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Central PA and The Fringes - February 2014 Part II


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People keep bringing up the sleet pack from the 2007 VDay debacle. My car at the time (dodge stratus) was cemented to the earth in that nonsense because my landlord was too cheap to plow. After about a week of walking about Palmyra as if I were Moses or something, I asked a few of my landlord's nephews to help me get my car out of the glacier. These geniuses decided to place a wooden plank under my back tire and stand behind it as they tried to used it for grip.

 

Needless to say, the wooden plank shot into a dude's ankle at a high rate of speed and the Waaaaambulance was called in for a nice trip to Hershey.

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It's going to be REALLY interesting how high we can get tomorrow, my guess is that temps are going to under perform tomorrow with the snowpack and the clouds moving in. NAM has dense clouds 15kft thick from 250 to 500mb from 11a to sundown tomorrow.

If places that are going to get ZR don't get above, lets call it 26 tomorrow, there's going to be trouble.

I completely agree JT. Tonights lows are supposed to get into teens and temps are already on their way south. With a fresh cold airmass funneling its way down east of the apps over a high water content snowfall spells recipe for under performing temps from refrigerator effect. The clouds will just be icing on cake really to lock in temps before precip arrives tomorrow night.

The question then becomes how far up aloft can we cool down the levels below 0 C. I mentioned earlier about RT 30 being the dividing line between IP and ZR as you mentioned not too long ago, so we're def on the same page. I have CWS with Eric tomorrow afternoon, so the discussion will be pretty in depth. I am very interested on his take with this storm. I'll probably recap the discussion on here. Ice is pretty, but too much could be devestating. The total moisture involved in this system will probably be under forecasted for entire area. Southern stream systems usually over perform qpf wise.

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Any thoughts as to where we stand now Mag?

 

GFS/GEFS seem to have warmed somewhat tonight, probably introducing more sleet to the central and more ice in the south. The Euro coming in is mostly the same as 12z but having the 0C dip just a tad east.. having UNV right on the line and the dip being more into the Lower Sus Valley. MDT looks to stay below zero at 850mb for the best precip frame with York/LNS being very close to that 0 line. The NAM and SREFs have really come around today with the more frozen vs freezing outcome, so i'll be curious to see what the outcome of the 03z run looks like tonight. Gonna try to throw a map out later tonight. Roughly speaking for the central counties I think the US 22 corridor from Altoona to Lewistown and all the way to where the it crosses the Susquehanna at Duncannon will be representative of the 6" line on my map. 

 

The weekend storm has apparently went back to unicorn status tonight, with the GFS being the best option with a wave of moderate snow rolling through the state as the low rapidly deepens off the NC coast and pushes out northeast and outside the benchmark. GFS ensemble mean and new Euro rolling out shows practically a non event for everyone. Weenies are going to lose their mind, but the setups there for a storm this weekend and we're still 5-6 days out on that one. I've been looking at this storm on models but concentrating on our other two more immediate threats one at a time. We got a significant high impact event that will be striking us tomorrow night into Wednesday, and once that gets through we'll see what we have with the weekend event. 

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PAZ024>026-033>036-041915-
/O.UPG.KCTP.WS.A.0002.140205T0000Z-140206T0400Z/
/O.NEW.KCTP.WS.W.0004.140205T0000Z-140205T2100Z/
CAMBRIA-BLAIR-HUNTINGDON-SOMERSET-BEDFORD-FULTON-FRANKLIN-
INCLUDING THE CITIES OF...JOHNSTOWN...ALTOONA...HUNTINGDON...
MOUNT UNION...SOMERSET...BEDFORD...MCCONNELLSBURG...CHAMBERSBURG
405 AM EST TUE FEB 4 2014

...WINTER STORM WARNING IN EFFECT FROM 7 PM THIS EVENING TO 4 PM
EST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A WINTER
STORM WARNING FOR SNOW...SLEET AND FREEZING RAIN...WHICH IS IN
EFFECT FROM 7 PM THIS EVENING TO 4 PM EST WEDNESDAY. THE WINTER
STORM WATCH IS NO LONGER IN EFFECT.

* LOCATIONS...THE LAUREL HIGHLANDS AND SOUTH-CENTRAL MOUNTAINS.

* HAZARD TYPES...THE MAIN THREAT IS HEAVY ACCRETIONS OF ICE FROM
FREEZING RAIN...BUT SIGNIFICANT AMOUNTS OF SLEET AND SNOW ARE
ALSO POSSIBLE.

* ACCUMULATIONS...UP TO ONE HALF INCH OF ICE ACCRETION...AS WELL
AS 2 TO 4 INCHES OF SLEET AND SNOW.

* TIMING...SNOW WILL MOVE IN FROM THE WEST THIS EVENING...AND TURN
TO SLEET AND THEN FREEZING RAIN. THE HEAVIEST FREEZING RAIN AND
SLEET WILL FALL FOR 9 TO 12 HOURS...TAPERING OFF LATE IN THE
MORNING. SOME LOCATIONS ALONG THE MARYLAND BORDER WILL PROBABLY
TURN TO PLAIN RAIN ON WEDNESDAY. SNOW SHOWERS WILL THEN START
UP FOR THE AFTERNOON...ESPECIALLY IN THE LAUREL HIGHLANDS OF
CAMBRIA AND SOMERSET COUNTIES.

* IMPACTS...THE HEAVY ICE AND SLEET WILL LIKELY RESULT IN
WIDESPREAD POWER OUTAGES AS TREES AND POWER LINES BECOME
STRESSED UNDER THE WEIGHT OF THE ICE. TRAVEL WILL BE EXTREMELY
DANGEROUS...AND COULD BE SLOWED TO A NEAR STOP OVERNIGHT AND
WEDNESDAY MORNING AS THE HEAVY PRECIPITATION WILL MAKE IT
DIFFICULT TO KEEP THE ROADS PASSABLE.

