Alert archive / Texas / Flash Flood Watches in 2017

Flash Flood Watch 6, NWS Shreveport, LA

August 12, 201710 counties in Texas; 7 counties in Arkansas

NWS Shreveport, LA issued this flash flood watch at Aug 12, 2017, 5:13 AM CDT for 10 counties in Texas; 7 counties in Arkansas. It took effect at Aug 13, 2017, 12:00 AM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Aug 12, 2017, 5:13 AM CDT (10:13 UTC)
In effect from
Aug 13, 2017, 12:00 AM CDT
Expired
Aug 13, 2017, 10:03 AM CDT
In force
10 hr
Issued by
NWS Shreveport, LA
Flood severity
None

Counties Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, Bowie County, TX, Camp County, TX, Cass County, TX, Franklin County, TX, Marion County, TX, Morris County, TX, Red River 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 10:15 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 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 11, 11:41 PM CDT, 5 hours 32 minutes earlier.

Area forecast discussion, Aug 11, 11:41 PM CDT, 5 hours 32 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Aug 11, 11:44 AM CDT, 17 hours 29 minutes before
Hazardous Weather Outlook
National Weather Service Shreveport LA
1144 AM CDT Fri Aug 11 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>167-121645-
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-
1144 AM CDT Fri Aug 11 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...

Remnants of a complex of showers and thunderstorms and an
attendant upper level disturbance over Southern and Eastern
Oklahoma will trigger scattered showers and thunderstorms this
afternoon over portions of Northeast Texas, Southeast Oklahoma,
Southwest Arkansas, and North Louisiana, especially as the air
mass destabilizes with daytime heating. Isolated strong storms
capable of producing gusty winds and brief heavy rainfall will be
possible, with minor flooding of low lying, poor drainage areas
possible as well in the slow moving storms. Isolated to scattered
showers and thunderstorms should continue into this evening before
gradually diminishing late.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

Scattered showers and thunderstorms will remain possible over much
of the region Saturday, as a weak surface front becomes stationary
over portions of East Texas and North Louisiana, and weak upper
level disturbances aloft traverse the front. Isolated strong
storms capable of producing gusty winds and brief heavy rainfall
will be possible along the frontal zone Saturday, but the threat
for heavy rainfall and flash flooding will increase late Saturday
night through Monday as another thunderstorm complex develops and
moves east along the front. The front may begin to slowly lift
back north late Monday, thus diminishing the heavy rainfall and
flood threats. Showers and thunderstorms are expected to become
more isolated to widely scattered Tuesday through Thursday, but
new rises along the Red and Sulphur Rivers and their tributaries
are likely for much of next week.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency managers, spotter networks, and amateur
radio operators, may be needed tonight.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 5:02 AM CDTHeat AdvisorySHVAngelina, Cherokee, Gregg, Harrison, Nacogdoches, Panola and 7 more14 hr
Aug 12, 4:03 PM CDTSpecial Weather StatementSHVMarion42 min
Aug 12, 4:49 PM CDTSpecial Weather StatementSHVHarrison, Marion41 min
Aug 12, 5:31 PM CDTSpecial Weather StatementSHVHarrison, Panola44 min
Aug 11, 7:05 PM CDTSpecial Weather StatementSHVDe Soto40 min
Aug 11, 7:54 PM CDTSpecial Weather StatementSHVRed River51 min
Aug 11, 8:30 PM CDTSpecial Weather StatementSHVNatchitoches45 min
Aug 12, 6:03 PM CDTSpecial Weather StatementSHVCaddo57 min
Aug 11, 8:32 PM CDTRiver Flood WarningSHVAshley, Union30 hr

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; radar from the NEXRAD Level II archive.