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1/1-1/4 Lake Effect Snow Outbreak


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KALB

THIS WILL SIGNAL A PATTERN CHANGE FOR THE REGION AS ARCTIC AIR

FILTERS SOUTHWARD FOR MOST OF NEXT WEEK AS RIDGE AXIS BUILDS ACROSS

THE WESTERN CONUS. NCEP MODEL SUITE ALONG WITH INTERNATIONAL GLOBAL

MODELS ARE IN RATHER GOOD AGREEMENT THAT THE COLD ADVECTION WILL

START SUNDAY NIGHT AND CONTINUE INTO TUESDAY AS WE SETTLE DOWN THOSE

850MB TEMPS INTO THE SUB MINUS 20C. IN ADDITION...FLOW ALOFT WILL

REMAIN CYCLONIC AND RELATIVELY MOIST PROFILES TO KEEP THE CHANCE FOR

SNOW SHOWERS AND SOME SQUALLS DOWNWIND OF LAKE ONTARIO. RIDGE IS

EXPECTED TO REESTABLISH ITSELF FOR THE MID WEEK PERIOD. TOUGH TO

PIN DOWN WHO WILL RECEIVE ACCUMULATING SNOW...BUT THE BEST CHANCE

FOR THIS OCCUR FOR THE ENTIRE REGION APPEARS TO BE MONDAY NIGHT INTO

TUESDAY MORNING.

http://forecast.weather.gov/product.php?site=NWS&issuedby=ALY&product=AFD&format=CI&version=1&glossary=1&highlight=off

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KBGM

MONDAY NIGHT/WEDNESDAY...A REINFORCING SHOT...WITH THE TRUE ARCTIC AIR...

WILL MOVE IN MONDAY NIGHT AS A SECONDARY COLD FRONT MOVES THROUGH.

IN ADDITION TO DROPPING OUR TEMPS FARTHER...OUR WINDS WILL BECOME

MORE NORTHWESTERLY MONDAY NIGHT WHICH WILL LINE UP WITH 850 TEMPS

PLUNGING TO -20C/-23C TO PRODUCE A WIDE SPRAY OF LAKE EFFECT OFF

BOTH LAKE ONTARIO AND THE FINGER LAKES. THE COMBINATION OF WIND

AND COLD AIR WILL LIKELY PRODUCE WIND CHILL VALUES NEAR OR BELOW

ZERO STARTING EARLY TUESDAY MORNING AND LASTING INTO WEDNESDAY.

IN ADDITION TO LOW WIND CHILL VALUES...MOST OF OUR AREA WILL SEE

LAKE EFFECT SNOW RIGHT THROUGH WEDNESDAY. AS ONE MIGHT THINK...ONE

LIMITING FACTOR WILL BE THE AMOUNT OF DRY AIR IN PLACE (VERY COLD

AIR)...ALONG WITH A SHORTER FETCH (NORTHWEST FLOW VS. WESTERLY

FLOW). WITH THAT SAID WITH SUCH COLD AIR IN PLACE...AND HELP FROM

THE FINGER LAKES...A PROLONGED PERIOD OF LAKE EFFECT SNOWS CAN BE

EXPECTED ACROSS MUCH OF CNY...THE SOUTHERN TIER OF NY...INTO THE

NORTHERN TIER OF PA. WITH TEMPS THIS COLD...IT WON`T TAKE MUCH QPF

TO GET A DECENT AMOUNT OF FLUFF.

http://forecast.weather.gov/product.php?site=NWS&issuedby=BGM&product=AFD&format=CI&version=1&glossary=1&highlight=off

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KBUF

TEMPERATURES WILL QUICKLY FALL BELOW FREEZING SUNDAY NIGHT...AS

850MB TEMPS FALL AS WELL. EVENTUALLY TEMPERATURES ALOFT WILL RESULT

IN MODEST LEVELS OF LAKE INDUCED CAPE ON SUNDAY NIGHT...AS STRONG

POST FRONTAL WINDS SHIFT FROM SW TO W. THIS SHOULD RESULT IN THE

ONSET OF LAKE EFFECT SNOW SHOWERS E OF THE LAKES SUNDAY NIGHT.

