Alert archive / Pennsylvania / Flood Watches in 2011

Flood Watch 6, NWS State College, PA

May 17, 201112 counties in Pennsylvania

NWS State College, PA issued this flood watch at May 17, 2011, 11:13 AM EDT for 12 counties in Pennsylvania. It took effect at May 17, 2011, 6:00 PM EDT. It was in force for 26 hr.

The area

The counties it named.

The facts

Issued: May 17, 2011, 11:13 AM EDT (15:13 UTC)
In effect from: May 17, 2011, 6:00 PM EDT
Expired: May 18, 2011, 8:29 PM EDT
In force: 26 hr
Issued by: NWS State College, PA
Flood severity: None

Counties Adams County, PA, Bedford County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Lancaster County, PA, Lebanon County, PA, Perry County, PA, Schuylkill County, PA, Somerset County, PA, York County, PA

The radar

The State College radar (KCCX), 105 km from the middle of the area, began a volume at 15:13 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, 3.2 hours before the alert went out and 126 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: 65 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 490 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 118 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 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 flood watch went out at May 17, 8:52 AM EDT, 2 hours 21 minutes earlier.

Area forecast discussion, May 17, 8:52 AM EDT, 2 hours 21 minutes before

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Hazardous weather outlook, May 17, 4:32 AM EDT, 6 hours 41 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
May 16, 9:00 PM EDT	Special Weather Statement	CTP	York	60 min
May 17, 5:32 PM EDT	Special Weather Statement	CTP	Bedford, Franklin, Fulton	43 min
May 17, 5:45 PM EDT	Areal Flood Advisory	CTP	Bedford, Franklin, Fulton, Somerset	3 hr
May 17, 6:14 PM EDT	Special Weather Statement	CTP	Franklin, Fulton	46 min
May 17, 6:50 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Fulton, Huntingdon	40 min
May 17, 7:23 PM EDT	Special Weather Statement	CTP	Blair	37 min
May 17, 7:47 PM EDT	Areal Flood Advisory	CTP	Blair, Huntingdon	88 min

Nearby

Flood Watches in Pennsylvania, 2011 Every flood watch in 2011

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.