, Us 259 And I
30 Intersection, Cookville, Scroggins, Rocky Branch, Wilkerson,
Jenkins, Newsome, Purley and Winfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3338 9531 3337 9526 3338 9521 3338 9483
      3332 9478 3331 9469 3330 9469 3327 9465
      3288 9466 3288 9471 3289 9471 3290 9472
      3290 9515 3300 9515 3296 9517 3296 9531

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 22, 8:35 PM CST	Areal Flood Advisory	SHV	Nacogdoches, San Augustine, Shelby	115 min
Feb 22, 9:32 PM CST	Areal Flood Advisory	SHV	San Augustine, Shelby	58 min
Feb 23, 4:07 AM CST	Areal Flood Warning	SHV	Smith	3 hr
Feb 23, 4:20 AM CST	Flash Flood Warning	SHV	Bowie, Cass	4 hr
Feb 23, 4:46 AM CST	Areal Flood Warning	SHV	Upshur, Wood	3 hr
Feb 23, 10:08 AM CST	River Flood Warning	SHV	Cass, Harrison, Marion	15 days
Feb 23, 3:30 PM CST	Lake Wind Advisory	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	27 hr

Nearby

Flash Flood Warnings in Texas, 2018 Every flash flood warning in 2018

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.