FOR MONDAY AND TUESDAY...TEMPERATURES AT THE SURFACE AND ALOFT WILL

GROW PROGRESSIVELY COLDER. GIVEN THE TIMEFRAME...IT WILL BE

DIFFICULT TO PIN DOWN EXACT WIND DIRECTION...BUT THE MEAN FLOW

SHOULD GENERALLY BE NORTHWESTERLY. THE CORE OF THE COLDEST AIR WILL

REACH WESTERN NEW YORK TUESDAY MORNING...WHEN THE 12Z GFS/EURO/GGEM

ALL FORECAST 850 MB TEMPERATURES TO DROP TO -20 TO -24C ACROSS

WESTERN NEW YORK. OUTSIDE OF THE BITTERLY COLD SURFACE

TEMPERATURES...WHICH WILL FEEL EVEN COLDER DUE TO WIND CHILL...THIS

ALSO IS LIKELY TO CAUSE THE MOST SIGNIFICANT LAKE EFFECT EVENT SO

FAR THIS SEASON.

WHILE THE WIND DIRECTION IS NOT THE MOST FAVORABLE IN TERMS OF

FETCH...THE SHEAR INSTABILITY WILL LIKELY OUTWEIGH THIS. THIS WILL

RESULT IN A PROLONGED PERIOD OF SIGNIFICANT LAKE INDUCED CAPE.

MEANWHILE...THE UPPER TROF WILL REMAIN ALOFT...WHICH WILL MAINTAIN

MOISTURE...AND PRESENT THE POSSIBILITY FOR EMBEDDED SHORTWAVE WHICH

ARE IMPOSSIBLE TO TIME THIS FAR OUT. SNOW SHOULD BE VERY

FLUFFY...WITH 30:1 RATIOS A GOOD POSSIBILITY. THIS SAID...NOT ALL OF

WESTERN NEW YORK WILL RECEIVE HEAVY SNOW FROM THIS PATTERN.

TYPICALLY...SE OF LAKE ONTARIO (WAYNE/OSWEGO/CAYUGA) AND WESTERN

PORTIONS OF THE SOUTHERN TIER WILL RECEIVE THE MOST SNOW IN THIS

PATTERN. HOWEVER...THIS ALSO BEARS WATCHING ALONG THE ENTIRE LAKE

ONTARIO SOUTHERN SHORES...INCLUDING NIAGARA...ORLEANS...AND MONROE

COUNTIES. BASED ON THIS...WILL MAINTAIN A MENTION IN THE HWO

FOR THE POTENTIAL FOR SIGNIFICANT LAKE SNOWS...AND FOR BITTERLY COLD

WIND CHILLS.

BOTH GFS/EUROPEAN BUILD HIGH PRESSURE ACROSS THE REGION TUESDAY

NIGHT...WITH WINDS SHIFTING TO THE SOUTH BY DAYBREAK WEDNESDAY. IF

THIS PANS OUT...THIS SHOULD END LAKE SNOWS TUESDAY NIGHT...AS

OVERNIGHT LOWS SHOULD DROP INTO THE SINGLE DIGITS OR COLDER ACROSS

MUCH OF WESTERN NEW YORK. ANOTHER (BUT LESS SIGNIFICANT) SHORTWAVE

WILL APPROACH WEDNESDAY NIGHT AND THURSDAY...WHICH MAY BRING A SW

FLOW AHEAD OF IT. WILL CARRY CHANCE POPS NE OF THE LAKES FOR

THIS...AS TEMPERATURES MAY BE COLD ENOUGH FOR LAKE SNOWS AHEAD OF

THIS. THIS SHORTWAVE WILL USHER IN WARMER TEMPERATURES FOR

THURSDAY...WITH NEAR NORMAL HIGHS EXPECTED.

http://forecast.weather.gov/product.php?site=NWS&issuedby=BUF&product=AFD&format=CI&version=1&glossary=1&highlight=off

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Sounds like more of a threat south of the Mohawk Valley if the winds are true northwest. The far western Mohawk Valley could still be good, but then nw winds tends spray it across the Susquehanna region, Cooperstown, the western Catskills, etc.

Hopefully we get some period with a more WNW trajectory before it all just settles south for the duration.

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Enjoy the five days of cold and hopefully some LES... Because after that Pacific air takes over and the CONUS torches yet again. Then we'll get a nice rainstorm followed by more stormless wx cold probably.

NAM looks okay for the metro area but not great...considerably better than the gfs, though.

We can hope that the NAM is keying on the lake-aggregate trough feature causing the winds to stay backed over the lower lakes.

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NAM looks okay for the metro area but not great...considerably better than the gfs, though.

We can hope that the NAM is keying on the lake-aggregate trough feature causing the winds to stay backed over the lower lakes.

Thanks! I know a slight shift in any wind direction can have a huge impact on where the band sets up and it has to be difficult if not impossible to pinpoint this beyond a day or two. We can always hope for a few shortwaves to swing there way through to help us back the winds as well. Also, I know the NWS discussions have mentioned this several times...The warm lakes have a tendency to cause the bands to lift farther north then originally thought in the beginning part of the year when lakes are really warm, that might help as well this time around.

