Alert archive / Ohio / Flash Flood Watches in 2017

Flash Flood Watch 9, NWS Pittsburgh, PA

November 5, 20175 counties in Pennsylvania; 11 counties in Ohio; Brooke County, Hancock County, Ohio County, West Virginia

NWS Pittsburgh, PA issued this flash flood watch at Nov 5, 2017, 3:05 AM EST for 5 counties in Pennsylvania; 11 counties in Ohio; Brooke County, Hancock County, Ohio County, West Virginia. It took effect at Nov 5, 2017, 4:00 PM EST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Nov 5, 2017, 3:05 AM EST (08:05 UTC)
In effect from: Nov 5, 2017, 4:00 PM EST
Expired: Nov 6, 2017, 3:49 AM EST
In force: 12 hr
Issued by: NWS Pittsburgh, PA
Flood severity: None

Counties Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Muskingum County, OH, Noble County, OH, Tuscarawas County, OH, Beaver County, PA, Forest County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Brooke County, WV, Hancock County, WV, Ohio County, WV

The radar

The Pittsburgh radar (KPBZ), 52 km from the middle of the area, began a volume at 08:07 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

Pittsburgh, PA (KAGC), launched 00:00Z, 8.1 hours before the alert went out and 62 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: 1 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 1085 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Pittsburgh, PA wrote its last area forecast discussion before this flash flood watch went out at Nov 5, 1:28 AM EST, 1 hour 37 minutes earlier.

Area forecast discussion, Nov 5, 1:28 AM EST, 1 hour 37 minutes before

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Hazardous weather outlook, Nov 4, 4:11 AM EDT, 23 hours 54 minutes before

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In the hours before

Special weather statement, Nov 5, 1:06 AM EST, 1 hour 59 minutes before

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Special weather statement, Nov 5, 1:59 AM EST, 1 hour 6 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
Nov 5, 3:32 AM EST	Special Weather Statement	PBZ	Beaver	28 min
Nov 5, 6:46 PM EST	Severe Thunderstorm Warning	PBZ	Mercer	44 min
Nov 5, 6:55 PM EST	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Lawrence, Washington	65 min
Nov 5, 1:06 AM EST	Special Weather Statement	PBZ	Tuscarawas	24 min
Nov 5, 1:59 AM EST	Special Weather Statement	PBZ	Columbiana	31 min
Nov 5, 6:05 PM EST	Severe Thunderstorm Warning	PBZ	Carroll, Columbiana, Tuscarawas	55 min

Nearby

Flash Flood Watches in Ohio, 2017 Flash Flood Watches in Pennsylvania, 2017 Flash Flood Watches in West Virginia, 2017 Every flash flood watch in 2017

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.