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Pittsburgh/Western Pa Weather


meatwad

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Nothing but a dusting here but icy spots as all wet areas have frozen solid.

 

Looking at HRR most of our snow will come early am so don't let your guard down. Looks like a good couple of hours of moderate snow. Rush hour may have problems.

 

Glad I don't have to work tomorrow. We'll see if the HRR turns out to be right. I was basically just eyeballing it earlier.

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Sickening gradient on the radar.

 

You go from 25dbz to flurries within 20-30 miles

Fixed. I dirve about 28 miles SE from my house to work in Greensburg, I feel like its very likely I go from a measly 1 -2 inches to 4-6 in that short distance. Frustrating to be so close to a signifcant storm and miss again. Second time this year. Sorry, had to get my toddler temper tantrum vented. :baby:

 

With any lucky, maybe the University will close and I won't even have to shovel my sidewalk. :wacko:

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mcd0058.gif

 

MESOSCALE DISCUSSION 0058
NWS STORM PREDICTION CENTER NORMAN OK
1021 PM CST SUN FEB 02 2014

AREAS AFFECTED...KY...SRN IND...SRN OH...WV...SWRN PA...WRN MD...FAR
NRN VA

CONCERNING...WINTER MIXED PRECIPITATION

VALID 030421Z - 030945Z

SUMMARY...LARGE SHIELD OF MIXED PRECIPITATION WILL SPREAD FROM
KY/NRN TN NORTHEAST INTO WV...WRN MD...AND SWRN PA...WITH SOME
INCREASE IN PRECIPITATION RATES POSSIBLE LATE TONIGHT. SNOW WILL BE
THE DOMINANT PRECIP TYPE ACROSS THE NRN PART OF THE MCD AREA WITH
RATES OF 1-2 IN/HR BECOMING INCREASINGLY LIKELY AFTER 06Z. A NARROW
ZONE OF HEAVY ICING WILL BE POSSIBLE FROM NRN TN INTO SRN KY.

DISCUSSION...A LARGE SHIELD OF WINTER PRECIP IS ONGOING AS OF 0400Z
ACROSS MUCH OF KY AND NRN TN...AHEAD OF A PROGRESSIVE UPPER WAVE
MOVING INTO THE MS VALLEY. SUBSTANTIAL MOISTURE IS IN PLACE AHEAD OF
THIS WAVE...WITH 1 INCH PW VALUES NOTED AS FAR NORTH AS BNA ON THE
00Z RAOB. A STRONG LOW-LEVEL JET WILL CONTINUE TO TRANSPORT THIS
MOISTURE OVER THE LEADING EDGE OF A COLD DOME...GENERATING A LARGE
AREA OF MODERATE TO HEAVY PRECIPITATION.

WHILE LOW-LEVEL COLD ADVECTION IS NOT PARTICULARLY STRONG...THE SFC
FREEZING LINE HAS BEEN MOVING SLOWLY SWD THIS EVENING AND WILL
CONTINUE TO DO SO OVERNIGHT. FREEZING RAIN WILL CONTINUE FROM NRN TN
INTO SRN KY...WITH ICING RATES AOA 0.05 IN/HR POSSIBLE. GRADUAL
DEEPENING OF THE COLD DOME ACROSS THE NRN PART OF THE MCD AREA WILL
RESULT IN A TRANSITION TO PRIMARILY SNOW...WITH THE SNOW/FZRA LINE
EXPECTED TO SLOWLY MOVE SWD WITH TIME. A CONSENSUS OF 00Z GUIDANCE
INDICATES THE LLJ INCREASING TO 70-80 KTS AFTER 06Z...WHICH WILL
SERVE TO INCREASE PRECIP RATES FROM ERN KY INTO SRN OH...NRN
WV...AND SWRN PA LATE TONIGHT...WITH SNOW RATES OF 1-2 IN/HR
BECOMING INCREASINGLY LIKELY.

..DEAN.. 02/03/2014

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lol

 

Fixed. I dirve about 28 miles SE from my house to work in Greensburg, I feel like its very likely I go from a measly 1 -2 inches to 4-6 in that short distance. Frustrating to be so close to a signifcant storm and miss again. Second time this year. Sorry, had to get my toddler temper tantrum vented. :baby:

 

With any lucky, maybe the University will close and I won't even have to shovel my sidewalk. :wacko:

post-328-0-28552200-1391425107_thumb.jpg  :lol: 

 

I've got a dusting of snow at best.... :violin: Oh well, at least I get to go back to bed for a few hours. 