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Enjoy the five days of cold and hopefully some LES... Because after that Pacific air takes over and the CONUS torches yet again. Then we'll get a nice rainstorm followed by more stormless wx cold probably.

is the euro still showing that torch after next week's cold?

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Sounds like more of a threat south of the Mohawk Valley if the winds are true northwest. The far western Mohawk Valley could still be good, but then nw winds tends spray it across the Susquehanna region, Cooperstown, the western Catskills, etc.

Hopefully we get some period with a more WNW trajectory before it all just settles south for the duration.

Yeah 290 degrees seems like the right angle for us in Otsego County.

I would like a bunch of fluff but the thought of it torching off a few days later is just too painful.

What a depressing winter!

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12 NAM looks great for South towns for nearly 12+ hours under the LES band! 3rd run in a row showing that! :snowing:

It brings it up near the Metro as well for a short time.Last years December 1-3 event was not supposed to make it as far north as it did, some 5-10 more north then was predicted. Something to think about with this one.

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12 NAM looks great for South towns for nearly 12+ hours under the LES band! 3rd run in a row showing that! :snowing:

It brings it up near the Metro as well for a short time.Last years December 1-3 event was not supposed to make it as far north as it did, some 5-10 more north then was predicted. Something to think about with this one.

yeah the 06z and 12z gfs and nam trends have been favorable for BUF and the southtowns. We need the superior Euro to come around though.

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Don Paul just posted this on the WIVB Blog.

"Actually, we’ll put Wednesday aside for now and focus on the nearterm. The NAM shows a favorable bndry lyr flow going into Sunday evening for potential significant LES near the metro area. Moisture is a little limited, so there’s that question. But if the band organizes with decent convergence despite the strong winds (probably Advisory criteria), we could see whiteouts Sunday night."

Whats BufKIT has to say about the LES? Isn't the the preferred model developed internally by the Buffalo NWS Tom Niziol who is now going to be the winter weather expert for the weather channel?

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Don Paul just posted this on the WIVB Blog.

"Actually, we’ll put Wednesday aside for now and focus on the nearterm. The NAM shows a favorable bndry lyr flow going into Sunday evening for potential significant LES near the metro area. Moisture is a little limited, so there’s that question. But if the band organizes with decent convergence despite the strong winds (probably Advisory criteria), we could see whiteouts Sunday night."

Whats BufKIT has to say about the LES? Isn't the the preferred model developed internally by the Buffalo NWS Tom Niziol who is now going to be the winter weather expert for the weather channel?

what??

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what??

"BIG NEWS about our M.I.C. Tom Niziol. Tom is taking early retirement from a 30 year career with the NWS on the 31st to join The Weather Channel as their new Winter Weather Specialist. TWC could not possibly have made a better choice! I was proud and privileged that my 28 year buddy asked me to be a reference, but I think Tom already had the job nailed when a TWC exec and I chatted about him."

Congratulations to Tom!

Going to be seeing him on TV quite often!!! =)

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"BIG NEWS about our M.I.C. Tom Niziol. Tom is taking early retirement from a 30 year career with the NWS on the 31st to join The Weather Channel as their new Winter Weather Specialist. TWC could not possibly have made a better choice! I was proud and privileged that my 28 year buddy asked me to be a reference, but I think Tom already had the job nailed when a TWC exec and I chatted about him."

Congratulations to Tom!

Going to be seeing him on TV quite often!!! =)

where did you find that?

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"BIG NEWS about our M.I.C. Tom Niziol. Tom is taking early retirement from a 30 year career with the NWS on the 31st to join The Weather Channel as their new Winter Weather Specialist. TWC could not possibly have made a better choice! I was proud and privileged that my 28 year buddy asked me to be a reference, but I think Tom already had the job nailed when a TWC exec and I chatted about him."

Congratulations to Tom!

Going to be seeing him on TV quite often!!! =)

Always liked Tom, he helped me out a bunch on a poster I did regarding lightning in lake effect snow bands while I was in Grad School. And let me come hang around the office a few times when I was job hunting.

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Always liked Tom, he helped me out a bunch on a poster I did regarding lightning in lake effect snow bands while I was in Grad School. And let me come hang around the office a few times when I was job hunting.

He gave me several tours through the NWS offices, he was an amazing guy. That was literally the best experience of my life! He was so detailed in explaining all my questions as well as patient. I learned more that day about the weather then the previous 10 years before!

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