Alert archive / Pennsylvania / Flash Flood Watches in 2010

Flash Flood Watch 4, NWS State College, PA

June 24, 20106 counties in Pennsylvania

NWS State College, PA issued this flash flood watch at Jun 24, 2010, 1:07 AM EDT for 6 counties in Pennsylvania. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Jun 24, 2010, 1:07 AM EDT (05:07 UTC)
Expired: Jun 24, 2010, 10:00 AM EDT
In force: 9 hr
Issued by: NWS State College, PA
Flood severity: None

Counties Cameron County, PA, Elk County, PA, McKean County, PA, Potter County, PA, Tioga County, PA, Warren County, PA

The radar

The State College radar (KCCX), 87 km from the middle of the area, began a volume at 05:07 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 5.1 hours before the alert went out and 144 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: 686 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1012 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 302 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 6.9

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 23, 10:28 PM EDT, 2 hours 39 minutes earlier.

Area forecast discussion, Jun 23, 10:28 PM EDT, 2 hours 39 minutes before

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Hazardous weather outlook, Jun 23, 9:06 PM EDT, 4 hours 1 minute before

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In the hours before

Local storm report, Jun 23, 10:02 PM EDT, 3 hours 5 minutes before

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Special weather statement, Jun 23, 10:24 PM EDT, 2 hours 43 minutes before

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Special weather statement, Jun 23, 11:04 PM EDT, 2 hours 3 minutes before

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Special weather statement, Jun 23, 11:23 PM EDT, 1 hour 44 minutes before

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Special weather statement, Jun 24, 12:28 AM EDT, 39 minutes before

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Special weather statement, Jun 24, 1:03 AM EDT, 4 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 23, 9:42 PM EDT	Special Weather Statement	CTP	Warren	63 min
Jun 23, 10:24 PM EDT	Special Weather Statement	CTP	McKean	51 min
Jun 23, 11:04 PM EDT	Special Weather Statement	CTP	Forest	41 min
Jun 23, 11:23 PM EDT	Special Weather Statement	CTP	Warren	52 min
Jun 23, 11:53 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	52 min
Jun 24, 12:28 AM EDT	Special Weather Statement	CTP	Cameron, Elk, McKean	62 min
Jun 24, 12:50 AM EDT	Areal Flood Advisory	CTP	McKean, Warren	4 hr
Jun 24, 1:03 AM EDT	Special Weather Statement	CTP	McKean	42 min
Jun 24, 1:27 AM EDT	Special Weather Statement	CTP	Cameron, Potter, Tioga	78 min
Jun 24, 1:46 AM EDT	Special Weather Statement	CTP	Potter	59 min
Jun 24, 2:04 AM EDT	Special Weather Statement	CTP	Warren	56 min
Jun 24, 2:27 AM EDT	Special Weather Statement	CTP	Tioga	33 min
Jun 24, 2:38 AM EDT	Special Weather Statement	CTP	Potter, Tioga	22 min
Jun 24, 3:04 AM EDT	Special Weather Statement	CTP	Sullivan, Tioga	41 min
Jun 24, 4:07 AM EDT	Special Weather Statement	CTP	Sullivan	23 min
Jun 24, 9:11 AM EDT	Special Weather Statement	CTP	Cameron, Elk, McKean	34 min
Jun 24, 9:45 AM EDT	Special Weather Statement	CTP	Cameron, Clinton, Potter, Tioga	45 min
Jun 24, 10:10 AM EDT	Special Weather Statement	CTP	Clearfield	50 min
Jun 24, 10:59 AM EDT	Special Weather Statement	CTP	Tioga	46 min
Jun 24, 12:01 PM EDT	Special Weather Statement	CTP	Somerset	29 min
Jun 24, 12:20 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	42 min
Jun 24, 12:36 PM EDT	Special Weather Statement	CTP	Bedford, Somerset	24 min
Jun 24, 1:07 PM EDT	Special Weather Statement	CTP	Cumberland, Dauphin, Lebanon, Perry, Schuylkill	53 min
Jun 24, 1:09 PM EDT	Special Weather Statement	CTP	Bedford	51 min
Jun 24, 1:21 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cumberland, Franklin, Fulton, Huntingdon, Perry	39 min
Jun 24, 1:29 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Franklin, Lancaster, Lebanon, Perry and 1 more	61 min
Jun 24, 1:55 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, York	50 min
Jun 24, 2:02 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon, York	58 min
Jun 24, 2:43 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	62 min

Nearby

Flash Flood Watches in Pennsylvania, 2010 Every flash flood watch in 2010

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.