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January 17-19th Plains/MW/Lakes Storm Potential


A-L-E-K

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loll at hr 138 has a sub 990 low on LI. Looks like some backend snows for philly/nyc and them on the east coast.

That would be 3 strong lows on the east coast this season (if it were to verify)

I'll try and get QPF totals in a second.

If there truly is a god in this universe we wont see another eastcoast bomb/storm the rest of this damn winter. :lol: Sorry but it is time for them to end too. :devilsmiley:

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Where is the cold air? The 2m temps have consistently been to warm on all the models eventhough the 540 and 850's are too high.... You would think with the snowcover those 2m temps would be a bit lower.

as long as there is a low over the lakes, it will be a messy set up at best, and probably a fairly weak one for us too. GFS is the only model showing that big slug of moisture coming up the OV from the gulf out in front of the storm.

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Gotta love how it does that with NO blocking. :lol:

Anything is possible ofcourse but i find that highly unlikely unless there is some blocking/blocker.

nugget from the HPC extended discussion

BEFORE THE EASTERN PACIFIC RIDGE AMPLIFIES WHICH

SHOULD WEAKEN THE ONSHORE FLOW LATE NEXT WEEK. TEMPERATURES

SHOULD SLOWLY MODIFY ACROSS THE EAST AS THE STORM TRACK/UPPER

TROUGH SETS UP FARTHER WEST THAN SEEN OVER THE PAST SIX

WEEKS...WHICH COULD BE THE BEGINNING OF THE JANUARY THAW.

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Sounds like IND is concerned with mixing only for their far south cwa.

AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE INDIANAPOLIS IN

320 PM EST THU JAN 13 2011

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...

ALL MODELS MOVE A LOW PRESSURE SYSTEM OUR WAY AROUND MONDAY NIGHT.

BUT THERE IS QUITE A BIT OF DIFFERENCE IN THE STRENGTH BETWEEN

MODELS. GFS ENSEMBLES INDICATE A 993 TO 1003 MB SURFACE

LOW...EUROPEAN 1004 MB AND CANADIAN 1010 MB. AT TIME SEE LITTLE

REASON TO DIFFER WITH POPS. BUT MADE SOME ADJUSTMENTS TO

TEMPERATURES MAINLY TO GO A LITTLE WARMER SUNDAY NIGHT AND COOLER

MONDAY WHICH SEEMS TO BLEND IN BETTER WITH MODELS. WILL MENTION

MIXED PRECIP ACROSS OUR FAR SOUTH MONDAY AFTERNOON THROUGH TUESDAY

MORNING.

GIVEN THAT THE GFS IS ONE STRONGER MODELS...THEY SHOW QUITE A BIT

MORE COOLING AFTER LOW PRESSURE SYSTEM PASSES BY. GIVEN MOST AREAS

WILL HAVE SNOW COVER WILL LOWER HPC TEMPERATURES A LITTLE AROUND

WEDNESDAY. BUT NOT QUITE AS COLD AS MEX MOS.

WEAK HIGH PRESSURE WILL DOMINATE OUR WEATHER DAY 6 AND DAY 7 AND

WILL KEEP GRIDS DRY FOR NOW.

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when the quad cities are this meh about an event you have to wonder

FRIDAY NIGHT THROUGH THURSDAY...MINOR CHANGES MADE WITH TIMING OF

A FEW PERIODS OF LIGHT SNOW SUNDAY AND MONDAY THE MOST SIGNIFICANT.

MOST LOCATIONS TO PICK UP ROUGHLY A COUPLE OF INCHES OF SNOW OVER

THIS 24-36 PLUS HOUR PERIOD...NOT ENOUGH FOR AN ADVISORY.

OTHERWISE...OCCASIONAL RISK OF FLURRIES AND GENERALLY BELOW NORMAL

TEMPS WITH LIGHT TO OCCASIONALLY MODERATE WINDS. HIGHS MAINLY IN THE

TEENS AND 20S. MINS TO RANGE FROM THE TEENS TO NEAR 20 DEGREES WITH

CLOUDS TO WELL BELOW ZERO IN FAIR SKIES...LIGHT WINDS. ..NICHOLS..

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H.M. thoughts today on this storm.

2. A more significant snow event may develop Sunday and Monday from Illinois into PA/NY as a storm gathers strength across the South. The warm front will set up along the Ohio River, and just north of that front, there will be a band of moderate to heavy snow. As I always say, watch where the thunderstorms develop and move north over the warm front, and that's where the heaviest snows will occur. Right now, that areas looks like from Indy to Columbus.

http://www.accuweather.com/blogs/meteomadness/story/44343/swath-of-snow-from-the-plains-to-the-northeast.asp

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when the quad cities are this meh about an event you have to wonder

Kinda makes sense IF they are thinking this misses them to the east for the most part?

