Alert archive / Texas / Flash Flood Warnings in 2009

Flash Flood Warning 32, NWS Fort Worth, TX

May 2, 20094 counties in Texas

NWS Fort Worth, TX issued this flash flood warning at May 2, 2009, 10:56 PM CDT for 4 counties in Texas. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 2, 2009, 10:56 PM CDT (03:56 UTC)
Expired: May 3, 2009, 1:00 AM CDT
In force: 2 hr
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Flood severity: None

Counties Collin County, TX, Hunt County, TX, Kaufman County, TX, Rockwall County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 100 km from the middle of the area, began a volume at 03:58 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

Fort Worth, TX (KFWD), launched 00:00Z, 3.9 hours before the alert went out and 90 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: 402 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 497 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this flash flood warning went out at May 2, 10:29 PM CDT, 27 minutes earlier.

Area forecast discussion, May 2, 10:29 PM CDT, 27 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, May 2, 4:00 PM CDT, 6 hours 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
400 PM CDT SAT MAY 2 2009

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-031100-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
400 PM CDT SAT MAY 2 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THROUGH TONIGHT.
STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS NORTH TEXAS
THROUGH THE EVENING HOURS. LARGE HAIL...DAMAGING WINDS...AND
HEAVY RAIN WILL BE THE PRIMARY HAZARDS. IN ADDITION...THERE IS THE
POTENTIAL FOR A STORM TO BECOME TORNADIC...PARTICULARLY NEAR OR
SOUTH OF A SLOW-MOVING COLD FRONT.

THUNDERSTORMS WILL CONTINUE OVERNIGHT. THE GREATEST LIKELIHOOD OF
HEAVY RAIN WILL BE NORTHEAST OF THE DALLAS/FORT WORTH METROPLEX.
A FLASH FLOOD WATCH REMAINS IN EFFECT GENERALLY ALONG AND NORTH OF
THE I-20 CORRIDOR.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
THE THREAT OF SEVERE THUNDERSTORMS AND HEAVY RAINFALL WILL
CONTINUE ON SUNDAY...WITH THE FLASH FLOOD WATCH REMAINING IN
EFFECT THROUGH NOON. THE THUNDERSTORMS WILL RAPIDLY COME TO AN END
SUNDAY AFTERNOON.

THUNDERSTORMS WILL RETURN TO THE FORECAST TUESDAY AFTERNOON...AND
CHANCES WILL CONTINUE THROUGH WEDNESDAY NIGHT AS A COLD FRONT
MOVES THROUGH NORTH TEXAS. THUNDERSTORM CHANCES WILL RETURN AGAIN
IN TIME FOR THE WEEKEND.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL LIKELY BE REQUESTED THROUGH THE EVENING
HOURS.

25

In the hours before

Local storm report, May 2, 9:33 PM CDT, 1 hour 23 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>

Local storm report, May 2, 9:35 PM CDT, 1 hour 21 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>

Special weather statement, May 2, 9:36 PM CDT, 1 hour 20 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>

Local storm report, May 2, 9:39 PM CDT, 1 hour 17 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>

Local storm report, May 2, 9:56 PM CDT, 1 hour 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>

Local storm report, May 2, 10:15 PM CDT, 41 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>

