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Central PA/fringes of MD - December 2013 continued


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WSW up

 

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE STATE COLLEGE PA
908 PM EST THU DEC 12 2013

...SEVERAL INCHES OF SNOW EXPECTED SATURDAY INTO SATURDAY NIGHT...

.ANOTHER SIGNIFICANT WINTER STORM WILL IMPACT CENTRAL PENNSYLVANIA
THIS WEEKEND. SEVERAL INCHES OF SNOW ARE EXPECTED FROM SATURDAY
MORNING THROUGH LATE SATURDAY NIGHT. STORM TOTAL SNOWFALL OF 6
INCHES OR MORE ARE POSSIBLE IN THE WINTER STORM WATCH AREA.

PAZ004>006-010>012-017>019-024>028-037-041-042-045-046-049>053-
056>058-131900-
/O.NEW.KCTP.WS.A.0010.131214T1000Z-131215T0600Z/
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
JUNIATA-TIOGA-NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-
SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-
PERRY-DAUPHIN-SCHUYLKILL-
INCLUDING THE CITIES OF...WARREN...BRADFORD...COUDERSPORT...
ST. MARYS...RIDGWAY...EMPORIUM...RENOVO...DUBOIS...CLEARFIELD...
PHILIPSBURG...STATE COLLEGE...JOHNSTOWN...ALTOONA...HUNTINGDON...
MOUNT UNION...LEWISTOWN...MIFFLINTOWN...MANSFIELD...WELLSBORO...
LAPORTE...LOCK HAVEN...WILLIAMSPORT...LEWISBURG...SELINSGROVE...
DANVILLE...SUNBURY...SHAMOKIN...BLOOMSBURG...BERWICK...NEWPORT...
HARRISBURG...HERSHEY...POTTSVILLE
908 PM EST THU DEC 12 2013

...WINTER STORM WATCH IN EFFECT FROM EARLY SATURDAY MORNING THROUGH
LATE SATURDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A WINTER
STORM WATCH...WHICH IS IN EFFECT FROM AROUND DAWN SATURDAY MORNING
THROUGH LATE SATURDAY NIGHT.

* LOCATIONS...CENTRAL AND NORTH CENTRAL PENNSYLVANIA.

* HAZARD TYPES...SNOW.

* ACCUMULATIONS...5 TO 8 INCHES OF SNOW.

* TIMING...SNOW WILL DEVELOP SATURDAY MORNING AND TAPER OFF LATE
SATURDAY NIGHT.

* IMPACTS...HAZARDOUS TRAVEL ON SNOW PACKED AND SLIPPERY ROADS.

* WINDS...EAST 5 TO 10 MPH WITH LOCAL GUSTS BETWEEN 15 AND 20 MPH.

* TEMPERATURES...IN THE LOWER TO MIDDLE 20S.

DEVOIR

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I've only lived here for a year but I know enough about this game to know what happens many times. With no block in place there's no reason for the overrunning moisture to scream eastward and once the energy transfers, the precip shield shrinks and focuses on eastern coastal New Jersey and points north and east. Were left with broken radar echoes as north jersey goes to town.

I would be more worried if this was a classic miller b system. With most of these recently the h5 support is amplifying and it's a dynamic bombing system. This leads to consolidating of energy and a contracted precip field and our location further inland gets screwed. This time the h5 is not really amplified and the upper support is actually back over the lakes. The surface low sneaks under the high but this is waa driven from the stj running into an arctic high mostly. I don't think we will se a crazy screw zone. No one is getting 20" from this but I think a more widespread 3-6 or 4-8 is likely. These type systems have been more rare lately.
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I would be more worried if this was a classic miller b system. With most of these recently the h5 support is amplifying and it's a dynamic bombing system. This leads to consolidating of energy and a contracted precip field and our location further inland gets screwed. This time the h5 is not really amplified and the upper support is actually back over the lakes. The surface low sneaks under the high but this is waa driven from the stj running into an arctic high mostly. I don't think we will se a crazy screw zone. No one is getting 20" from this but I think a more widespread 3-6 or 4-8 is likely. These type systems have been more rare lately.

Don't look at the latest nam! I think this storm has the potential for some surprises. For some reason my gut tells me interior New Jersey is the place to be. The latest nam though screws lsv and the Wyoming valley. It bombs the low off jersey.

