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Pittsburgh PA spring 2017


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Mesoscale Discussion 0621
   NWS Storm Prediction Center Norman OK
   1059 AM CDT Mon May 01 2017

   Areas affected...eastern Ohio...West Virginia through western
   Pennsylvania

   Concerning...Severe potential...Watch likely 

   Valid 011559Z - 011800Z

   Probability of Watch Issuance...95 percent

   SUMMARY...Thunderstorms are expected to undergo a gradual increase
   in coverage and intensity into the afternoon from eastern portions
   of Ohio through West Virginia into western Pennsylvania. Damaging
   wind and a few tornadoes will be the main threats. A tornado watch
   will likely be needed by 17Z.

   DISCUSSION...As of mid day storms have shown some increase in
   intensity and organization over southeast OH. This activity is
   developing along a cold front that stretches from the Great Lakes
   through eastern OH into eastern KY. The downstream warm sector is
   only weakly capped but marginally unstable. However trends in
   visible imagery show numerous cloud breaks, and the boundary layer
   should undergo destabilization next few hours supporting 500-1000
   J/kg MLCAPE. Very strong deep layer winds will persist in this
   region as a mid-level jet coupled with a strong low-level jet within
   eastern periphery of the upper low circulation shifts northeast
   during the day. Latest VWP data show 70 kt surface to 6 km shear and
   large 0-1 km hodographs. This high shear-low CAPE environment will
   support organized structures with mixed storm modes including bowing
   line segments and supercells as activity develops east through the
   destabilizing warm sector.

   ..Dial/Grams.. 05/01/2017
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WATCH COUNTY NOTIFICATION FOR WATCH 184
NATIONAL WEATHER SERVICE PITTSBURGH PA
1232 PM EDT MON MAY 1 2017

MDC023-OHC013-019-029-067-081-111-PAC003-005-007-019-031-051-053-
059-063-065-073-085-121-125-129-WVC009-029-049-051-061-069-077-
093-103-012300-
/O.NEW.KPBZ.TO.A.0184.170501T1632Z-170501T2300Z/

THE NATIONAL WEATHER SERVICE HAS ISSUED TORNADO WATCH 184 IN
EFFECT UNTIL 7 PM EDT THIS EVENING FOR THE FOLLOWING AREAS

IN MARYLAND THIS WATCH INCLUDES 1 COUNTY

IN WESTERN MARYLAND

GARRETT

IN OHIO THIS WATCH INCLUDES 6 COUNTIES

IN EAST CENTRAL OHIO

BELMONT               CARROLL               COLUMBIANA
HARRISON              JEFFERSON             MONROE

IN PENNSYLVANIA THIS WATCH INCLUDES 15 COUNTIES

IN NORTHWEST PENNSYLVANIA

FOREST                MERCER                VENANGO

IN SOUTHWEST PENNSYLVANIA

ALLEGHENY             FAYETTE               GREENE
WASHINGTON            WESTMORELAND

IN WEST CENTRAL PENNSYLVANIA

ARMSTRONG             BUTLER                CLARION
INDIANA               JEFFERSON

IN WESTERN PENNSYLVANIA

BEAVER                LAWRENCE

IN WEST VIRGINIA THIS WATCH INCLUDES 9 COUNTIES

IN NORTHEAST WEST VIRGINIA

PRESTON               TUCKER

IN NORTHERN WEST VIRGINIA

MARION                MONONGALIA            WETZEL

IN NORTHERN PANHANDLE OF WEST VIRGINIA

BROOKE                HANCOCK               MARSHALL
OHIO

THIS INCLUDES THE CITIES OF ALIQUIPPA, AMBRIDGE, BEAVER FALLS,
BROOKVILLE, BUTLER, CADIZ, CANONSBURG, CARROLLTON, CLARION,
COLUMBIANA, CONNELLSVILLE, DAVIS, EAST LIVERPOOL, ELLWOOD CITY,
FAIRMONT, FOLLANSBEE, FORD CITY, FRANKLIN, GRANTSVILLE,
GREENSBURG, GROVE CITY, HERMITAGE, INDIANA, KINGWOOD, KITTANNING,
LATROBE, MARTINS FERRY, MASONTOWN, MONACA, MORGANTOWN,
MOUNDSVILLE, MOUNTAIN LAKE PARK, MURRYSVILLE, NEW CASTLE,
NEW KENSINGTON, NEW MARTINSVILLE, OAKLAND MD, OIL CITY, PARSONS,
PITTSBURGH METRO AREA, PUNXSUTAWNEY, SALEM, SHARON,
ST. CLAIRSVILLE, STEUBENVILLE, TERRA ALTA, THOMAS, TIONESTA,
UNIONTOWN, WASHINGTON, WAYNESBURG, WEIRTON, WELLSBURG, WHEELING,
AND WOODSFIELD.
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9 minutes ago, blackngoldrules said:

Sun is out now where I'm at. That's just going to add fuel to the fire.

