Alert archive / Pennsylvania / Flash Flood Watches in 2015

Flash Flood Watch 4, NWS State College, PA

June 15, 201514 counties in Pennsylvania

NWS State College, PA issued this flash flood watch at Jun 15, 2015, 2:36 PM EDT for 14 counties in Pennsylvania. It took effect at Jun 15, 2015, 10:00 PM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Jun 15, 2015, 2:36 PM EDT (18:36 UTC)
In effect from: Jun 15, 2015, 10:00 PM EDT
Expired: Jun 16, 2015, 8:33 AM EDT
In force: 11 hr
Issued by: NWS State College, PA
Flood severity: None

Counties Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Lycoming County, PA, McKean County, PA, Potter County, PA, Somerset County, PA, Tioga County, PA, Warren County, PA

The radar

The State College radar (KCCX), 28 km from the middle of the area, began a volume at 18:36 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 12:00Z, 6.6 hours before the alert went out and 174 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: 95 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 156 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 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 Jun 15, 8:05 AM EDT, 6 hours 31 minutes earlier.

Area forecast discussion, Jun 15, 8:05 AM EDT, 6 hours 31 minutes before

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Hazardous weather outlook, Jun 15, 6:14 AM EDT, 8 hours 22 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
Jun 14, 9:07 PM EDT	Special Weather Statement	CTP	Cambria	83 min
Jun 14, 10:18 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	72 min
Jun 14, 10:21 PM EDT	Special Weather Statement	CTP	Cambria	24 min
Jun 14, 10:56 PM EDT	Areal Flood Advisory	CTP	Bedford, Cambria, Somerset	4 hr
Jun 14, 11:06 PM EDT	Special Weather Statement	CTP	Cambria	39 min
Jun 14, 11:35 PM EDT	Special Weather Statement	CTP	Somerset	25 min
Jun 14, 11:48 PM EDT	Special Weather Statement	CTP	Bedford	42 min
Jun 15, 12:02 AM EDT	Special Weather Statement	CTP	Somerset	28 min
Jun 15, 12:21 AM EDT	Special Weather Statement	CTP	Bedford, Somerset	24 min
Jun 15, 12:50 AM EDT	Special Weather Statement	CTP	Bedford, Franklin, Fulton	25 min
Jun 15, 1:12 AM EDT	Special Weather Statement	CTP	Franklin	33 min
Jun 15, 1:57 AM EDT	Areal Flood Advisory	CTP	Bedford, Blair, Cambria, Somerset	4 hr
Jun 15, 2:42 AM EDT	Special Weather Statement	CTP	Bedford	33 min
Jun 15, 5:02 PM EDT	Special Weather Statement	CTP	Cameron, Centre, Clearfield, Clinton, Elk	88 min
Jun 15, 6:36 PM EDT	Areal Flood Advisory	CTP	Cambria, Clearfield	4 hr

Nearby

Flash Flood Watches in Pennsylvania, 2015 Every flash flood watch in 2015

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.