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Don't look at the latest nam! I think this storm has the potential for some surprises. For some reason my gut tells me interior New Jersey is the place to be. The latest nam though screws lsv and the Wyoming valley. It bombs the low off jersey.

I don't usually pay any attention to the nam. It can't get yesterday right. Rgem is a much better high res model IMHO. Also I guess it's a matter of expectations. I wouldn't call 4-5" of snow getting "screwed". My expectations are in check for this. It has potential to be solid but not a major event. I also don't buy the overdone precip in nj and a decent percent of that is ice or rain anyways. Besides if we get 5" and nj gets 10 that's not really a screw job. That's when we get 2" and nj gets 15". It's all opinion of course.
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NAM text for KUNV

 

131214/0800Z 32 VRB02KT 23.3F 0:1| 0.0|| 0.00|| 0.00|| 0.000 0:1| 0.0|| 0.00|| 0.00|| 0.00 0| 0| 0
131214/0900Z 33 09003KT 24.0F 0:1| 0.0|| 0.00|| 0.00|| 0.000 0:1| 0.0|| 0.00|| 0.00|| 0.00 0| 0| 0
131214/1000Z 34 10005KT 24.2F SNOW 9:1| 0.0|| 0.00|| 0.00|| 0.003 9:1| 0.0|| 0.00|| 0.00|| 0.00 100| 0| 0
131214/1100Z 35 12005KT 24.2F SNOW 15:1| 0.4|| 0.00|| 0.00|| 0.029 14:1| 0.5|| 0.00|| 0.00|| 0.03 100| 0| 0
131214/1200Z 36 11006KT 23.8F SNOW 10:1| 0.3|| 0.00|| 0.00|| 0.029 12:1| 0.8|| 0.00|| 0.00|| 0.06 100| 0| 0
----------------------------------------------+----++-----+-------------++--------------++-------------++-----------+---+---
131214/1300Z 37 11007KT 23.8F SNOW 11:1| 0.3|| 0.00|| 0.00|| 0.023 12:1| 1.0|| 0.00|| 0.00|| 0.08 100| 0| 0
131214/1400Z 38 12008KT 24.3F SNOW 13:1| 0.3|| 0.00|| 0.00|| 0.020 12:1| 1.3|| 0.00|| 0.00|| 0.10 100| 0| 0
131214/1500Z 39 12007KT 25.4F SNOW 13:1| 0.2|| 0.00|| 0.00|| 0.019 12:1| 1.5|| 0.00|| 0.00|| 0.12 100| 0| 0
131214/1600Z 40 12009KT 26.0F SNOW 10:1| 0.2|| 0.00|| 0.00|| 0.022 12:1| 1.8|| 0.00|| 0.00|| 0.15 100| 0| 0
131214/1700Z 41 12009KT 26.3F SNOW 14:1| 0.3|| 0.00|| 0.00|| 0.024 12:1| 2.1|| 0.00|| 0.00|| 0.17 100| 0| 0
131214/1800Z 42 12010KT 26.5F SNOW 12:1| 0.4|| 0.00|| 0.00|| 0.034 12:1| 2.5|| 0.00|| 0.00|| 0.20 100| 0| 0
----------------------------------------------+----++-----+-------------++--------------++-------------++-----------+---+---
131214/1900Z 43 12010KT 26.9F SNOW 8:1| 0.3|| 0.00|| 0.00|| 0.032 12:1| 2.8|| 0.00|| 0.00|| 0.24 100| 0| 0
131214/2000Z 44 12011KT 27.6F SNOW 6:1| 0.1|| 0.00|| 0.00|| 0.020 11:1| 2.9|| 0.00|| 0.00|| 0.26 100| 0| 0
131214/2100Z 45 12011KT 27.4F SNOW 5:1| 0.1|| 0.00|| 0.00|| 0.018 11:1| 3.0|| 0.00|| 0.00|| 0.27 100| 0| 0
131214/2200Z 46 12012KT 27.0F SNOW 8:1| 0.1|| 0.00|| 0.00|| 0.017 11:1| 3.1|| 0.00|| 0.00|| 0.29 100| 0| 0
