Alert archive / Pennsylvania / Flash Flood Watches in 2014

Flash Flood Watch 7, NWS State College, PA

June 12, 201419 counties in Pennsylvania

NWS State College, PA issued this flash flood watch at Jun 12, 2014, 4:18 AM EDT for 19 counties in Pennsylvania. It took effect at Jun 12, 2014, 12:00 PM EDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Jun 12, 2014, 4:18 AM EDT (08:18 UTC)
In effect from: Jun 12, 2014, 12:00 PM EDT
Expired: Jun 13, 2014, 12:00 AM EDT
In force: 12 hr
Issued by: NWS State College, PA
Flood severity: None

Counties Adams County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Centre County, PA, Clearfield 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, Mifflin County, PA, Perry County, PA, Somerset County, PA, York County, PA

The radar

The State College radar (KCCX), 67 km from the middle of the area, began a volume at 08:19 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 00:00Z, 8.3 hours before the alert went out and 159 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: 1187 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 698 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.5

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 12, 2:57 AM EDT, 1 hour 21 minutes earlier.

Area forecast discussion, Jun 12, 2:57 AM EDT, 1 hour 21 minutes before

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Hazardous weather outlook, Jun 11, 9:02 PM EDT, 7 hours 16 minutes before

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In the hours before

Special weather statement, Jun 11, 10:21 PM EDT, 5 hours 57 minutes before

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Special weather statement, Jun 11, 10:31 PM EDT, 5 hours 47 minutes before

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Local storm report, Jun 11, 10:55 PM EDT, 5 hours 23 minutes before

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Local storm report, Jun 11, 10:58 PM EDT, 5 hours 20 minutes before

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Local storm report, Jun 11, 11:00 PM EDT, 5 hours 18 minutes before

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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 11, 8:20 PM EDT	Tornado Warning	CTP	Clearfield, Elk	25 min
Jun 11, 8:26 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Cameron, Centre, Clearfield, Clinton and 2 more	64 min
Jun 11, 8:47 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon, Juniata, Mifflin	37 min
Jun 11, 9:35 PM EDT	Special Weather Statement	CTP	Clinton, Potter, Tioga	25 min
Jun 11, 10:21 PM EDT	Special Weather Statement	CTP	Blair	39 min
Jun 11, 10:31 PM EDT	Special Weather Statement	CTP	Schuylkill	44 min
Jun 11, 10:47 PM EDT	Areal Flood Advisory	CTP	Centre, Huntingdon	118 min
Jun 11, 11:26 PM EDT	Areal Flood Advisory	CTP	Schuylkill	2 hr
Jun 12, 1:29 AM EDT	Areal Flood Advisory	CTP	Bedford, Blair, Cambria, Huntingdon, Somerset	3 hr
Jun 12, 5:08 AM EDT	Areal Flood Advisory	CTP	Bedford, Blair, Cambria, Huntingdon, Somerset	4 hr
Jun 12, 2:24 PM EDT	Special Weather Statement	CTP	Franklin	51 min
Jun 12, 2:36 PM EDT	Areal Flood Advisory	CTP	Franklin, Juniata, Perry	3 hr
Jun 12, 2:55 PM EDT	Flash Flood Warning	CTP	Franklin, Juniata, Perry	3 hr
Jun 12, 4:16 PM EDT	Areal Flood Advisory	CTP	Adams, Franklin	3 hr
Jun 12, 4:25 PM EDT	Flash Flood Warning	CTP	Bedford, Cambria, Somerset	3 hr
Jun 12, 5:40 PM EDT	Areal Flood Warning	CTP	Franklin	9 hr
Jun 12, 6:23 PM EDT	Flash Flood Warning	CTP	Bedford, Somerset	3 hr
Jun 12, 6:38 PM EDT	Special Weather Statement	CTP	Warren	67 min
Jun 12, 6:41 PM EDT	Areal Flood Advisory	CTP	Lancaster	2 hr
Jun 12, 7:25 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	35 min
Jun 12, 7:40 PM EDT	Special Weather Statement	CTP	McKean	50 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.