Alert archive / West Virginia / Wind Advisories in 2009

Wind Advisory 5, NWS Baltimore/Washington

March 29, 2009Allegany County, Maryland; Grant County, Mineral County, West Virginia

NWS Baltimore/Washington issued this wind advisory at Mar 29, 2009, 2:31 PM EDT for Allegany County, Maryland; Grant County, Mineral County, West Virginia. It took effect at Mar 29, 2009, 11:00 PM EDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Mar 29, 2009, 2:31 PM EDT (18:31 UTC)
In effect from: Mar 29, 2009, 11:00 PM EDT
Expired: Mar 30, 2009, 11:00 AM EDT
In force: 12 hr
Issued by: NWS Baltimore/Washington

Counties Allegany County, MD, Grant County, WV, Mineral County, WV

The radar

The Sterling radar (KLWX), 134 km from the middle of the area, began a volume at 18:34 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, 6.5 hours before the alert went out and 142 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 491 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 246 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind advisory 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 wind advisory went out at Mar 29, 10:50 AM EDT, 3 hours 41 minutes earlier.

Area forecast discussion, Mar 29, 10:50 AM EDT, 3 hours 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>

Hazardous weather outlook, Mar 29, 11:47 AM EDT, 2 hours 44 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>

In the hours before

Special weather statement, Mar 29, 2:14 PM EDT, 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
214 PM EDT SUN MAR 29 2009

MDZ003-004-WVZ053-291900-
WASHINGTON MD-FREDERICK MD-JEFFERSON WV-
214 PM EDT SUN MAR 29 2009

...STRONG THUNDERSTORMS TO AFFECT WASHINGTON...FREDERICK AND
JEFFERSON COUNTIES...

AT 214 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
SHARPSBURG...MOVING NORTHEAST AT 35 MPH.

LOCATIONS THAT WILL LIKELY BE AFFECTED BY THIS STORM INCLUDE
BOONSBORO...HAGERSTOWN...WOLFSVILLE...THURMONT AND EMMITSBURG.

WIND GUSTS OF 40 TO 50 MPH AND SMALL HAIL CAN BE EXPECTED WITH THIS
STORM.

RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE WARNINGS ARE
ISSUED.

SMZ

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 29, 2:30 PM EDT	Gale Warning	LWX		21 hr
Mar 29, 4:26 PM EDT	Special Marine Warning	LWX		2 hr
Mar 29, 5:09 PM EDT	Special Marine Warning	LWX		96 min
Mar 29, 5:20 PM EDT	Special Marine Warning	LWX		115 min
Mar 29, 4:20 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	22 min
Mar 29, 5:31 PM EDT	Severe Thunderstorm Warning	LWX	Harford	29 min
Mar 29, 5:45 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Harford	25 min

Nearby

Wind Advisories in West Virginia, 2009 Wind Advisories in Maryland, 2009 Wind Advisories in Virginia, 2009 Every wind advisory 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.