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Feb 9th-? MW/GL/OV Threat


SpartyOn

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Canuck makes a good point with the S/w in the prairies

regardless, im looking at the 12z euro and dont see anything other than the PV determining how it wants to interact with this wave that will result in the outcome

the flow is moving along, there is no block of significance, the pac ridge is well west, and the spacing on the euro is better.....note the energy digs further west and its quite a bit slower than the GFS.

interestingly by day 5, you can really see how this could cut west if the S/w as Cancuk pointed out was still there.

this is also a day 6-7 event so thats way out there. the PV is often not well handled at even short ranges IMO, nevermind day 6-7.

again, if i was in the eastern MW at least and the OV for sure and of course the east coast potentially too.........this is a significant threat for a potential major storm pending PV interaction.

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took the words out of my mouth! Let's hope this is this storm's "burp" run.

We'll see. Hard to have a lot of confidence in anything given the model performance that we're seeing with the next couple of smaller events. A little off topic but for the event tomorrow, check out the 12z GFS compared to the 00z run.

12z

gfs_500_030s.gif

00z

gfs_500_042s.gif

Not an insignificant difference for being this close in and it's a trend that is showing up on other 12z solutions.

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We'll see. Hard to have a lot of confidence in anything given the model performance that we're seeing with the next couple of smaller events. A little off topic but for the event tomorrow, check out the 12z GFS compared to the 00z run.

12z

gfs_500_030s.gif

00z

gfs_500_042s.gif

Not an insignificant difference for being this close in and it's a trend that is showing up on other 12z solutions.

That is the difference from nothing to 2-4 tonight.

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Nice IND AFD discussion, talking about totals and model concerns, for all 3 storms:

UPDATE

THE SYNOPSIS...NEAR TERM...SHORT TERM AND LONG TERM SECTIONS HAVE

BEEN UPDATED BELOW

SYNOPSIS

SEVERAL SYSTEMS WILL BRING SNOW CHANCES TO CENTRAL INDIANA OVER THE

NEXT SEVEN DAYS. FIRST...AN UPPER LEVEL SYSTEM NEAR THE RED RIVER

WILL LIFT NORTHEAST ACROSS THE OHIO VALLEY ON SATURDAY WHICH COULD

BRING SOME LIGHT SNOW ACCUMULATION TO CENTRAL INDIANA TONIGHT AND

SATURDAY. SECOND...ANOTHER SYSTEM COMING OUT OF WESTERN CANADA MAY

BRING ACCUMULATION SNOW SUNDAY THROUGH MONDAY NIGHT AND...FINALLY

YET ANOTHER SYSTEM COULD BRING ACCUMULATION SNOW TUESDAY NIGHT

THROUGH WEDNESDAY NIGHT.

NEAR TERM /TONIGHT THROUGH SATURDAY NIGHT/

MODELS ARE HAVING TIMING DIFFICULTIES WITH COMPACY UPPER LOW NEAR

THE RED RIVER EARLY THIS AFTERNOON WITH THE 00Z ECMWF THE FASTEST

AND 12Z NAM THE SLOWEST TO MOVE IT ACROSS THE OHIO VALLEY ON

SATURDAY. STILL...ALL MODELS ARE NOT CONSISTANT ON A FURTHER NORTH

PLACEMENT ON QPF AND SIMILAR IN AMOUNTS...ALTHOUGH GFS IS A BIT

HIGHER AND RULED OUT BASED ON SPEED OF SYSTEM AND BEING AN OUTLIER.

WILL GO WITH OTHER MODEL CONSENSUS WITH AROUND 2 INCHES ACROSS OUR

SOUTHEAST TAPPERING TO AROUND AN INCH IN THE INDIANAPOLIS AREA AND

LESSER AMOUNTS NORTHEAST. SO...WILL RAMP UP POPS ESPECIALLY

OVERNIGHT AND SATURDAY MORNING AND FOLLOW MOST CLOSELY THE MIDDLE OF

THE ROAD 12Z GFS AND 00Z GFS ENSEMBLE MEAN WHICH TAKE THE UPPER LOW

TO WESTERN KENTUCKY BY 18Z SATURDAY. ALSO...WILL NEED TO HOLD ON TO

CHANCE POPS EAST SATURDAY AFTERNOON. MODELS ALL DRYING THINGS OUT

SATURDAY NIGHT AS A SURFACE RIDGE MOVES ACROSS. STILL...MODEL TIME

SECTIONS AND LOW LEVEL RH PROGS SUGGEST CLOUDS WILL HANG AROUND.