I do admit i would like to see one consolidated low vs say.. The crap the euro showed.

Here is GRR take on it.

THE MODELS CONTINUE TO INDICATE A MERGE OF THE NORTHERN AND SOUTHERN

STREAMS THAT PRODUCES LOW PRESSURE OVER THE CENTRAL PLAINS BY

MONDAY. WE MAY BEGIN TO SEE ANOTHER ROUND OF SNOW WITH THIS SYSTEM

STARTING MONDAY AFTERNOON ACROSS SOUTHERN LOWER...SPREADING ACROSS

ALL OF THE CWA MONDAY NIGHT INTO TUESDAY. THERE ARE SOME MODEL

DIFFERENCES BUT THE GENERAL INDICATION IS THAT THE SURFACE LOW WILL

PASS SOMEWHERE NEAR TOL WHICH IS AN IDEAL PATH FOR HEAVY SNOWS

ACROSS THE GRR CWA. THIS ONE OBVIOUSLY BEARS WATCHING AS THE SNOW

APPEARS TO LINGER WELL INTO TUESDAY.

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ILN

AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE WILMINGTON OH

430 PM EST THU JAN 13 2011

.LONG TERM /SUNDAY THROUGH THURSDAY/...

WENT CLOSER TO ECMWF WHICH HAS BEEN CONSISTENT OVER THE LAST FEW

RUNS. EXPECT HIGH PRESSURE AND DRY WEATHER ON SUNDAY. THERE WILL BE

A CHANCE OF SNOW MIXING WITH RAIN IN THE SOUTH ON MONDAY AS MOISTURE

STARTS TO STREAM UP AHEAD OF LOW PRESSURE TO THE WEST. THE CHANCE OF

SNOW WILL CONTINUE ON TUESDAY AS THE LOW PROGRESSES EAST ACROSS THE

AREA. THE SNOW MAY MIX WITH OR CHANGE TO RAIN AS FAR NORTH AS DAYTON

AND COLUMBUS. SNOW SHOWERS COULD LINGER INTO WEDNESDAY BEHIND THE

LOW. HIGH PRESSURE AND DRY CONDITIONS ARE ANTICIPATED FOR NEXT

THURSDAY.

GENERALLY WENT AT OR BELOW MEX GUIDANCE WITH HIGHS IN THE 20S AND

30S AND LOWS IN THE TEENS AND 20S. BIGGEST VARIANCE FROM GUIDANCE IS

ON WEDNESDAY WHEN IT SHOULD BE COLDER THAN MODELS INDICATE IN COLD

ADVECTION BEHIND THE LOW.

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Kinda makes sense IF they are thinking this misses them to the east for the most part?

I do admit i would like to see one consolidated low vs say.. The crap the euro showed.

Here is GRR take on it.

Sure, that office always seems to sniff out big ones that's all. For an event with people as far north as michigan worrying about rain, they don't sound impressed.

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Not a horrible write up. I think we need to clean it out and what I mean by that is getting these little clippers out of the way. No model has a good handle on the track and strength of the storm for next weekIts very wishy washy right now.

That's why i think Henry's thought that i posted is interesting. No model shows his scenerio so he seems to be going against them attm.

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AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE ST LOUIS MO

336 PM CST THU JAN 13 2011

.DISCUSSION...

/325 PM CST THU JAN 13 2011/

MID-HI LEVEL CLOUDS DROPPING SEWD THROUGH MO IL AHEAD OF A NW FLOW

SHORTWAVE TROUGH CENTERED OVER SWRN WI. ANY MEASUREABLE PRECIPITATION

SHOULD REMAIN NE OF THE CWA TGT...ALTHOUGH COULD NOT RULE OUT A

FEW FLURRIES. LOW TEMPERATURES TGT WILL NOT BE AS COLD AS LAST

NIGHT...BUT THEY WILL STILL BE BELOW NORMAL. WILL GO ON THE COLD

SIDE OF MOS TEMPERATURE GUIDANCE DUE TO THE SNOW COVER...AND SINCE

MOS GUIDANCE FOR LAST NGTS MINS WAS A LITTLE TOO WARM. MORE

CLOUDS WILL DROP SEWD THROUGH THE AREA ON FRI AND FRI NGT AS A

STRONGER SHORTWAVE MOVES SEWD THROUGH THE NRN PLAINS AND INTO THE

GREAT LAKES REGION WITH LOW-MID LEVEL WAA AHEAD OF IT. THERE MAY

BE SOME FLURRIES OVER THE NRN PORTION OF THE CWA FRI AFTN AND NGT

WITH MEASURABLE SNOW AGAIN REMAINING N OF THE CWA. TEMPERATURES

SHOULD MAKE IT UP TO THE FREEZING MARK FRI AFTN MAINLY S OF I-70.