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About 7" down here and still coming down at a decent rate.  Most of that snow was dropped over a four-hour period, as I went to bed around 3 am and we only had a couple inches.  If it hadn't been so warm the last couple days we may have done a bit better.  Definitely taking this as in two days it will be washed away by rain, unfortunately.

 

Hopefully Saturday or Sunday/Monday (depending on which model you choose) stays on course and it's a more widespread event for everyone.

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Found this regarding sampling of Wed storm.

 

The system was partially sampled by 03/00z RAOBs in CA, but this feature`s path
through northern Mexico will likely preclude full sampling until it
reaches western TX around 12z Tu
. This means that 1) models will
likely struggle to capture the true strength of the system, 2)
model depictions of the H5/H85/sfc low tracks may shift around a
bit, leading to changes in the forecast onset of precipitation as
well as changes to ptypes and 3) last minute forecast adjustments to the axis of heaviest snowfall
may be required after the 12z models come in on Tue because those
runs will have incorporated the most recent upper air observations.

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NWS, says pretty much no snow accumulation for AGC for Tue/Wed

 

Tuesday Night Rain, snow, and freezing rain likely before midnight, then snow, freezing rain, and sleet between midnight and 2am, then freezing rain and sleet after 2am. Low around 30. Northeast wind 8 to 11 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

  • Wednesday Snow and freezing rain likely before 11am, then a chance of snow. Cloudy, with a high near 35. Northwest wind 6 to 13 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

.SHORT TERM /TUESDAY THROUGH WEDNESDAY/...
 

-- Changed Discussion --

INFLUENCE OF HIGH PRESSURE WILL BE SHORT LIVED AS LOW PRESSURE WILL ADVANCE FROM THE SOUTHWEST. ALTHOUGH TUESDAY WILL BE DRY...TUESDAY NIGHT WILL BE THE PRIMARY TIME FOR PRECIPITATION ACROSS THE ENTIRE REGION. ALTHOUGH THE NAM AND SREF HAVE NOW TRENDED TOWARDS THE REST OF THE MODEL GUIDANCE WHICH KEEPS THE SURFACE LOW FARTHER SOUTH AND EAST...DIFFERENCES IN THE TRACK OF THE 850MB LOW BETWEEN MODELS MAKES FORECASTING SPECIFIC PRECIPITATION TYPES VERY DIFFICULT. HAVE ISSUED A WINTER STORM WATCH FOR MOST AREAS NORTH OF PITTSBURGH...AS THIS IS THE AREA WITH HIGHER CONFIDENCE THAT WARNING CRITERIA SNOW WILL BE REACHED...ALTHOUGH SOME OF THESE COUNTIES WILL LIKELY SEE SOME SLEET OR FREEZING RAIN MIX IN AS WELL. EXCEPT FOR THE SOUTHERNMOST COUNTIES...WHERE PRECIPITATION COULD MANAGE TO REMAIN RAIN THE ENTIRE TIME...THE REST OF THE FORECAST AREA COULD RECEIVE NEARLY ANY PRECIPITATION TYPE. AM ALSO CONCERNED THAT THE RIDGES COULD HAVE A PROLONGED PERIOD OF FREEZING RAIN...ALTHOUGH CONFIDENCE IS STILL LACKING ABOUT THE POSSIBLE ICE ACCUMULATION TO ISSUE A WATCH AT THIS TIME. FINALLY...ONE MORE CONCERN IS THAT IN LOCATIONS THAT RECEIVE PRIMARILY RAIN...RUNOFF COULD POTENTIALLY LEAD TO THE CREATION OF ICE JAMS ON LOCAL RIVERS. WITH THE SPEED OF THE SYSTEM...PRECIPITATION WILL BE CONTAINED TO ABOUT A 12 HOUR WINDOW...AND PRECIP SHOULD RAPIDLY DECREASE WEDNESDAY MORNING INTO THE AFTERNOON HOURS. SOME LIGHT SNOW COULD CONTINUE IN THE TYPICAL LAKE EFFECT AND UPSLOPE AREAS...BUT A FROZEN LAKE ERIE SHOULD LIMIT THE AMOUNT OF MOISTURE AVAILABLE. TEMPERATURES THROUGH THE SHORT TERM SHOULD BE WITHIN A FEW DEGREES OF NORMAL.

-- End Changed Discussion --
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