Alert archive / Pennsylvania / Flood Watches in 2013

Flood Watch 2, NWS Pittsburgh, PA

April 11, 20139 counties in Pennsylvania; 6 counties in Ohio; Hancock County, West Virginia

NWS Pittsburgh, PA issued this flood watch at Apr 11, 2013, 3:53 AM EDT for 9 counties in Pennsylvania; 6 counties in Ohio; Hancock County, West Virginia. It took effect at Apr 11, 2013, 2:00 PM EDT. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued: Apr 11, 2013, 3:53 AM EDT (07:53 UTC)
In effect from: Apr 11, 2013, 2:00 PM EDT
Expired: Apr 12, 2013, 4:01 AM EDT
In force: 14 hr
Issued by: NWS Pittsburgh, PA
Flood severity: None

Counties Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Harrison County, OH, Jefferson County, OH, Tuscarawas County, OH, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Forest County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Hancock County, WV

The radar

The Pittsburgh radar (KPBZ), 34 km from the middle of the area, began a volume at 07:53 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 (KPIT), launched 00:00Z, 7.9 hours before the alert went out and 51 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: 173 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1067 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

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 Pittsburgh, PA wrote its last area forecast discussion before this flood watch went out at Apr 10, 6:33 PM EDT, 9 hours 20 minutes earlier.

Area forecast discussion, Apr 10, 6:33 PM EDT, 9 hours 20 minutes before

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Hazardous weather outlook, Apr 10, 6:22 PM EDT, 9 hours 31 minutes before

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The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 8:51 PM EDT	Special Weather Statement	PBZ	Allegheny, Beaver, Washington	54 min
Apr 10, 9:24 PM EDT	Special Weather Statement	PBZ	Allegheny, Armstrong, Fayette, Greene, Indiana, Washington and 1 more	36 min
Apr 10, 9:40 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Fayette, Greene, Indiana, Washington and 1 more	50 min
Apr 11, 11:46 AM EDT	River Flood Advisory	PBZ	Allegheny	16 hr
Apr 10, 8:17 PM EDT	Special Weather Statement	PBZ	Belmont, Carroll, Harrison, Jefferson, Tuscarawas	58 min
Apr 11, 11:20 AM EDT	Areal Flood Warning	PBZ	Carroll, Columbiana, Coshocton, Tuscarawas	24 hr

Nearby

Flood Watches in Pennsylvania, 2013 Flood Watches in Ohio, 2013 Flood Watches in West Virginia, 2013 Every 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.