WILL ISSUE A SPECIAL WEATHER STATEMENT TO HIGHLIGHT THE SNOW AND

ALSO POTENTIAL PROBLEMS WITH ANY LEFTOVER ICE UNDERNEATH.

MOS TEMPERATURES PRETTY CLOSE AND APPEAR REASONABLE WITH ONLY SMALL

DROPS TONIGHT IN THE INCREASING CLOUD COVER AND MODEST RISES

TOMORROW.

SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/

MAIN CHALLENGE WILL BE TIMING AND POPS ALONG WITH PRECIPITATION TO

THE SHORT TERM AS A CANADIAN SYSTEM DIGS AS IT MOVES ACROSS THE OHIO

VALLEY ON MONDAY.

THE GFS IS THE OUTLIER HERE BEING TOO FAST TO BRING QPF

IN...BRINGING IT IN OVERNIGHT SATURDAY NIGHT...WHILE...THE 12Z NAM

AND 00Z ECMWF SEEM TOO SLOW NOT BRINGING QPF INTO THE WEST UNTIL

AFTER 18Z SUNDAY. WITH MODELS NOT COMING TOGETHER VERY WELL...PREFER

MIDDLE OF THE ROAD 09Z SREF AND 12Z GEM WHICH BRING PRECIP TO THE

WESTERN INDIANA BY 18Z AND ACROSS ALL OF CENTRAL INDIANA BY 00Z

MONDAY. SO...WENT WITH SMALL MORNING POPS INCREASING DURING THE

AFTERNOON FROM NORTHWEST TO SOUTHEAST AND GOOD CHANCE POPS SUNNDAY

NIGHT AND MONDAY AS THE SYSTEM GETS CLOSER WITH LOW POPS MONDAY

NIGHT IN THE WAKE OF THE SYSTEM. MOS SUGGEST SOUTHERN THIRD OF

CENTRAL INDIANA COULD SEE A RAIN AND SNOW MIX THROUGH SUNDAY EVENING

WITH ALL SNOW ELSEWHERE AND AFTER SUNDAY EVENING. MODELS ARE ALL

SPITTING OUT 2 TO 4 INCHES FOR THIS EVENT. TOO EARLY TO GO LIKELY

BUT WILL MENTION SNOW ACCUMULATION POTENTIAL IN THE HAZARDOUS

WEATHER OUTLOOK.

THE NAM MOS LOOKS TOO WARM THINGS UP A LITTLE TOO QUICKLY ON

SUNDAY...WENT WITH COOLER GFS.

LONG TERM /TUESDAY THROUGH THURSDAY/

LONG RANGE MODELS ARE HAVING SOME TROUBLES REGARDING

TIMING...STRENGTH AND RESULTANT QPF FIELDS ASSOCIATED WITH

STRENGHENING GULF AND THEN EAST COAST SYSTEM. HOWEVER...THE GEM AND

ECMWF WERE MUCH CLOSER AND STRONGER AND BOTH DRAW DEEPER MOISTURE

WELL NORTH OF THE OHIO RIVER...WHILE THE OPERATIONAL GFS KEEPS IT

SOUTH OF THE RIVER. WITH ECMWF TYPICALLY THE BETTER EXTENDED MODEL

THAN THE GFS AND WITH SUPPORT FROM THE GEM...WILL STICK CLOSER TO A

ECMWF AND GEM BLEND. BOTH OF THESE MODELS WERE SHOWING STRONG

ISENTROPIC LIFT AND RESULTANT 8 PLUS INCH SNOW AMOUNTS ACROSS THE

HEART OF CENTRAL INDIANA...WHILE THE GFS HAD SIMILAR AMOUNTS BUT

WELL SOUTH ACROSS THE TENNESSEE VALLEY. SO FOR NOW...WILL BUMP UP

POPS TUESDAY NIGHT THROUGH WEDNESDAY NIGHT AND ADD MENTION OF

POSSIBLE ACCUMULATING SNOWS IN THE HAZARDOUS WEATHER OUTLOOK.

HOWEVER...TOO EARLY TO THROW SIGNIFICANT SNOW IN THE SNOW AMOUNT

GRIDDS.

TEMPERATURES ARE A CONCERN WITH ARCTIC AIRMASS IN PLACE.

STILL...THINK THE HPC OVERNIGHT LOWS ARE TOO COLD AT TIMES WITH LOTS

OF CLOUDS EXPECTED TO BE IN PLACE. DAYTIME HIGHS LOOK BETTER.

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