Flash Flood Warning 25, NWS Shreveport, LA

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SHREVEPORT LA
139 PM CDT SUN MAY 10 2009

.DISCUSSION...
UPDATED ZONES AND REC FOR SVR WATCH 286. /12/

&&

.PREV DISCUSSION... /ISSUED 1049 AM CDT SUN MAY 10 2009/

DISCUSSION...
SFC BOUNDARY NOTED ROUGHLY ALONG A LINE FROM JUST NORTH OF
TYLER...TO SHREVEPORT...TO MONROE. OVERRUNNING CONVECTION
CONTINUES ALONG THE RED RIVER OF TX/OK AND INTO SW AR...WHERE SOME
4 TO 8 INCHES OF RAIN HAS ALREADY FALLEN IN THE LAST 24 HRS. FROM
WHAT 12Z DATA IS IN...UPPER LEVEL IMPULSES IN THE ZONAL FLOW WILL
CONTINUE TO RIDE ALONG THE FRONTAL BOUNDARY...THEREFORE CONTINUING
THE FLOODING THREAT FOR EXTREME NE TX/SE OK/AND SW AR THROUGH AT
LEAST MONDAY MORNING. THAT BEING SAID...MADE A FEW TWEAKS TO THE
POPS FOR THIS AFTN...LOWERING IN THE S. ALSO MADE MINOR ADJUSTMENTS
TO MAX TEMPS BASED ON THE LOCATION OF THE FRONT. IF IT WAFFLES TO
MUCH MORE TO THE N...MAX TEMP FCST MAY BE A BIT UNDER DONE FOR
THOSE ARES ALONG THE FRONT. OTHERWISE...NO OTHER CHANGES APPEAR
NECESSARY. /12/

AVIATION...
FRONTAL BOUNDARY CURRENTLY ALONG THE I20 CORRIDOR...AND AFTER
LIFTING SOME THIS MORNING IT IS NOW SHOWING SOME SIGNS OF BECOMING
STATIONARY AGAIN. VFR CLOUD CONDITIONS ARE PROGRESSING SOUTH OF THE
BOUNDARY...WHILE IFR TO MVFR CONDITIONS ARE BEING OBSERVED ALONG AND
NORTH OF THE BOUNDARY. TSRA ACTIVITY CONTINUES TO TRACK ALONG THE
I30 CORRIDOR...AND CONVECTION IS BEGINNING TO FIRE CLOSE TO THE
BOUNDARY IN PARTS OF NORTHERN LOUISIANA. TEMPO TSRA WILL BE COMMON
AT MOST TAF SITES IN THE 18Z PACKAGE...ALTHOUGH THE LFK MAY SEE LESS
ACTIVITY. /11/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  83  65  78  64  83 /  50  30  50  30  30
MLU  83  65  76  63  81 /  50  40  50  30  30
DEQ  70  60  66  59  78 /  70  70  80  40  40
TXK  73  59  69  60  80 /  70  60  80  40  40
ELD  79  59  69  61  78 /  60  50  80  40  40
TYR  84  65  78  64  85 /  30  30  50  20  20
GGG  83  64  79  63  85 /  30  20  50  30  30
LFK  88  68  85  69  87 /  30  20  30  20  20

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...FLASH FLOOD WATCH THROUGH MONDAY MORNING FOR THE FOLLOWING
     ZONES: ARZ050-051-059>061-070>073.

LA...NONE.
OK...FLASH FLOOD WATCH THROUGH MONDAY MORNING FOR THE FOLLOWING
     ZONES: OKZ077.

TX...FLASH FLOOD WATCH THROUGH MONDAY MORNING FOR THE FOLLOWING
     ZONES: TXZ096-097.

