Alert archive / Pennsylvania / Flash Flood Watches in 2014

Flash Flood Watch 3, NWS State College, PA

May 15, 201433 counties in Pennsylvania

NWS State College, PA issued this flash flood watch at May 15, 2014, 3:53 AM EDT for 33 counties in Pennsylvania. It took effect at May 15, 2014, 2:00 PM EDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued: May 15, 2014, 3:53 AM EDT (07:53 UTC)
In effect from: May 15, 2014, 2:00 PM EDT
Expired: May 16, 2014, 10:38 AM EDT
In force: 21 hr
Issued by: NWS State College, PA
Flood severity: None

All 33 counties

Adams County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Elk County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Lycoming County, PA, McKean County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Potter County, PA, Schuylkill County, PA, Snyder County, PA, Somerset County, PA, Sullivan County, PA, Tioga County, PA, Union County, PA, Warren County, PA, York County, PA

The radar

The State College radar (KCCX), 43 km from the middle of the area, began a volume at 07:54 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

Pittsburgh, PA (KAGC), launched 00:00Z, 7.9 hours before the alert went out and 219 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: 291 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1598 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS State College, PA wrote its last area forecast discussion before this flash flood watch went out at May 15, 1:55 AM EDT, 1 hour 58 minutes earlier.

Area forecast discussion, May 15, 1:55 AM EDT, 1 hour 58 minutes before

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Hazardous weather outlook, May 14, 10:12 PM EDT, 5 hours 41 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.
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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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The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 15, 4:25 PM EDT	Special Weather Statement	CTP	Fulton	65 min
May 15, 5:24 PM EDT	Special Weather Statement	CTP	Huntingdon	51 min
May 15, 5:35 PM EDT	Special Weather Statement	CTP	Adams, Cumberland, Franklin, Perry	55 min
May 15, 5:49 PM EDT	Special Weather Statement	CTP	Clinton	26 min
May 15, 6:05 PM EDT	Special Weather Statement	CTP	Centre, Mifflin	55 min
May 15, 6:26 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Mifflin	64 min
May 15, 6:29 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Perry	31 min
May 15, 6:52 PM EDT	Special Weather Statement	CTP	Tioga	23 min
May 15, 6:58 PM EDT	Special Weather Statement	CTP	Dauphin	32 min
May 15, 7:05 PM EDT	Areal Flood Advisory	CTP	Clinton, Lycoming, Tioga	115 min
May 15, 7:21 PM EDT	Special Weather Statement	CTP	Lycoming, Tioga	24 min
May 15, 7:32 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	43 min
May 15, 7:50 PM EDT	Special Weather Statement	CTP	Sullivan	40 min

Nearby

Flash Flood Watches in Pennsylvania, 2014 Every flash flood watch in 2014

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.