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Hazardous Weather Outlook

Hazardous Weather Outlook...UPDATED
National Weather Service Pittsburgh PA
519 PM EDT Mon Jun 1 2020

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029-031-073>076-WVZ001>004-012-021-509>514-022130-
Garrett-Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-
Jefferson OH-Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-
Forest-Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny-
Armstrong-Indiana-Washington-Greene-Westmoreland-Westmoreland Ridges-
Fayette-Fayette Ridges-Hancock-Brooke-Ohio-Marshall-Wetzel-Marion-
Monongalia-Ridges of Eastern Monongalia and Northwestern Preston-
Preston-Eastern Preston-Western Tucker-Eastern Tucker-
519 PM EDT Mon Jun 1 2020

This Hazardous Weather Outlook is for western Maryland, east
central Ohio, northwest Pennsylvania, southwest Pennsylvania,
western Pennsylvania, northern West Virginia and the northern
panhandle of West Virginia.

.DAY ONE...Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Isolated severe thunderstorms are possible Tuesday afternoon and
evening, mainly north of Interstate 70. Damaging wind and large hail
are the primary hazards.

Surface low pressure coincident with a strengthening jet stream on
Wednesday will prompt a cold frontal passage over the region after
significant warm and moist advection has occurred. This
precipitation chance working with an unstable boundary layer will
contribute to a sizable severe threat, especially Wednesday Evening.

Warm frontal passage in the morning on Wednesday will likely cause
rain showers early, before clearing and sunshine can then
destabilize the boundary layer.

Forecast soundings suggest a QLCS (linear, squall line type storm
similar to April 7-8 2020) Wednesday Evening with CAPE as large as
3,000 j/kg and 1000-500mb bulk shear upward of 50 kts. Likely hazards
include large hail, damaging wind that could take down power lines,
trees. An isolated tornado cannot be ruled out and ample moisture
will contribute to the threat for flooding.

As of Monday Morning the Storm Prediction Center has the region in a
Slight Risk, meaning scattered severe storms are possible.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

$$




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