Alert archive / Pennsylvania / Flood Watches in 2018

Flood Watch 4, NWS Pittsburgh, PA

February 22, 201814 counties in Pennsylvania; 11 counties in Ohio; 9 counties in West Virginia

NWS Pittsburgh, PA issued this flood watch at Feb 22, 2018, 3:15 AM EST for 14 counties in Pennsylvania; 11 counties in Ohio; 9 counties in West Virginia. It was in force for 3 days.

The area

The counties it named.

The facts

Issued
Feb 22, 2018, 3:15 AM EST (08:15 UTC)
Expired
Feb 25, 2018, 9:32 AM EST
In force
3 days
Issued by
NWS Pittsburgh, PA
Flood severity
None
All 34 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, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango 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), 28 km from the middle of the area, began a volume at 08:14 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 00:00Z, 8.3 hours before the alert went out and 306 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 2018-02-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2018-02-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
3 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
499 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
300 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 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 Feb 22, 12:21 AM EST, 2 hours 54 minutes earlier.

Area forecast discussion, Feb 22, 12:21 AM EST, 2 hours 54 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Feb 22, 7:29 AM ESTAreal Flood WarningPBZAllegheny, Armstrong, Beaver, Fayette, Greene, Indiana and 2 more9 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZAllegheny71 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZAllegheny47 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZBeaver47 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZBeaver47 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZFayette, Washington, Westmoreland71 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZAllegheny, Washington, Westmoreland71 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZIndiana, Westmoreland48 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZFayette47 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZAllegheny, Westmoreland47 hr
Feb 22, 6:19 AM ESTRiver Flood WatchPBZBelmont, Jefferson3 days
Feb 22, 6:19 AM ESTRiver Flood WatchPBZBelmont3 days
Feb 22, 6:19 AM ESTRiver Flood WatchPBZBelmont, Monroe3 days
Feb 22, 6:19 AM ESTRiver Flood WatchPBZTuscarawas3 days
Feb 22, 11:50 AM ESTRiver Flood WatchPBZColumbiana71 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZJefferson71 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZJefferson47 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZJefferson71 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZMonroe71 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZGuernsey71 hr
Feb 22, 11:50 AM ESTRiver Flood WatchPBZTuscarawas48 hr
Feb 22, 6:19 AM ESTRiver Flood WatchPBZMarshall3 days

Nearby

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