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December 26-27 Winter Storm Part 2


Hoosier

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As far as MBY talk on the last page, I'm really liking my position near FWA. I may not get into the heaviest bands, but no matter which way it decides to wobble, I look to be good for a healthy snow. Northern solutions keep me on the fringe of mixing/dryslot issues and southern solutions still give me a few inches. Good luck to those to my southeast and northwest.

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A little perspective from the HPC:

MODEL DIAGNOSTIC DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER COLLEGE PARK MD

155 PM EST SUN DEC 23 2012

VALID DEC 23/1200 UTC THRU DEC 27/0000 UTC

...SEE NOUS42 KWNO (ADMNFD) FOR THE STATUS OF THE UPPER AIR

INGEST...

12Z MODEL EVALUATION INCLUDING THE 12Z ECMWF AND FINAL PREFERENCES

ANY MODEL INITIALIZATION ERRORS DO NOT APPEAR TO BE SUFFICIENTLY

LARGE TO IMPACT THE SHORT RANGE FORECAST.

...SHRTWV ENERGY AMPLIFYING THROUGH THE INTERMOUNTAIN WEST ON

MON...REACHING THE CNTRL/SRN PLAINS TUE AND LIFTING TWD THE OH VLY

WED...

PREFERENCE: 12Z GFS / 12Z ECMWF

CONFIDENCE: AVERAGE

THE NAM AND 09Z SREF ARE ON THE NWRN SIDE OF THE SPREAD TUE AND

WED REGARDING THE FCST CLOSED LOW AND SFC LOW MOVING NEWD INTO THE

OHIO VALLEY...BUT ARE BY NO MEANS OUTLIER SOLUTIONS. THE GFS HAS

TRENDED SLOWER AND A BIT WEST WITH THE TRACK OF THE UPPER SYSTEM /

SFC LOW. THE LATEST 12Z RUN OF THE ECMWF HAS SHIFTED A LITTLE

NORTH FROM ITS PREVIOUS 2 RUNS...AND IS CLOSER TO ITS 00Z ENSEMBLE

MEAN...HOWEVER THE EC IS STILL A LITTLE SOUTH OF THE 12Z GEFS /

09Z SREF MEAN CLUSTER ON WED.

GIVEN OVERALL RECENT TRENDS...THE RECOMMENDATION WILL NOW INCLUDE

THE 12Z ECMWF ALONG WITH THE 12Z GFS...FAIRLY CLOSE TO THE 00Z EC

MEAN. DO NOT FEEL COMFORTABLE GOING QUITE AS FAR NW AS THE

NAM/SREF...BUT ONE MUST GIVE RESPECT TO THE NRN ENSEMBLE MEANS IN

CONTRAST TO THE SRN UKMET/CMC SOLUTIONS. THE 12Z CMC HAS COME

INTO BETTER AGREEMENT WITH THE CONSENSUS COMPARED TO ITS 00Z

RUN...BUT THE CMC CONTINUES TO BE A BIT SOUTH OF THE PREFERENCE

WITH THE UPPER LOW.

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Me too. The stingier Euro qpf might still fluff up to 4-5 inches back this way.

Ya, the qpf on the EURO is a bit meager compared to other models. Im hoping we see the NAM come back SE a bit as it made a very abrupt move NW and no models really followed. Only slight bumps NW on the others. I think after 00z tonight we may be able to make a first call.

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QPF totals for a few Indiana sites off the 12z runs. Obviously we have some different storm evolutions via all the models. There is some taint for BMG and EVV, depending on the model, so don't take the numbers as all snow. And finally, these are not gospel...just trying to compare the raw numbers. Proceed with caution.

BMG

Euro: 0.79"

GFS: 0.59"

NAM: 0.74"

EVV

Euro: ?

GFS: 0.77"

NAM: 0.96"

FWA

Euro: 0.46"

GFS: 0.47"

NAM: 0.84"

IND

Euro: 0.63"

GFS: 0.66"

NAM: 0.60"

LAF

Euro: 0.34"

GFS: 0.60"

NAM: 0.85"

MIE

Euro: ?

GFS: 0.68"

NAM: 0.73"

OKK

Euro: 0.47"

GFS: 0.59"

NAM: 0.73"

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Gonna have to watch model trends and forecasts closely on this one. Plan to go from Elkhart to Highland for Christmas dinner with relatives the 25th. Was planning to spend the night and drive back east Wed. but not if I have to face adverse conditions. A jog more nw would really put most all of northern IN in serious play.

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Another answer to your question blackrock...

GRR

.LONG TERM...(WEDNESDAY THROUGH SUNDAY)

ISSUED AT 321 PM EST SUN DEC 23 2012

LITTLE OVERALL CHANGE IN THE MODELS REGARDING THE MID WEEK SYSTEM.

THIS LEADS TO MORE CONFIDENCE. HAVE INCREASED POPS TO HIGH CHANCE

OR LIKELY ACROSS THE CWA. SURFACE LOW PRESSURE SHOULD TRACK ON THE

WESTERN SIDE ON THE APPALACHIANS ON WED. THE LIKELIHOOD OF THE

DEFORMATION ZONE CROSSING THE CWA APPEARS TO BE STRONG HENCE THE

LIKELY POPS FROM ROUGHLY BIV TO MOP SE. REGARDING PCPN TYPE...

LITTLE QUESTION AT THIS POINT...GIVEN THE PRESENT TRACK THE PCPN

WILL BE ALL SNOW ACROSS THE CWA. ALL THE MODELS CONTINUE TO

INDICATE AN EAST COAST ENERGY TRANSFER WED NIGHT. DEPENDING HOW

QUICKLY THIS MAY OCCUR WILL ULTIMATELY DETERMINE HOW MUCH SNOW

OCCURS IN SW MI. HIGHEST SNOW TOTALS STILL LOOK TO BE ACROSS THE SE

CWA...WITH 6+ INCHES COULD BE POSSIBLE FOR AREAS LIKE LAN...BTL AND

JXN. LESSER AMOUNTS OVER THE NW CWA...PERHAPS 1 TO 3 INCHES FOR

LDM...FFX AND MKG. THE REGION SHOULD SEE A NORTH WIND DURING THE

EVENT WITH GUSTS TO 30 MPH POSSIBLE.

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