Severe Thunderstorm Warning 104, NWS Pittsburgh, PA

Area Forecast Discussion
National Weather Service Pittsburgh PA
317 PM EDT Wed May 29 2019

.SYNOPSIS...
Rounds of showers and thunderstorms can be expected through
Thursday, with strong storms and heavy rain possible. Dry weather
returns Friday.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
A broken line of convection is progressing eastward across the CWA
at present south of a nearly stationary boundary.  Hail/wind will
continue to be the primary severe threats due to ample CAPE and
shear, with minimal to no tornado threat as low level flow has not
been able to back sufficiently. Training storms may continue to
present an isolated flash flooding threat over the next few hours,
in an area of anomalously high precipitable water.

Activity should decrease in coverage and intensity this evening,
although at least scattered showers and storms will linger through
the night.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH FRIDAY NIGHT/...
Crossing surface low pressure and a shortwave aloft will bring
another round of showers and thunderstorm on Thursday.  The severe
threat will be lessened by a lack of instability relative to today,
but ample moisture and lift could still provide a round of moderate
to heavy rain in areas that do not need it.

The stubborn southeast U.S. ridge will finally be flattened somewhat
by the aforementioned shortwave.  The arrival of high pressure will
provide a break from the rain through Friday night, along with
cooler temperatures.

&&

.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
The next front will return rain chances over the weekend, with
cooler temperatures by Sunday. The first portion of next week
appears dry, with near or below normal temperatures under upper
troughing. The next chance of rain may arrive Wednesday with the
next low pressure system.

&&

.AVIATION /19Z WEDNESDAY THROUGH MONDAY/...
A line of showers and storms will move east southeast along a weak
frontal boundary through this evening. A more prolonged period of
storms is expected for areas along and south of I-70 as the boundary
becomes stationary and allows for moist, southwesterly flow to
continue to fuel convection into the nighttime hours. Storms that
cross any port will bring restrictions in both vis and cig while
creating gusty and erratic winds.

Widespread MVFR to LIFR conditions expected overnight for areas
mainly along and north of the stationary boundary due to bountiful
moisture being trapped underneath a low level inversion. The exact
positioning of the boundary remains uncertain, as well as the extent
of restrictions for impacted sites. Valley fog remains a possibility
as well.

A more potent shortwave trough and its sfc cold front will spread
showers and thunderstorms across the entire area Thursday, which will
keep restrictions in for most sites.

.Outlook...
Periodic restriction potential will continue through Fri as rounds of
storms and associated disturbances cross the region.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...Flash Flood Watch until 2 AM EDT Thursday for MDZ001.
OH...Flash Flood Watch until 2 AM EDT Thursday for OHZ039>041-048>050-
     058-059.
PA...Flash Flood Watch until 2 AM EDT Thursday for PAZ013>016-020>023-
     029-031-073>076.
WV...Flash Flood Watch until 2 AM EDT Thursday for WVZ001>004-012-021-
     509>512.

&&

Hazardous Weather Outlook
National Weather Service Pittsburgh PA
1259 PM EDT Wed May 29 2019

MDZ001-OHZ039>041-049-050-059-PAZ013>016-020>023-029-031-073>076-
WVZ001>004-012-021-509>512-301700-
Garrett-Tuscarawas-Carroll-Columbiana-Harrison-Jefferson OH-Belmont-
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-
1259 PM EDT Wed May 29 2019

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 7 PM EDT THIS
EVENING...

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

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

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

PAZ007>009-WVZ513-514-301700-
Mercer-Venango-Forest-Western Tucker-Eastern Tucker-
1259 PM EDT Wed May 29 2019

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 7 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for northwest Pennsylvania and
northern West Virginia.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

OHZ048-058-301700-
Coshocton-Guernsey-
1259 PM EDT Wed May 29 2019

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...

This Hazardous Weather Outlook is for east central Ohio.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

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

OHZ057-068-069-301700-
Muskingum-Noble-Monroe-
1259 PM EDT Wed May 29 2019

This Hazardous Weather Outlook is for east central Ohio.

.DAY ONE...This afternoon and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
302 PM EDT WED MAY 29 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0232 PM     TSTM WND DMG     DELMONT                 40.41N  79.57W
05/29/2019                   WESTMORELAND       PA   911 CALL CENTER

            TREES AND WIRES DOWN.

&&

EVENT NUMBER PBZ1902231

07

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