Alert archive / Virginia / Flash Flood Warnings in 2006

Flash Flood Warning 59, NWS Baltimore/Washington

June 26, 20065 counties in Virginia; Montgomery County, Maryland

NWS Baltimore/Washington issued this flash flood warning at Jun 26, 2006, 4:56 PM EDT for 5 counties in Virginia; Montgomery County, Maryland. It was in force for 6 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
Jun 26, 2006, 4:56 PM EDT (20:56 UTC)
Expired
Jun 26, 2006, 11:00 PM EDT
In force
6 hr
Issued by
NWS Baltimore/Washington
Area
Counties, with a storm outline in the text

Counties Montgomery County, MD, Arlington County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, Fairfax County, VA

The radar

The Sterling radar (KLWX), 28 km from the middle of the area, began a volume at 20:57 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.9 hours before the alert went out and 20 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-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2006-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 521 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2006-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 145 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
521 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
454 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
145 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.9

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 Baltimore/Washington wrote its last area forecast discussion before this flash flood warning went out at Jun 26, 3:41 PM EDT, 1 hour 15 minutes earlier.

Area forecast discussion, Jun 26, 3:41 PM EDT, 1 hour 15 minutes before
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Hazardous weather outlook, Jun 26, 2:15 PM EDT, 2 hours 41 minutes before
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    <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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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In the hours before

Local storm report, Jun 26, 11:07 AM EDT, 5 hours 49 minutes before
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    <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.
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Jun 26, 11:58 AM EDT, 4 hours 58 minutes before
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</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>
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Local storm report, Jun 26, 1:39 PM EDT, 3 hours 17 minutes before
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<head>
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</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>
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</body>
</html>
Local storm report, Jun 26, 4:01 PM EDT, 55 minutes before
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<head>
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  <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 Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 25, 8:51 PM EDTFlash Flood WarningLWXArlington, City of Alexandria, City of Falls Church4 hr
Jun 25, 11:43 PM EDTFlash Flood WarningLWXHighland4 hr
Jun 26, 12:26 AM EDTFlash Flood WarningLWXArlington, City of Alexandria, City of Falls Church3 hr
Jun 26, 3:44 AM EDTFlash Flood WarningLWXHighland3 hr
Jun 26, 6:41 AM EDTCoastal Flood StatementLWXArlington, Fairfax, King George, Stafford, City of Alexandria, City of Fairfax and 1 more109 min
Jun 26, 8:30 AM EDTCoastal Flood WarningLWXArlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church4 hr
Jun 26, 9:34 AM EDTFlash Flood WarningLWXAugusta, Highland, City of Staunton, City of Waynesboro6 hr
Jun 26, 10:49 AM EDTFlash Flood WarningLWXRockingham, City of Harrisonburg4 hr
Jun 26, 11:09 AM EDTFlash Flood WarningLWXArlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church6 hr
Jun 26, 12:13 PM EDTFlash Flood WarningLWXFauquier, Prince William, City of Manassas, City of Manassas Park6 hr
Jun 26, 1:06 PM EDTFlash Flood WarningLWXCulpeper, Orange, Spotsylvania, Stafford, City of Fredericksburg6 hr
Jun 26, 1:17 PM EDTFlash Flood WarningLWXLoudoun3 hr
Jun 26, 2:22 PM EDTFlash Flood WarningLWXNelson6 hr
Jun 26, 5:39 PM EDTSpecial Marine WarningLWX96 min
Jun 26, 6:08 PM EDTFlash Flood WarningLWXPrince William, City of Manassas, City of Manassas Park6 hr
Jun 25, 8:16 PM EDTFlash Flood WarningLWXBaltimore, City of Baltimore4 hr
Jun 25, 10:13 PM EDTFlash Flood WarningLWXHarford3 hr
Jun 25, 10:14 PM EDTFlash Flood WarningLWXPrince George's3 hr
Jun 25, 10:51 PM EDTFlash Flood WarningLWXMontgomery4 hr
Jun 25, 11:04 PM EDTFlash Flood WarningLWXHoward4 hr
Jun 26, 1:01 AM EDTFlash Flood WarningLWXHarford119 min
Jun 26, 2:32 AM EDTFlash Flood WarningLWXAllegany4 hr
Jun 26, 4:37 AM EDTFlash Flood WarningLWXWashington3 hr
Jun 26, 11:15 AM EDTFlash Flood WarningLWXAnne Arundel4 hr
Jun 26, 11:31 AM EDTFlash Flood WarningLWXBaltimore, Harford, City of Baltimore6 hr
Jun 26, 1:16 PM EDTFlash Flood WarningLWXHoward6 hr
Jun 26, 3:34 PM EDTFlash Flood WarningLWXCarroll6 hr
Jun 26, 7:09 PM EDTFlash Flood WarningLWXHoward6 hr

Nearby

Flash Flood Warnings in Virginia, 2006Flash Flood Warnings in Maryland, 2006Every flash flood warning in 2006

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.