Alert archive / Texas / Flash Flood Watches in 2017
Flash Flood Watch 4, NWS Shreveport, LA
NWS Shreveport, LA issued this flash flood watch at Aug 6, 2017, 3:47 PM CDT for 12 counties in Texas; 4 counties in Arkansas. It took effect at Aug 6, 2017, 7:00 PM CDT. It was in force for 16 hr.
The area
The counties it named.
The facts
- Issued
- Aug 6, 2017, 3:47 PM CDT (20:47 UTC)
- In effect from
- Aug 6, 2017, 7:00 PM CDT
- Expired
- Aug 7, 2017, 10:59 AM CDT
- In force
- 16 hr
- Issued by
- NWS Shreveport, LA
- Flood severity
- None
Counties Howard County, AR, Little River County, AR, Miller County, AR, Sevier County, AR, Bowie County, TX, Camp County, TX, Cass County, TX, Franklin County, TX, Gregg County, TX, Marion County, TX, Morris County, TX, Red River County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 113 km from the middle of the area, began a volume at 20:47 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
Shreveport, LA (KBAD), launched 12:00Z, 8.8 hours before the alert went out and 117 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
- 468 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 831 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Shreveport, LA wrote its last area forecast discussion before this flash flood watch went out at Aug 6, 1:20 PM CDT, 2 hours 27 minutes earlier.
Area forecast discussion, Aug 6, 1:20 PM CDT, 2 hours 27 minutes before
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</html>Hazardous weather outlook, Aug 6, 12:06 PM CDT, 3 hours 41 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 1206 PM CDT Sun Aug 6 2017 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-071200- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn- Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp- Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk- Panola-Nacogdoches-Shelby-Angelina-San Augustine- 1206 PM CDT Sun Aug 6 2017 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, north central Louisiana, northwest Louisiana, southeast Oklahoma, east Texas and northeast Texas. .DAY ONE...This Afternoon and Tonight... Showers and thunderstorms will slowly spread southeast across portions of Northeast Texas, Southern Arkansas, and into extreme Northern Louisiana this afternoon, along and behind a weak surface boundary, and ahead of an upper level disturbance over Oklahoma and extreme Northern Texas. Some of the stronger storms will be capable of producing locally heavy rainfall and gusty winds, with minor flooding of low lying, poor drainage areas possible especially over portions of extreme Northeast Texas. Farther south across Deep East Texas and Northcentral Louisiana, isolated to widely scattered showers and thunderstorms will be possible this afternoon and tonight, with brief heavy rainfall possible. Additional shower and thunderstorm development will occur later tonight across Northeast Texas, extreme Southeast Oklahoma, Southwest Arkansas and possibly extreme Northern Louisiana, as a series of weak upper level disturbances approach the region from the west. Locally heavy rainfall and the threat for flash flooding will be possible. .DAYS TWO THROUGH SEVEN...Monday through Saturday... Showers and thunderstorms will be ongoing across much of the region Monday morning, which should spread southward across Deep East Texas and Northcentral Louisiana during the day. The threat for heavy rainfall and localized flash flooding will be possible Monday, with showers and thunderstorms expected to gradually diminish late in the day. Additional scattered to numerous shower and thunderstorm development is possible over the region Tuesday, as weak upper level disturbances interact with a weak surface front, which could result in localized flash flooding. Showers and thunderstorms should become more isolated to scattered Wednesday through Saturday as the unsettled weather pattern will continue. Brief heavy rainfall, minor flooding of low lying, poor drainage areas, and gusty winds will be possible from the stronger storms Wednesday through Saturday. .SPOTTER INFORMATION STATEMENT... Activation of emergency managers, spotter networks, and amateur radio operators, may be needed tonight over portions of Northeast Texas, Southeast Oklahoma, Southwest Arkansas, and possibly extreme Northern Louisiana. 15
In the hours before
Special weather statement, Aug 6, 10:30 AM CDT, 5 hours 17 minutes before
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</html>The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 4:18 AM CDT | Lake Wind Advisory | SHV | Camp, Cass, Cherokee, Franklin, Gregg, Harrison and 8 more | 6 hr |
| Aug 6, 8:39 AM CDT | Special Weather Statement | SHV | Bowie, Red River | 51 min |
| Aug 6, 9:30 AM CDT | Special Weather Statement | SHV | Bowie | 60 min |
| Aug 6, 8:06 AM CDT | Special Weather Statement | SHV | Sevier | 54 min |
| Aug 6, 10:30 AM CDT | Special Weather Statement | SHV | Nevada | 30 min |
Nearby
Flash Flood Watches in Texas, 2017Flash Flood Watches in Arkansas, 2017Every flash flood watch in 2017
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.