&&

12/11

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1130 AM CDT SUN MAY 10 2009

ARZ050-051-059>061-070>073-OKZ077-TXZ096-097-111200-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION AR-MCCURTAIN-RED RIVER-BOWIE-
1130 AM CDT SUN MAY 10 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...SOUTHEAST OKLAHOMA AND NORTHEAST
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

STRONG TO SEVERE THUNDERSTORMS WITH DAMAGING WINDS AND LARGE HAIL WILL
BE POSSIBLE TODAY AND TONIGHT...AS A SERIES OF UPPER LEVEL DISTURBANCES
CONTINUE TO MOVE THROUGH THE REGION. HOWEVER...HEAVY RAINFALL ALONG
WITH FLASH FLOODING WILL BE THE MOST SIGNIFICANT THREAT...CONSIDERING
THAT 4 TO JUST OVER 8 INCHES OF RAIN HAS FALLEN IN THE PREVIOUS 24
HOURS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THE THREAT FOR FLASH FLOODING AND SEVERE THUNDERSTORMS WILL
CONTINUE THROUGH AT LEAST MONDAY EVENING. RAINFALL TOTALS OVER
THIS REGION MAY END UP NEAR 10 INCHES BEFORE THE RAIN FINALLY
MOVES OUT. TUESDAY INTO WEDNESDAY LOOKS TO BRING DRIER AIR INTO
THE AREA...BUT THURSDAY MAY BRING ANOTHER COLD FRONT AND MORE RAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY AND TONIGHT.

LAZ001>006-010>014-017>022-TXZ108>112-124>126-136>138-149>153-
165>167-111200-
CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-UNION LA-DE SOTO-
RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA-NATCHITOCHES-WINN-
GRANT-CALDWELL-LA SALLE-FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-
UPSHUR-MARION-SMITH-GREGG-HARRISON-CHEROKEE-RUSK-PANOLA-
NACOGDOCHES-SHELBY-ANGELINA-SAN AUGUSTINE-SABINE TX-
1130 AM CDT SUN MAY 10 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
LOUISIANA...NORTHWEST LOUISIANA...EAST TEXAS AND NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SCATTERED AFTERNOON SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG A
FRONTAL BOUNDARY TODAY. THERE IS A SLIGHT CHANCE THAT SOME OF
THESE STORMS MAY BECOME SEVERE...WITH LARGE HAIL AND DAMAGING
WINDS BEING THE MAIN THREAT. THIS ACTIVITY WILL LIKELY DISSIPATE
SHORTLY AFTER SUNSET.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THE CHANCES FOR AFTERNOON SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH
AT LEAST MONDAY. SOME OF THE STORMS COULD BECOME SEVERE...PRODUCING
DAMAGING WINDS AND LARGE HAIL. TUESDAY INTO WEDNESDAY LOOKS TO BRING
DRIER AIR INTO THE AREA...BUT THURSDAY MAY BRING ANOTHER COLD
FRONT AND MORE SHOWERS AND THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY NOT BE NEEDED TODAY OR TONIGHT.

12

<!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>

<!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>

<!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>

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1035 AM CDT SUN MAY 10 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1025 AM     FLASH FLOOD      N TEXARKANA             33.44N 94.07W
05/10/2009                   BOWIE              TX   EMERGENCY MNGR

            CAR STALLED IN HIGH WATER ON COOPER LANE IN THE EXTREME
            NORTHERN PORTION OF TEXARKANA.

&&

MBERRY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1037 AM CDT SUN MAY 10 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1025 AM     FLASH FLOOD      REDWATER                33.36N 94.25W
05/10/2009                   BOWIE              TX   EMERGENCY MNGR

            HIGH WATER REPORTED ON TRISTATE ROAD IN REDWATER.

&&

MBERRY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
139 PM CDT SUN MAY 10 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0138 PM     FLASH FLOOD      VALLIANT                34.00N 95.09W
05/10/2009                   MCCURTAIN          OK   EMERGENCY MNGR

            NUMEROUS STATE HIGHWAYS AND ROADS CLOSED. RESCUING PEOPLE
            FROM CARS WASHED OFF ROADS. WATER IN HOUSES CAUSING
            EVACUATIONS.

&&

STEVENS