Alert archive / Ohio / Flash Flood Watches in 2018

Flash Flood Watch 4, NWS Pittsburgh, PA

June 9, 20184 counties in Pennsylvania; 5 counties in Ohio; Brooke County, Hancock County, Ohio County, West Virginia

NWS Pittsburgh, PA issued this flash flood watch at Jun 9, 2018, 2:36 PM EDT for 4 counties in Pennsylvania; 5 counties in Ohio; Brooke County, Hancock County, Ohio County, West Virginia. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Jun 9, 2018, 2:36 PM EDT (18:36 UTC)
Expired: Jun 9, 2018, 11:24 PM EDT
In force: 9 hr
Issued by: NWS Pittsburgh, PA
Flood severity: None

Counties Carroll County, OH, Coshocton County, OH, Harrison County, OH, Jefferson County, OH, Tuscarawas County, OH, Allegheny County, PA, Fayette County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Ohio County, WV

The radar

The Pittsburgh radar (KPBZ), 42 km from the middle of the area, began a volume at 18:39 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.6 hours before the alert went out and 289 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: 63 J/kg
Mixed-layer CIN: -214 J/kg
Mixed-layer LCL: 1357 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 109 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 9, 2:12 PM EDT, 24 minutes earlier.

Area forecast discussion, Jun 9, 2:12 PM EDT, 24 minutes before

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Hazardous weather outlook, Jun 9, 3:15 AM EDT, 11 hours 21 minutes before

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In the hours before

Local storm report, Jun 9, 9:16 AM EDT, 5 hours 20 minutes before

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Local storm report, Jun 9, 9:46 AM EDT, 4 hours 50 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 8, 8:24 PM EDT	Flash Flood Warning	PBZ	Westmoreland	90 min
Jun 8, 8:37 PM EDT	Special Weather Statement	PBZ	Westmoreland	38 min
Jun 8, 8:17 PM EDT	Flash Flood Warning Emergency	PBZ	Tuscarawas	3 hr
Jun 8, 8:33 PM EDT	Special Weather Statement	PBZ	Belmont	42 min
Jun 8, 9:43 PM EDT	Areal Flood Warning	PBZ	Jefferson	2 hr
Jun 8, 11:02 PM EDT	Areal Flood Warning	PBZ	Carroll, Tuscarawas	9 hr
Jun 9, 7:58 PM EDT	Special Weather Statement	PBZ	Coshocton	62 min

Nearby

Flash Flood Watches in Ohio, 2018 Flash Flood Watches in Pennsylvania, 2018 Flash Flood Watches in West Virginia, 2018 Every flash flood watch in 2018

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.