Alert archive / Ohio / Flash Flood Watches in 2018

Flash Flood Watch 2, NWS Pittsburgh, PA

April 14, 20186 counties in Pennsylvania; 11 counties in Ohio; 9 counties in West Virginia

NWS Pittsburgh, PA issued this flash flood watch at Apr 14, 2018, 2:41 PM EDT for 6 counties in Pennsylvania; 11 counties in Ohio; 9 counties in West Virginia. It took effect at Apr 15, 2018, 4:00 PM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Apr 14, 2018, 2:41 PM EDT (18:41 UTC)
In effect from: Apr 15, 2018, 4:00 PM EDT
Expired: Apr 16, 2018, 3:22 AM EDT
In force: 11 hr
Issued by: NWS Pittsburgh, PA
Flood severity: None

All 26 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, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Preston County, WV, Tucker County, WV, Wetzel County, WV

The radar

The Pittsburgh radar (KPBZ), 63 km from the middle of the area, began a volume at 18:43 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 12:00Z, 6.7 hours before the alert went out and 59 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: 2199 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 151 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 Apr 13, 7:51 PM EDT, 18 hours 50 minutes earlier.

Area forecast discussion, Apr 13, 7:51 PM EDT, 18 hours 50 minutes before

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Nearby

Flash Flood Watches in Ohio, 2018 Flash Flood Watches in West Virginia, 2018 Flash Flood Watches in Pennsylvania, 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.