Alert archive / Pennsylvania / Flash Flood Watches in 2013

Flash Flood Watch 5, NWS State College, PA

July 22, 20134 counties in Pennsylvania

NWS State College, PA issued this flash flood watch at Jul 22, 2013, 11:11 AM EDT for 4 counties in Pennsylvania. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Jul 22, 2013, 11:11 AM EDT (15:11 UTC)
Expired: Jul 22, 2013, 10:52 PM EDT
In force: 12 hr
Issued by: NWS State College, PA
Flood severity: None

Counties Bedford County, PA, Cambria County, PA, Clearfield County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 84 km from the middle of the area, began a volume at 15:12 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 241 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: 1545 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 586 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.0

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 Jul 22, 8:00 AM EDT, 3 hours 11 minutes earlier.

Area forecast discussion, Jul 22, 8:00 AM EDT, 3 hours 11 minutes before

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Hazardous weather outlook, Jul 22, 5:12 AM EDT, 5 hours 59 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
Jul 21, 8:24 PM EDT	Special Weather Statement	CTP	Centre	51 min
Jul 21, 8:39 PM EDT	Areal Flood Advisory	CTP	Centre	81 min
Jul 21, 9:52 PM EDT	Areal Flood Advisory	CTP	Centre, Mifflin	83 min
Jul 22, 4:36 PM EDT	Areal Flood Advisory	CTP	Lycoming	54 min
Jul 22, 5:11 PM EDT	Areal Flood Advisory	CTP	Dauphin, Lebanon	94 min
Jul 22, 5:23 PM EDT	Flash Flood Warning	CTP	Lebanon	7 hr
Jul 22, 5:56 PM EDT	Areal Flood Advisory	CTP	Bedford, Somerset	109 min
Jul 22, 6:26 PM EDT	Areal Flood Advisory	CTP	Dauphin, Lancaster, Lebanon	79 min
Jul 22, 7:43 PM EDT	Areal Flood Advisory	CTP	Dauphin, Lancaster, Lebanon	62 min

Nearby

Flash Flood Watches in Pennsylvania, 2013 Every flash flood watch in 2013

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.