Sent from my SM-G920P using Tapatalk
 

Sun's out here too. Gonna be interesting evening especially with the Pens game. Hopefully my power stays on. 

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Looks like I might be driving through this on the way home possibly, going to be close if it makes it through before or not. No tornadoes yet, and hopefully it stays that way. I was driving home from work in 2011 when the tornado hit hempfield area. I was NE of the actual tornado, but the storm was so intense with wind, lightening strikes and pouring rain I couldn't see 2 feet in front of me, all the while my phone kept going off with weather alerts. Most intense storm I was ever outside of a building for and could do without that experience again lol.

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Severe Thunderstorm Warning

Severe Weather Statement
National Weather Service Pittsburgh PA
227 PM EDT MON MAY 1 2017

PAC003-059-125-WVC049-051-061-103-011900-
/O.CON.KPBZ.SV.W.0045.000000T0000Z-170501T1900Z/
Washington PA-Allegheny PA-Greene PA-Monongalia WV-Wetzel WV-
Marshall WV-Marion WV-
227 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR WASHINGTON...SOUTHEASTERN ALLEGHENY...GREENE...NORTHWESTERN
MONONGALIA...NORTHEASTERN WETZEL...SOUTHEASTERN MARSHALL AND
NORTHWESTERN MARION COUNTIES...

At 226 PM EDT, severe thunderstorms were located along a line
extending from near Avella to near Hundred, moving northeast at 55
mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar.

IMPACT...Trees snapped and uprooted. Power outages can be expected.

Locations impacted include...
Bethel Park...                    Morgantown...
McMurray...                       McKeesport...
Washington...                     Canonsburg...
Waynesburg...                     Star City...
Gastonville...                    West Mifflin...
Baldwin...                        Upper St. Clair...

This includes the following highways...
  Interstate 70 in Pennsylvania between mile markers 3 and 40.

  Interstate 79 in Pennsylvania between mile markers 0 and 21.

  Interstate 79 in West Virginia between mile markers 154 and 160.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area.

Intense thunderstorm lines can produce brief tornadoes and widespread
wind damage. Move to an interior room on the lowest floor of a
building.

Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.

&&

A tornado watch remains in effect until 700 PM EDT for southwestern
Pennsylvania...and northern West Virginia.

LAT...LON 3995 8051 4025 8045 4038 7977 4022 7980
      4020 7987 4016 7986 4016 7990 4009 7984
      4008 7990 4002 7989 3999 7994 4001 7999
      3998 8001 3992 7992 3984 7994 3979 7991
      3978 7994 3974 7990 3966 7992 3951 8065
TIME...MOT...LOC 1826Z 234DEG 47KT 4025 8039 3971 8050

HAIL...<.75IN
WIND...70MPH

$$
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Tornado Warning

Tornado Warning
PAC007-019-011900-
/O.NEW.KPBZ.TO.W.0003.170501T1829Z-170501T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Pittsburgh PA
229 PM EDT MON MAY 1 2017

The National Weather Service in Pittsburgh has issued a

* Tornado Warning for...
  Northeastern Beaver County in western Pennsylvania...
  Central Butler County in west central Pennsylvania...

* Until 300 PM EDT..

* At 228 PM EDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles north of Zelienople, or 11 miles west of
  Butler, moving east at 50 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without
           shelter. Mobile homes will be damaged or destroyed.
           Damage to roofs, windows, and vehicles will occur.  Tree
           damage is likely.

* This dangerous storm will be near...
  Meridian around 235 PM EDT.
  Butler, Homeacre-Lyndora and Shanor-Northvue around 240 PM EDT.

Other locations impacted by this tornadic thunderstorm include
Chicora, Fairview, Moraine State Park, Portersville, East Butler,
Prospect, West Sunbury, Hooker, Karns City and West Liberty.

This includes  Interstate 79 in Pennsylvania between mile markers 62
and 70.

Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4093 7969 4090 7969 4082 8015 4085 8018
      4086 8016 4094 8016 4112 7980
TIME...MOT...LOC 1828Z 248DEG 43KT 4090 8010

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

TAX


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Severe Thunderstorm Warning

Severe Weather Statement
National Weather Service Pittsburgh PA
231 PM EDT MON MAY 1 2017

PAC003-007-019-073-085-121-125-011900-
/O.CON.KPBZ.SV.W.0044.000000T0000Z-170501T1900Z/
Mercer PA-Washington PA-Beaver PA-Venango PA-Lawrence PA-Butler PA-
Allegheny PA-
231 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTHEASTERN MERCER...NORTH CENTRAL WASHINGTON...NORTHEASTERN
BEAVER...SOUTHWESTERN VENANGO...EASTERN LAWRENCE...BUTLER AND
ALLEGHENY COUNTIES...

