Mailman Posted May 1, 2017 Share Posted May 1, 2017 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 Link to comment Share on other sites More sharing options...
Mailman Posted May 1, 2017 Share Posted May 1, 2017 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. Link to comment Share on other sites More sharing options...
blackngoldrules Posted May 1, 2017 Share Posted May 1, 2017 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 Link to comment Share on other sites More sharing options...
Rdd9108 Posted May 1, 2017 Share Posted May 1, 2017 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. Link to comment Share on other sites More sharing options...
Mailman Posted May 1, 2017 Share Posted May 1, 2017 Seems like it should be out of here prior to the puck drop. Link to comment Share on other sites More sharing options...
Rdd9108 Posted May 1, 2017 Share Posted May 1, 2017 1 minute ago, Mailman said: Seems like it should be out of here prior to the puck drop. Yeah but if there's wind it may knock the power lines down. Link to comment Share on other sites More sharing options...
CranberryWX Posted May 1, 2017 Share Posted May 1, 2017 Wind is really kicking before the line gets here Link to comment Share on other sites More sharing options...
CranberryWX Posted May 1, 2017 Share Posted May 1, 2017 Two bows sticking out in the line, one heading just north of the airport and one above that in Beaver county.....all heading SW to NE. Link to comment Share on other sites More sharing options...
KPITSnow Posted May 1, 2017 Author Share Posted May 1, 2017 Looks like the worst of the storm is going to slide just north of my location in Bellevue and in the coty, and I am totally fine with that. Link to comment Share on other sites More sharing options...
north pgh Posted May 1, 2017 Share Posted May 1, 2017 13 minutes ago, TeaysValleyWV said: Two bows sticking out in the line, one heading just north of the airport and one above that in Beaver county.....all heading SW to NE. These bows will probably have gusts close to 60 mph. Should be on me in about 20 min Link to comment Share on other sites More sharing options...
Rdd9108 Posted May 1, 2017 Share Posted May 1, 2017 This is only one line right. There's supposed to be another one later? Link to comment Share on other sites More sharing options...
KPITSnow Posted May 1, 2017 Author Share Posted May 1, 2017 Just now, Rdd9108 said: This is only one line right. There's supposed to be another one later? I think this is it. Link to comment Share on other sites More sharing options...
RitualOfTheTrout Posted May 1, 2017 Share Posted May 1, 2017 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. Link to comment Share on other sites More sharing options...
meatwad Posted May 1, 2017 Share Posted May 1, 2017 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 $$ Link to comment Share on other sites More sharing options...
RitualOfTheTrout Posted May 1, 2017 Share Posted May 1, 2017 1 minute ago, KPITSnow said: I think this is it. Yeah, once this line goes through I think all the watches will end. Link to comment Share on other sites More sharing options...
meatwad Posted May 1, 2017 Share Posted May 1, 2017 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 Link to comment Share on other sites More sharing options...
meatwad Posted May 1, 2017 Share Posted May 1, 2017 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 $$ Link to comment Share on other sites More sharing options...
blackngoldrules Posted May 1, 2017 Share Posted May 1, 2017 It's about to get nasty here. Winds really picking up now.Sent from my SM-G920P using Tapatalk Link to comment Share on other sites More sharing options...
Jmister Posted May 1, 2017 Share Posted May 1, 2017 http://www.lightningmaps.org/ is showing considerably less lightning than I would have thought with a line like this. Are any of you experiencing good thunder/lightning? Link to comment Share on other sites More sharing options...
Rdd9108 Posted May 1, 2017 Share Posted May 1, 2017 Zero lightning. Kind of disappointing to be quite honest. Link to comment Share on other sites More sharing options...
blackngoldrules Posted May 1, 2017 Share Posted May 1, 2017 Didn't see any lightning or hear any thunder. Even the wind died down here once the rain started. Not impressed. Link to comment Share on other sites More sharing options...
meatwad Posted May 1, 2017 Share Posted May 1, 2017 Nothing here but heavy rain. No Thunder or lightning. Link to comment Share on other sites More sharing options...
Jmister Posted May 1, 2017 Share Posted May 1, 2017 That's what I figured. It looks nasty on radar but I guess that doesn't necessarily correlate to lightning. Link to comment Share on other sites More sharing options...
CranberryWX Posted May 1, 2017 Share Posted May 1, 2017 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. Link to comment Share on other sites More sharing options...
RitualOfTheTrout Posted May 1, 2017 Share Posted May 1, 2017 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. Link to comment Share on other sites More sharing options...
meatwad Posted May 1, 2017 Share Posted May 1, 2017 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. Link to comment Share on other sites More sharing options...
CoraopolisWx Posted May 1, 2017 Share Posted May 1, 2017 Usually our biggest storms come from a WNW flow aloft, and a humid SW flow at the surface. It's kinda difficult to get widespread hail/rotation, with these set ups. Link to comment Share on other sites More sharing options...
JoJo Posted May 1, 2017 Share Posted May 1, 2017 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 Link to comment Share on other sites More sharing options...
RitualOfTheTrout Posted May 3, 2017 Share Posted May 3, 2017 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. Link to comment Share on other sites More sharing options...
PghPirates27 Posted May 5, 2017 Share Posted May 5, 2017 Just saw there is an "omega block" setting up for this weekend. Where is the Omega block in the winter when there is a mass of precipitation headed our way?!?! Is such a thing possible say... in January? Link to comment Share on other sites More sharing options...
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