A WEAKENING CDFNT WILL DROP SWD THROUGH THE CWA ON SAT...WITH A

CHANCE OF FLURRIES OR SPRINKLES MAINLY OVER THE ERN PORTION OF

THE CWA. COOLER TEMPERATURES EXPECTED SAT NGT BEHIND THE CDFNT...

ALTHOUGH THERE IS QUITE A BIT OF MODEL DISCREPENCY WITH AMOUNT OF

COOLING WITH THE GFS MOS MUCH COOLER FOR SAT NGT THAN THE NAM MOS.

AT THIS TIME WILL LEAN TOWARD THE COOLER GUIDANCE. THE GFS AND NAM

MODELS ARE NOW GENERATING A BAND OF LIGHT SNOW ACROSS THE NRN

PORTION OF THE CWA ON SUN ASSOCIATED WITH LOW-MID LEVEL WAA OVER

THE WEAK FRONT WHICH THEY FORECAST TO BECOME STATIONARY OVER

CNTRL MO. THE ECMWF MODEL HAS A STRONGER SFC RIDGE FOR SAT NGT WHICH

DRIVES THE CDFNT FURTHER SWD AND HENCE KEEPS THE PRECIPITATION S OF

THE CWA ON SUN. FOR NOW WILL JUST INCLUDE CHANCE POPS ON SUN.

ALTHOUGH THERE ARE STILL PLENTY OF MODEL DIFFERENCES FOR MON

THROUGH TUE THEY ALL SEEM TO GENERATE PRECIPITATION ACROSS THE CWA

MAINLY MON AFTN AND NGT. THERE ARE DIFFERENCES THOUGH WITH THE

STRENGTH OF THE MID-UPPER LEVEL TROUGH AND THE INTENSITY AND TRACK

OF THE ASSOCIATED SFC LOW WHICH WILL MOVE THROUGH OUR AREA. THERE

WILL BE THE POTENTIAL FOR ACCUMULATING SNOW ESPECIALLY OVER THE

NWRN PORTION OF THE CWA AS TEMPERATURES OVER THE SERN PORTION MAY

BE TOO WARM TO SUPPORT SNOW AT LEAST INITIALLY ON MON INTO MON

EVNG. MUCH COLDER CONDITIONS ARE EXPECTED FOR LATE MON NGT

THROUGH TUE NGT AS A STRONG SFC RIDGE BUILDS SEWD THROUGH MO IL

BEHIND THE SFC LOW AND TRAILING CDFNT.

GKS

Once again, they are saying, we have some idea that it should be cold enough for winter precip, outside of that, lets pull scenarios out of a hat.

cleary the big picture id modeled well, but small details like vort placement and strength is crazy.

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LOT

THIRD DISTURBANCE TO BE MOVING FROM THE PLAINS TO THE MS VALLEY

SUN NIGHT...GRADUALLY PUSHING E OF THE LOCAL AREA BY LATE TUE-TUE

NIGHT. DURATION AND AGAIN FAIRLY STRONG WAA AND ASSOCIATED UVV MAY

END UP PRODUCING A FEW MORE INCHES. WITH SFC LOW TRACK PREDICTED

TO BE ACROSS CENTRAL IL AND NRN IND THIS WILL GIVE THE IL SIDE OF

THE LAKE A THREAT OF LES TIL LOW MOVES FURTHER E AND LOW LEVEL

WINDS BACK SHIFTING LES THREAT ACROSS NW IND AND INTO N CENTRAL

IND AND SW LOWER MI BY LATER TUE MORNING.

either way I love the pattern were STILL in, even though we haven't had a big event here yet, dont mind these 2-4" events more often.

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If this thing can get its act together things are gonna get very cold. Madison is projected to get down to -12 °F in the wake of this thing on the 12z GFS, even though it's just a mess. I bet sub -20 °F temps are easily possible if it's more coherent, maybe temps around -30 °F if it bombs. But that likely won't happen of course.

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