At 231 PM EDT, severe thunderstorms were located along a line
extending from 11 miles northwest of Grove City to near Zelienople to
near Emsworth, moving northeast at 45 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar.

IMPACT...Trees snapped and uprooted. Power outages can be expected.

Locations impacted include...
Pittsburgh...                     Penn Hills...
Mount Lebanon...                  Bethel Park...
Ross Township...                  McCandless Township...
Monroeville...                    Cranberry...
McKeesport...                     Butler...
Franklin Park...                  Grove City...

This includes the following highways...
  Pennsylvania Turnpike between mile markers 23 and 58.

  Interstate 79 in Pennsylvania between mile markers 22 and 92.

  Interstate 80 in Pennsylvania between mile markers 15 and 35.

  Parkway North between mile markers 1 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area.

Intense thunderstorm lines can produce brief tornadoes and widespread
wind damage. Move to an interior room on the lowest floor of a
building.

Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.

&&

A tornado watch remains in effect until 700 PM EDT for western,
southwestern, northwestern and west central Pennsylvania.

LAT...LON 4027 8028 4026 8036 4040 8032 4047 8022
      4056 8015 4067 8018 4088 8018 4122 8026
      4132 7992 4103 7977 4061 7972 4059 7976
      4056 7977 4053 7971 4043 7970 4037 7977
TIME...MOT...LOC 1831Z 239DEG 41KT 4130 8018 4080 8009 4054 8011

HAIL...<.75IN
WIND...70MPH

$$
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Wow!  Incredible wind driven rain in gusts for about 15 to 20 minutes.  Felt like the glass was going to push in on the back door.   0.74" of rain in 30 minutes.  Just a few claps of thunder.

You could clearly see the rotation signal embedded on the super res velocity.  It started up around New Castle and headed NE.

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7 minutes ago, TeaysValleyWV said:

Wow!  Incredible wind driven rain in gusts for about 15 to 20 minutes.  Felt like the glass was going to push in on the back door.   0.74" of rain in 30 minutes.  Just a few claps of thunder.

You could clearly see the rotation signal embedded on the super res velocity.  It started up around New Castle and headed NE.

I anticipated the Thunder \ Lightening to be worse. While the line was in Western OH seems like there was a lot of hits on the lightening tracker. We are probably lucky this didn't come though later with a few more hours of sun to to destabilize everything.

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837
SXUS71 KPBZ 012129 RRA
RERPIT

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
520 PM MON EDT MAY 01 2017

...RECORD WARM APRIL FOR PITTSBURGH...

THE AVERAGE MONTHLY TEMPERATURE FOR APRIL 2017 IN PITSBURGH WAS 57.3
DEGREES. THIS BREAKS THE RECORD FOR THE WARMEST APRIL ON RECORD
WHICH WAS 57.2 DEGREES IN 1878. NORMAL IS 50.9 DEGREES. APRIL 2016
AVERAGED 51.3.

THIS WAS THE 15TH STRAIGHT MONTH THAT AVERAGED ABOVE NORMAL IN
PITTSBURGH, THE LONGEST SUCH STREAK ON RECORD.

PITTSBURGH TEMPERATURE RECORDS DATE BACK TO 1871.

 


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I think we might had quite an few spin up tornadoes today, The damage picture is from Plum, might be a brief but strong tornado. During the Butler/Armstrong County warned storm radar did have an debris ball on it. I think i saw spin up tornado from an friends house watching the storm, over on the hills near Tarentum. Good severe weather day, and was quite widespread wind damage day

Tornado damage plum.jpg

C-w0kWyW0AAsIlH.jpg

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Well, looks like a pretty raw weekend on tap...

NWS thinking some areas could see snow...

.LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
Unsettled weather and below normal temperatures will continue
over the weekend and into next week as ridging builds over the
central states and an omega block takes shape. Precipitation
will become more showery in nature as the low slowly migrates
over the forecast area...which now looks to be late Friday /
Saturday. With the upper low over the region through the
weekend... cool temperatures at least scattered showers will
persist. Looking at analogs there stands to be a decent chance
for snow to be observed given how cold the airmass is,
especially on the higher ridges. Numerous locations reporting a
trace of snow and 2 inches at Terra Alta was observed during the
best matching analog in early May. (5/7/1989)

By Monday, the low may pull away just enough to get our region
into the front side of a building Plains ridge, ending
precipitation. Below normal temperatures will continue however
as 500 mb heights remain suppressed. 3-4 standard deviations
below normal...with return intervals of 30 years.

Where was this -NAO in DJFM when it could have helped with storm chances... Now I await the frost and freeze warnings and try to cover the garden.

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