131214/2300Z 47 11012KT 26.1F SNOW 5:1| 0.2|| 0.00|| 0.00|| 0.039 10:1| 3.3|| 0.00|| 0.00|| 0.33 100| 0| 0
131215/0000Z 48 11012KT 24.9F SNOW 6:1| 0.4|| 0.00|| 0.00|| 0.056 10:1| 3.7|| 0.00|| 0.00|| 0.39 100| 0| 0
----------------------------------------------+----++-----+-------------++--------------++-------------++-----------+---+---
131215/0100Z 49 11012KT 23.3F SNOW 6:1| 0.3|| 0.00|| 0.00|| 0.057 9:1| 4.0|| 0.00|| 0.00|| 0.44 100| 0| 0
131215/0200Z 50 11012KT 22.2F SNOW 9:1| 0.2|| 0.00|| 0.00|| 0.027 9:1| 4.2|| 0.00|| 0.00|| 0.47 100| 0| 0
131215/0300Z 51 11011KT 21.3F SNOW 9:1| 0.2|| 0.00|| 0.00|| 0.026 9:1| 4.5|| 0.00|| 0.00|| 0.50 100| 0| 0
131215/0400Z 52 11009KT 20.6F SNOW 9:1| 0.2|| 0.00|| 0.00|| 0.028 9:1| 4.7|| 0.00|| 0.00|| 0.52 100| 0| 0
131215/0500Z 53 10007KT 20.2F SNOW 8:1| 0.4|| 0.00|| 0.00|| 0.044 9:1| 5.1|| 0.00|| 0.00|| 0.57 100| 0| 0
131215/0600Z 54 10006KT 20.0F SNOW 6:1| 0.3|| 0.00|| 0.00|| 0.048 9:1| 5.3|| 0.00|| 0.00|| 0.62 100| 0| 0
----------------------------------------------+----++-----+-------------++--------------++-------------++-----------+---+---
131215/0700Z 55 09004KT 20.0F SNOW 6:1| 0.2|| 0.00|| 0.00|| 0.036 9:1| 5.6|| 0.00|| 0.00|| 0.65 100| 0| 0
131215/0800Z 56 VRB02KT 20.2F SNOW 6:1| 0.2|| 0.00|| 0.00|| 0.035 8:1| 5.8|| 0.00|| 0.00|| 0.69 100| 0| 0
131215/0900Z 57 VRB02KT 20.4F SNOW 6:1| 0.2|| 0.00|| 0.00|| 0.037 8:1| 6.0|| 0.00|| 0.00|| 0.72 100| 0| 0
131215/1000Z 58 VRB02KT 20.4F SNOW 6:1| 0.1|| 0.00|| 0.00|| 0.024 8:1| 6.2|| 0.00|| 0.00|| 0.75 100| 0| 0
131215/1100Z 59 33003KT 20.6F SNOW 6:1| 0.1|| 0.00|| 0.00|| 0.011 8:1| 6.2|| 0.00|| 0.00|| 0.76 100| 0| 0
131215/1200Z 60 01003KT 20.6F SNOW 5:1| 0.0|| 0.00|| 0.00|| 0.008 8:1| 6.3|| 0.00|| 0.00|| 0.77 100| 0| 0
----------------------------------------------+----++-----+-------------++--------------++-------------++-----------+---+---
131215/1300Z 61 05003KT 20.9F FZDZ 0:1| 0.0|| 0.00|| 0.00|| 0.005 8:1| 6.3|| 0.00|| 0.00|| 0.77 0| 0|100
131215/1400Z 62 VRB01KT 22.7F FZDZ 0:1| 0.0|| 0.00|| 0.00|| 0.005 8:1| 6.3|| 0.00|| 0.01|| 0.78 0| 0|100
131215/1500Z 63 VRB02KT 25.4F FZDZ 0:1| 0.0|| 0.00|| 0.00|| 0.004 8:1| 6.3|| 0.00|| 0.01|| 0.78 0| 0|100

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GFS looks wetter. And warmer I believe (I'm not great at temp profiles). Watch this end up as a rainstorm. I'll kill something.

No Rainstorm. High Pressure to the north positioned very good for us. If anything we go to a mix but that is after several inches of snow. GFS is warmer than NAM both are wetter. Just IMO I am no expert but have been following looking at models for years. This is a good setup for us.

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