Alert archive / Ohio / Flash Flood Watches in 2009

Flash Flood Watch 2, NWS Pittsburgh, PA

June 19, 20095 counties in Pennsylvania; 11 counties in Ohio; 6 counties in West Virginia

NWS Pittsburgh, PA issued this flash flood watch at Jun 19, 2009, 11:53 AM EDT for 5 counties in Pennsylvania; 11 counties in Ohio; 6 counties in West Virginia. It took effect at Jun 19, 2009, 6:00 PM EDT. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued: Jun 19, 2009, 11:53 AM EDT (15:53 UTC)
In effect from: Jun 19, 2009, 6:00 PM EDT
Expired: Jun 20, 2009, 11:11 AM EDT
In force: 17 hr
Issued by: NWS Pittsburgh, PA
Flood severity: None

All 22 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, Allegheny County, PA, Beaver County, PA, Greene County, PA, Lawrence County, PA, Washington County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Ohio County, WV, Wetzel County, WV

The radar

The Pittsburgh radar (KPBZ), 65 km from the middle of the area, began a volume at 15:52 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 12:00Z, 3.9 hours before the alert went out and 67 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 883 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 158 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 Jun 19, 11:24 AM EDT, 29 minutes earlier.

Area forecast discussion, Jun 19, 11:24 AM EDT, 29 minutes before

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Hazardous weather outlook, Jun 19, 9:45 AM EDT, 2 hours 8 minutes before

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In the hours before

Special weather statement, Jun 19, 7:17 AM EDT, 4 hours 36 minutes before

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Special weather statement, Jun 19, 7:58 AM EDT, 3 hours 55 minutes before

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Special weather statement, Jun 19, 8:40 AM EDT, 3 hours 13 minutes before

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Special weather statement, Jun 19, 9:19 AM EDT, 2 hours 34 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
Jun 19, 6:23 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Tuscarawas	67 min
Jun 19, 6:51 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll	43 min
Jun 19, 6:58 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Muskingum	62 min
Jun 19, 7:03 PM EDT	Severe Thunderstorm Warning	PBZ	Guernsey, Harrison, Tuscarawas	38 min

Nearby

Flash Flood Watches in Ohio, 2009 Flash Flood Watches in West Virginia, 2009 Flash Flood Watches in Pennsylvania, 2009 Every flash flood watch in 2009

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.