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 2, 7:09 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Hopkins, Hunt, Rains, Van Zandt	66 min
May 2, 7:13 PM CDT	Severe Thunderstorm Warning	FWD	Denton	62 min
May 2, 7:24 PM CDT	Flash Flood Warning	FWD	Denton	3 hr
May 2, 7:42 PM CDT	Flash Flood Warning	FWD	Hopkins, Rains, Van Zandt	3 hr
May 2, 8:27 PM CDT	Severe Thunderstorm Warning	FWD	Denton, Parker, Tarrant, Wise	63 min
May 2, 8:48 PM CDT	Flash Flood Warning	FWD	Tarrant	107 min
May 2, 8:49 PM CDT	River Flood Warning	FWD	Hunt	37 hr
May 2, 8:49 PM CDT	River Flood Warning	FWD	Hunt, Rockwall	43 hr
May 2, 8:59 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Hill	46 min
May 2, 9:20 PM CDT	River Flood Warning	FWD	Collin	37 hr
May 2, 9:20 PM CDT	River Flood Warning	FWD	Dallas	39 hr
May 2, 9:24 PM CDT	Flash Flood Warning	FWD	Grayson	83 min
May 2, 9:29 PM CDT	Severe Thunderstorm Warning	FWD	Hunt, Kaufman, Rains, Van Zandt	46 min
May 2, 9:36 PM CDT	Special Weather Statement	FWD	Collin, Denton, Rockwall	24 min
May 2, 9:39 PM CDT	Flash Flood Warning	FWD	Dallas	2 hr
May 2, 9:41 PM CDT	Areal Flood Advisory	FWD	Ellis	94 min
May 2, 9:46 PM CDT	Severe Thunderstorm Warning	FWD	Dallas, Ellis	48 min
May 2, 9:58 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas, Fannin, Grayson, Rockwall	32 min
May 2, 10:09 PM CDT	Severe Thunderstorm Warning	FWD	Kaufman, Rockwall	66 min
May 2, 10:14 PM CDT	Severe Thunderstorm Warning	FWD	Fannin, Hunt	61 min
May 2, 10:26 PM CDT	Areal Flood Warning	FWD	Denton	4 hr
May 2, 10:37 PM CDT	Flash Flood Warning	FWD	Hopkins, Rains, Van Zandt	3 hr
May 2, 10:44 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Hopkins, Lamar, Rains	76 min
May 2, 10:50 PM CDT	Areal Flood Advisory	FWD	Delta, Fannin, Lamar	3 hr
May 2, 10:57 PM CDT	River Flood Warning	FWD	Denton	11 hr
May 2, 11:07 PM CDT	Special Weather Statement	FWD	Van Zandt	38 min
May 2, 11:27 PM CDT	River Flood Warning	FWD	Dallas	9 hr
May 2, 11:38 PM CDT	Areal Flood Warning	FWD	Dallas	3 hr
May 2, 11:43 PM CDT	River Flood Warning	FWD	Dallas	9 hr
May 2, 11:50 PM CDT	Special Weather Statement	FWD	Van Zandt	25 min
May 3, 12:53 AM CDT	Special Weather Statement	FWD	Hopkins	22 min
May 3, 1:05 AM CDT	Special Weather Statement	FWD	Hunt	25 min
May 3, 1:32 AM CDT	Areal Flood Warning	FWD	Hopkins, Rains, Van Zandt	3 hr
May 3, 1:50 AM CDT	River Flood Warning	FWD	Delta, Hopkins	21 hr
May 3, 2:13 AM CDT	Special Weather Statement	FWD	Comanche	32 min
May 3, 2:29 AM CDT	Areal Flood Warning	FWD	Dallas	4 hr
May 3, 2:36 AM CDT	River Flood Warning	FWD	Collin	19 hr
May 3, 2:38 AM CDT	Severe Thunderstorm Warning	FWD	Hood, Johnson, Parker, Tarrant	49 min
May 3, 2:40 AM CDT	Special Weather Statement	FWD	Kaufman	35 min
May 3, 2:44 AM CDT	Special Weather Statement	FWD	Bosque	31 min
May 3, 3:00 AM CDT	Severe Thunderstorm Warning	FWD	Mills	37 min
May 3, 3:05 AM CDT	Special Weather Statement	FWD	Collin	25 min
May 3, 3:07 AM CDT	Special Weather Statement	FWD	Bosque	23 min
May 3, 3:30 AM CDT	Special Weather Statement	FWD	Dallas	30 min
May 3, 3:42 AM CDT	Severe Thunderstorm Warning	FWD	Lampasas	32 min
May 3, 3:53 AM CDT	Severe Thunderstorm Warning	FWD	Ellis, Hill, Navarro	67 min
May 3, 3:56 AM CDT	Flash Flood Warning	FWD	Collin, Dallas, Rockwall	2 hr
May 3, 4:16 AM CDT	Special Weather Statement	FWD	Bell, McLennan	29 min
May 3, 4:20 AM CDT	Flash Flood Warning	FWD	Hunt, Kaufman	3 hr
May 3, 4:41 AM CDT	Special Weather Statement	FWD	Kaufman, Rains, Van Zandt	34 min
May 3, 4:47 AM CDT	Special Weather Statement	FWD	Falls, Freestone, Limestone, Milam, Robertson	28 min
May 3, 5:03 AM CDT	Flash Flood Warning	FWD	Rains, Van Zandt	3 hr
May 3, 5:09 AM CDT	Severe Thunderstorm Warning	FWD	Henderson, Van Zandt	51 min
May 3, 5:13 AM CDT	Severe Thunderstorm Warning	FWD	Anderson, Falls, Freestone, Leon, Limestone, Milam and 2 more	92 min
May 3, 6:00 AM CDT	Severe Thunderstorm Warning	FWD	Henderson	41 min
May 3, 7:19 AM CDT	Areal Flood Warning	FWD	Hunt	4 hr
May 3, 7:59 AM CDT	Areal Flood Warning	FWD	Rains, Van Zandt	4 hr
May 3, 9:52 AM CDT	River Flood Warning	FWD	Henderson, Navarro	5 days

Nearby

Flash Flood Warnings in Texas, 2009 Every flash flood warning in 2009

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.