Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 38, NWS Shreveport, LA
NWS Shreveport, LA issued this flash flood warning at Sep 29, 2012, 10:18 PM CDT for 5 counties in Texas. It was in force for 4 hr. 2 reports 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
- Sep 29, 2012, 10:18 PM CDT (03:18 UTC)
- Expired
- Sep 30, 2012, 2:15 AM CDT
- In force
- 4 hr
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Angelina County, TX, Cherokee County, TX, Nacogdoches County, TX, San Augustine County, TX, Shelby County, TX
The radar
The Shreveport radar (KSHV), 125 km from the middle of the area, began a volume at 03:21 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 |
|---|---|---|---|
| Sep 29, 11:30 PM CDT | FLASH FLOOD | 5 W Nacogdoches, TX | VEHICLES WRECKED...HYDROPLANING...OR STALLED OUT. HWY 21 WEST AND HWY 7 WEST. |
| Sep 30, 2:08 AM CDT | FLASH FLOOD | 5 W Nacogdoches, TX | BRIDGE WASHED OUT WEST OF TOWN. |
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 00:00Z, 3.3 hours before the alert went out and 133 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 578 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 273 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
354
WGUS54 KSHV 300318
FFWSHV
TXC005-073-347-405-419-300715-
/O.NEW.KSHV.FF.W.0038.120930T0318Z-120930T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1018 PM CDT SAT SEP 29 2012
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN ANGELINA COUNTY IN EASTERN TEXAS...
NACOGDOCHES COUNTY IN EASTERN TEXAS...
THIS INCLUDES THE CITY OF NACOGDOCHES...
EXTREME NORTHWESTERN SAN AUGUSTINE COUNTY IN EASTERN TEXAS...
WESTERN SHELBY COUNTY IN EASTERN TEXAS...
SOUTHEASTERN CHEROKEE COUNTY IN NORTHEAST TEXAS...
* UNTIL 215 AM CDT
* AT 1009 PM CDT...VERY HEAVY RAIN WAS REPORTED FROM A THUNDERSTORM
OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TRAWICK...
TIMPSON...MARTINSVILLE...GARRISON...DOUGLASS AND ALTO...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE IN THE
WARNED AREA.
&&
LAT...LON 3133 9492 3135 9496 3139 9496 3144 9504
3170 9520 3185 9479 3185 9446 3195 9451
3198 9444 3198 9435 3167 9419 3130 9490
$$
05The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 2:01 AM CDT | Flash Flood Warning | SHV | Angelina, Nacogdoches, Panola, San Augustine, Shelby | 4 hr |
| Sep 30, 3:56 AM CDT | Lake Wind Advisory | SHV | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more | 12 hr |
| Sep 30, 4:47 AM CDT | River Flood Warning | SHV | Nacogdoches, Panola, Rusk, San Augustine, Shelby | 4 days |
| Sep 30, 4:49 AM CDT | River Flood Warning | SHV | Sabine, San Augustine | 32 hr |
| Sep 30, 9:31 AM CDT | River Flood Warning | SHV | Angelina, Cherokee, Nacogdoches | 5 days |
Nearby
Flash Flood Warnings in Texas, 2012Every flash flood warning in 2012
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.