Severe Thunderstorm Warning 129, NWS Pittsburgh, PA

203 
WWUS51 KPBZ 071957
SVSPBZ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
357 PM EDT WED SEP 7 2016

PAC003-125-072015-
/O.CON.KPBZ.SV.W.0129.000000T0000Z-160907T2015Z/
WASHINGTON PA-ALLEGHENY PA-
357 PM EDT WED SEP 7 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR EAST CENTRAL WASHINGTON AND SOUTHEASTERN ALLEGHENY COUNTIES...

AT 357 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER UPPER ST.
CLAIR...OR OVER BETHEL PARK...MOVING SOUTHEAST AT 20 MPH.

HAZARD...60 MPH WIND GUSTS AND NICKEL SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO TREES AND POWER LINES...RESULTING IN SOME 
         POWER OUTAGES. 

LOCATIONS IMPACTED INCLUDE...
MOUNT LEBANON...BETHEL PARK...MCMURRAY...MCKEESPORT...GASTONVILLE...
WEST MIFFLIN...BALDWIN...UPPER ST. CLAIR...SCOTT TOWNSHIP...
WHITEHALL...SOUTH PARK TOWNSHIP...JEFFERSON HILLS...CASTLE SHANNON...
PLEASANT HILLS...CLAIRTON...BRIDGEVILLE...GLASSPORT...MONONGAHELA...
LIBERTY AND PORT VUE.

THIS INCLUDES  INTERSTATE 79 IN PENNSYLVANIA MILE MARKER 52 AND NEAR
MILE MARKER
  54.
 
PLEASE REPORT SEVERE WEATHER BY CALLING 4 1 2...2 6 2...1 9 8 8...
POSTING TO THE NWS PITTSBURGH FACEBOOK PAGE...OR USING TWITTER
@NWSPITTSBURGH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4029 8015 4038 8011 4032 7982 4014 7992
TIME...MOT...LOC 1957Z 298DEG 19KT 4032 8008 

HAIL...0.88IN
WIND...60MPH
 
$$

24

467 
WWUS51 KPBZ 072005
SVSPBZ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
405 PM EDT WED SEP 7 2016

PAC003-125-072015-
/O.EXP.KPBZ.SV.W.0129.000000T0000Z-160907T2015Z/
WASHINGTON PA-ALLEGHENY PA-
405 PM EDT WED SEP 7 2016

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WASHINGTON AND
SOUTHEASTERN ALLEGHENY COUNTIES WILL EXPIRE AT 415 PM EDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4029 8015 4038 8011 4032 7982 4014 7992
TIME...MOT...LOC 2005Z 298DEG 19KT 4031 8005 

$$

24

Area Forecast Discussion
National Weather Service Pittsburgh PA
336 PM EDT Wed Sep 7 2016

.SYNOPSIS...
Warm and humid weather will continue through Saturday, with
multiple disturbances providing shower and thunderstorm chances.

&&

.NEAR TERM /THROUGH THURSDAY/...
Thunderstorms are scattered across the region as weak shortwaves move
southeast on the periphery of an upper level ridge stretching over
the Ohio Valley. Activity will be on the wane as we move through
the evening with loss of daytime heating. Dew points will be
elevated in the upper 60s to around 70 overnight, keeping min
temperatures about 10 degrees above average.

A weak cold front will approach during the day Thursday bringing
increased shower and thunderstorm chances, especially in the
afternoon. SPC has much of the area in a marginal risk for severe
thunderstorms, and this seems reasonable with available low level
instability and some deep layer shear. Another warm and humid day
with temperatures again well above average.

&&

.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/...
Cold front will sink south Thursday night and stall across
northern West Virginia Friday. Shower chances will diminish north
to south Thursday night with the front. Models differ on shortwave
timing for friday into early Saturday in southwest flow aloft
ahead of an approaching trough. Have kept chance pops across the
south Friday spreading north into early Saturday as a compromise
between models. By Saturday afternoon cold front associated with
upper trough will approach with increasing thunderstorm chances.
No change in the quite warm and muggy conditions through the
period.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
Cold front will cross the region Saturday night with showers ending
and much drier and cooler air moving into the region. High pressure
will dominate through Tuesday. An approaching front will bring
shower chances back into the forecast Wednesday.

&&

.AVIATION /20Z WEDNESDAY THROUGH MONDAY/...
General VFR is forecast with the area under a predeminate upper ridge;
however, exceptions include areas of predawn fog in the humid airmass
as well as shortwave-supported and diurnally enhanced convection.

.OUTLOOK /THURSDAY NIGHT THROUGH MONDAY/...
Periodic restrictions can be expected through Saturday as a frontal
system encroaches on the region.

&&

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

&&

15

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
409 AM EDT WED SEP 7 2016

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029-031-073>076-WVZ001>004-012-021-509>514-080815-
GARRETT-TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON-
MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-FOREST-
LAWRENCE-BUTLER-CLARION-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-
409 AM EDT WED SEP 7 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST
CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST
PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...WESTERN
PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF
WEST VIRGINIA.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.