Alert archive / New Jersey / Areal Flood Advisories in 2009

Areal Flood Advisory 37, NWS Philadelphia/Mount Holly

July 26, 20094 counties in New Jersey

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 26, 2009, 9:57 PM EDT for 4 counties in New Jersey. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Jul 26, 2009, 9:57 PM EDT (01:57 UTC)
Expired: Jul 27, 2009, 12:11 AM EDT
In force: 2 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 01:59 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

Brookhaven, NY (KOKX), launched 00:00Z, 2.0 hours before the alert went out and 148 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: 807 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.8

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Jul 26, 9:50 PM EDT, 7 minutes earlier.

Area forecast discussion, Jul 26, 9:50 PM EDT, 7 minutes before

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Hazardous weather outlook, Jul 26, 9:10 PM EDT, 47 minutes before

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In the hours before

Special weather statement, Jul 26, 8:13 PM EDT, 1 hour 44 minutes before

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Special weather statement, Jul 26, 8:53 PM EDT, 1 hour 4 minutes before

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        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, Jul 26, 8:55 PM EDT, 1 hour 2 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <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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Special weather statement, Jul 26, 9:01 PM EDT, 56 minutes before

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      </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.
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Local storm report, Jul 26, 9:28 PM EDT, 29 minutes before

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<body>
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      <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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Special weather statement, Jul 26, 9:36 PM EDT, 21 minutes before

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<body>
  <main class="wrap">
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      <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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  </main>
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</body>
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The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 26, 8:16 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex	59 min
Jul 27, 2:46 PM EDT	Special Marine Warning	PHI		89 min
Jul 27, 2:58 PM EDT	Special Marine Warning	PHI		92 min
Jul 27, 4:10 PM EDT	Special Marine Warning	PHI		2 hr
Jul 27, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	54 min
Jul 27, 6:25 PM EDT	Special Marine Warning	PHI		95 min
Jul 26, 8:26 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Northampton	37 min
Jul 27, 3:01 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	59 min

Nearby

Areal Flood Advisories in New Jersey, 2009 Every areal flood 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.