* WINDS...SOUTHEAST 5 TO 15 MPH WITH GUSTS UP TO 30 MPH.

* TEMPERATURES...IN THE 20S.

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PAZ019-027-028-045-046-049>053-056>059-063>066-041915-
/O.UPG.KCTP.WS.A.0002.140205T0000Z-140206T0400Z/
/O.NEW.KCTP.WS.W.0004.140205T0300Z-140205T2100Z/
SOUTHERN CENTRE-MIFFLIN-JUNIATA-SOUTHERN CLINTON-
SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-
PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER-
INCLUDING THE CITIES OF...STATE COLLEGE...LEWISTOWN...
MIFFLINTOWN...LOCK HAVEN...WILLIAMSPORT...LEWISBURG...
SELINSGROVE...DANVILLE...SUNBURY...SHAMOKIN...BLOOMSBURG...
BERWICK...NEWPORT...HARRISBURG...HERSHEY...POTTSVILLE...LEBANON...
CARLISLE...GETTYSBURG...YORK...LANCASTER
405 AM EST TUE FEB 4 2014

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 PM
EST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A WINTER
STORM WARNING FOR SNOW...SLEET AND FREEZING RAIN...WHICH IS IN EFFECT
FROM 10 PM THIS EVENING TO 4 PM EST WEDNESDAY. THE WINTER STORM
WATCH IS NO LONGER IN EFFECT.

* LOCATIONS...THE CENTRAL MOUNTAINS AND SUSQUEHANNA VALLEY.

* HAZARD TYPES...A WINTRY MIX OF SNOW...SLEET AND FREEZING RAIN.

* ACCUMULATIONS...2 TO 6 INCHES OF SNOW AND SLEET...ALONG WITH ONE
TO TWO TENTHS OF AN INCH OF ICE FROM FREEZING RAIN. THE MOST
FREEZING RAIN WILL BE CLOSE TO THE MARYLAND BORDER AND THE MOST
SNOW WILL OCCUR FROM STATE COLLEGE TO WILLIAMSPORT AND BLOOMSBURG.

* TIMING...SNOW WILL MOVE IN FROM THE WEST LATE THIS EVENING. THE
PRECIPITATION CHANGE TO SLEET IN THE MIDDLE OF THE NIGHT AND
THEN TO FREEZING RAIN. SNOW WILL LAST THE LONGEST NORTH OF
ROUTE 22. THE PRECIPITATION WILL TAPER OFF IN THE AFTERNOON.

* IMPACTS...TRAVEL WILL BECOME EXTREMELY HAZARDOUS AND COULD BE
SLOWED TO A NEAR STOP AS SLEET AND FREEZING RAIN BECOME THE
DOMINANT PRECIPITATION TYPES OVERNIGHT. THE HEAVY FALL RATES OF
THE MIXED PRECIPITATION WILL MAKE IT VERY DIFFICULT TO KEEP THE
ROADS PASSABLE. POWER OUTAGES ARE ALSO EXPECTED AS THE WEIGHT OF
THE SNOW...SLEET AND FREEZING RAIN STRESS THE TREES AND POWER
LINES.

* WINDS...NORTHEAST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH.

* TEMPERATURES...IN THE UPPER 20S.

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URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE STATE COLLEGE PA
405 AM EST TUE FEB 4 2014

PAZ004>006-010>012-017-018-037-041-042-041915-
/O.UPG.KCTP.WS.A.0002.140205T0000Z-140206T0400Z/
/O.NEW.KCTP.WS.W.0004.140205T0000Z-140206T0000Z/
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-TIOGA-NORTHERN LYCOMING-SULLIVAN-
INCLUDING THE CITIES OF...WARREN...BRADFORD...COUDERSPORT...
ST. MARYS...RIDGWAY...EMPORIUM...RENOVO...DUBOIS...CLEARFIELD...
PHILIPSBURG...MANSFIELD...WELLSBORO...LAPORTE
405 AM EST TUE FEB 4 2014

...WINTER STORM WARNING IN EFFECT FROM 7 PM THIS EVENING TO 7 PM
EST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A WINTER
STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 7 PM THIS
EVENING TO 7 PM EST WEDNESDAY. THE WINTER STORM WATCH IS NO LONGER
IN EFFECT.

* LOCATIONS...NORTH CENTRAL PENNSYLVANIA.

* HAZARD TYPES...HEAVY SNOW.

* ACCUMULATIONS...8 TO 14 INCHES OF SNOW.

* TIMING...SNOW WILL MOVE IN FROM THE WEST LATE THIS
EVENING...BECOMING HEAVY OVERNIGHT AND CONTINUING THROUGH LATE
AFTERNOON. SOME SLEET AND FREEZING RAIN MAY MIX IN DURING THE
DAY ON WEDNESDAY...BUT THE HEAVY SNOW IS THE MAIN THREAT.

* IMPACTS...TRAVEL WILL BE EXTREMELY DIFFICULT. SIGNIFICANT DELAYS
IN TRAFFIC MAY RESULT DUE TO SNOW FALL RATES OF 1 TO 2 INCHES
PER HOUR OVERNIGHT. POWER OUTAGES ARE POSSIBLE AS TREES AND
POWER LINES WILL BE STRESSED UNDER THE WEIGHT OF THE SNOW.

* WINDS...NORTHEAST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH.

* TEMPERATURES...IN THE LOWER 20S.

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