Severe Thunderstorm Warning 62, NWS Pittsburgh, PA

Area Forecast Discussion
National Weather Service Pittsburgh PA
324 PM EDT Fri May 19 2017

.SYNOPSIS...
Shower and thunderstorm chances will continue ahead of a stalled
boundary into tonight. Rain chances will increase by the end of
the weekend ahead of an approaching frontal system.

&&

.NEAR TERM /THROUGH SATURDAY/...
The front has not moved much at all today and continues to more
or less bisect the forecast area, thanks to zonal flow in the
midlevels providing very little push. Scattered shower and
thunderstorm activity has blossomed to the south of the boundary
where 1000-2000 J/kg of CAPE has built up. Activity will
continue here into the evening hours in a mainly disorganized
manner, but will focus near the front. Severe thunderstorm watch
just went up in the southwestern CWA, where a few large hail and
damaging wind events are possible. Expect coverage to fade
overnight with the loss of instability. Temperatures will be a
little cooler than previous nights, but still above normal.

500 mb heights start to rise again Saturday over our area in
response to a trough moving into the Mississippi Valley. This
will start to push the boundary north again as a warm front. The
increase in moisture will allow for scattered showers and storms
across mainly the southwest half of the CWA during the
afternoon. Severe risk again looks marginal in weak flow. Temperatures
will be near normal across the north, and a few degrees above
normal in the south.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/...
This period will feature a healthy amount of rainfall,
particularly during Sunday afternoon and evening, where
categorical PoPs are appropriate. A shortwave over the upper
Midwest will rotate a surface low across the Great Lakes,
driving a frontal boundary towards and across our region.
Southwest flow will push a very moist air mass over us ahead of
the front, with precipitable water values rising to between 1.5
and 1.75 inches. This would be near the top of climatology.
Given the relatively slow movement of the front, several rounds
of showers and storms are possible, which could leave to heavy
rainfall, perhaps even excessive in a few spots. Not enough
confidence for an HWO heavy rain mention yet, but will continue
to monitor. Above-normal temperatures will continue.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
Behind the front, near to below normal temperatures will take
hold in a general troughing pattern. A couple of systems will
provide shower and thunderstorm chances through the period, with
chances decreasing toward the end of the period.

&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
Mainly VFR conditions expected today out side of MVFR associated
with any thunderstorm development south of I-70 through the
evening. Winds will veer overnight as a frontal boundary
continues to slowly drop south.

.Outlook...
Restrictions are possible again late Sat thru early Mon with
crossing fronts.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...None.
OH...None.
PA...None.
WV...None.

&&

Hazardous Weather Outlook
National Weather Service Pittsburgh PA
318 PM EDT Fri May 19 2017

MDZ001-OHZ041-PAZ007>009-013>016-020>023-073>076-WVZ511>514-201930-
Garrett-Columbiana-Mercer-Venango-Forest-Lawrence-Butler-Clarion-
Jefferson-Beaver-Allegheny-Armstrong-Indiana-Westmoreland-
Westmoreland Ridges-Fayette-Fayette Ridges-Preston-Eastern Preston-
Western Tucker-Eastern Tucker-
318 PM EDT Fri May 19 2017

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

.DAY ONE...This Afternoon and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

OHZ039-040-048>050-057>059-068-069-PAZ029-031-WVZ001>004-012-021-509-
510-201930-
Tuscarawas-Carroll-Coshocton-Harrison-Jefferson-Muskingum-Guernsey-
Belmont-Noble-Monroe-Washington-Greene-Hancock-Brooke-Ohio-Marshall-
Wetzel-Marion-Monongalia-
Ridges of Eastern Monongalia and Northwestern Preston-
318 PM EDT Fri May 19 2017

...SEVERE THUNDERSTORM WATCH 247 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for east central Ohio, southwest
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.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1105 AM EDT FRI MAY 19 2017

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

0403 PM     TSTM WND DMG     2 E STEUBENVILLE        40.37N  80.62W
05/18/2017                   JEFFERSON          OH   BROADCAST MEDIA

            *** 3 INJ *** TREES DOWN ON HIGHLAND AVENUE AND ONE
            TREE LANDED ON A HOUSE AND INJURED THREE PEOPLE

&&

EVENT NUMBER PBZ1701489

Special Weather Statement
National Weather Service Pittsburgh PA
230 PM EDT FRI MAY 19 2017

OHZ069-WVZ004-012-191900-
Monroe-Marshall-Wetzel-
230 PM EDT FRI MAY 19 2017

...A STRONG THUNDERSTORM CAPABLE OF PRODUCING HAIL AND GUSTY WIND
WILL AFFECT SOUTHERN MONROE...NORTHWESTERN WETZEL AND SOUTHWESTERN
MARSHALL COUNTIES...

At 229 PM EDT, a strong thunderstorm was located 9 miles northwest of
Sistersville, or 10 miles south of Woodsfield, moving east at 25 mph.

Wind gusts up to 45 mph and hail up to the size of nickels are
possible with this storm.

Locations impacted include...
New Martinsville...               Sardis...
Fly...                            Antioch...
Graysville...                     Proctor...
Hannibal...                       Rinard Mills...
Laings...

This storm may intensify, so monitor local radio or television
stations for additional information and possible warnings from the
National Weather Service.

LAT...LON 3957 8104 3957 8105 3958 8125 3970 8125
      3974 8081 3956 8081 3955 8082 3958 8083
      3959 8085 3960 8085 3958 8089 3961 8094
      3954 8104
TIME...MOT...LOC 1829Z 269DEG 20KT 3961 8116

Fries

Special Weather Statement
National Weather Service Pittsburgh PA
302 PM EDT FRI MAY 19 2017

OHZ069-WVZ004-012-191930-
Monroe-Marshall-Wetzel-
302 PM EDT FRI MAY 19 2017

...A STRONG THUNDERSTORM CAPABLE OF PRODUCING HAIL AND GUSTY WIND
WILL AFFECT SOUTHEASTERN MONROE...NORTHWESTERN WETZEL AND
SOUTHWESTERN MARSHALL COUNTIES...

At 301 PM EDT, a strong thunderstorm was located near Paden City, or
7 miles west of New Martinsville, moving east at 20 mph.

Wind gusts up to 55 mph and hail up to the size of nickels are
possible with this storm.

Locations impacted include...
New Martinsville...               Pine Grove...
Sardis...                         Clarington...
Fly...                            Antioch...
Wileyville...                     Proctor...
Reader...                         Lynn Camp...
Porters Falls...                  Hannibal...

This storm may intensify, so monitor local radio or television
stations for additional information and possible warnings from the
National Weather Service.

LAT...LON 3955 8079 3956 8081 3956 8082 3958 8083
      3958 8085 3960 8085 3958 8089 3961 8094
      3954 8104 3957 8104 3957 8107 3970 8110
      3980 8070 3954 8063 3953 8078
TIME...MOT...LOC 1901Z 258DEG 19KT 3963 8099

Fries