Alert archive / Pennsylvania / Areal Flood Advisories in 2009

Areal Flood Advisory 66, NWS Philadelphia/Mount Holly

August 19, 2009Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Aug 19, 2009, 4:30 PM EDT for Monroe County, Pennsylvania. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Aug 19, 2009, 4:30 PM EDT (20:30 UTC)
Expired: Aug 19, 2009, 6:30 PM EDT
In force: 2 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Monroe County, PA

The radar

The Binghamton radar (KBGM), 138 km from the middle of the area, began a volume at 20:31 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.5 hours before the alert went out and 188 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: 277 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 Aug 19, 3:30 PM EDT, 1 hour earlier.

Area forecast discussion, Aug 19, 3:30 PM EDT, 1 hour before

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Hazardous weather outlook, Aug 19, 4:00 PM EDT, 30 minutes before

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In the hours before

Special weather statement, Aug 19, 12:43 PM EDT, 3 hours 47 minutes before

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Special weather statement, Aug 19, 1:26 PM EDT, 3 hours 4 minutes before

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Special weather statement, Aug 19, 1:51 PM EDT, 2 hours 39 minutes before

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Special weather statement, Aug 19, 2:38 PM EDT, 1 hour 52 minutes before

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Special weather statement, Aug 19, 2:55 PM EDT, 1 hour 35 minutes before

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      <p id="message2">
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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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Special weather statement, Aug 19, 4:10 PM EDT, 20 minutes before

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      <p id="message1">
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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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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 8:21 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	69 min
Aug 18, 8:35 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	70 min
Aug 18, 8:59 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Somerset	60 min
Aug 18, 9:03 PM EDT	Special Marine Warning	PHI		87 min
Aug 18, 10:55 PM EDT	Special Marine Warning	PHI		95 min
Aug 19, 3:49 AM EDT	Special Marine Warning	PHI		86 min
Aug 19, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	55 min
Aug 19, 5:04 PM EDT	Flash Flood Warning	PHI	Monroe	115 min
Aug 19, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	37 min
Aug 19, 5:51 PM EDT	Areal Flood Advisory	PHI	Carbon	114 min

Nearby

Areal Flood Advisories in Pennsylvania, 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.