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Late Weekend Storm Threat


IsentropicLift

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We have heard this tune many many times. Model ends up verifying for the most part.

Bad solutions always seem to verify...you never see a rainstorm go "out to sea."

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Bad solutions always seem to verify...you never see a rainstorm go "out to sea."

Good point, but It's because of hopes and expectations we call them "bad" or "good". The weather is what it is and will do what it does regardless of human thought or emotion. We all know that obviously, but it is worth stating to hone in on the relevance of our filtering minds. I'm sure rainstorms are a miss at times, but people hardly remember because they do not care. Emotional weight leads to greater cognitive saliency.

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At least they will get a jump on salting and sanding for this event since it is well advertised.

The surprise Sunday morning freezing rain event a few weeks back didn't leave any time

to treat the roads ahead of time. But there will still be untreated areas that lead to

dangerous walking and driving.

 

https://www.youtube.com/watch?v=NjqicQdnqDk

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Good point, but It's because of hopes and expectations we call them "bad" or "good". The weather is what it is and will do what it does regardless of human thought or emotion. We all know that obviously, but it is worth stating to hone in on the relevance of our filtering minds. I'm sure rainstorms are a miss at times, but people hardly remember because they do not care. Emotional weight leads to greater cognitive saliency.

This. Rainstorms miss as well.
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At least they will get a jump on salting and sanding for this event since it is well advertised.

The surprise Sunday morning freezing rain event a few weeks back didn't leave any time

to treat the roads ahead of time. But there will still be untreated areas that lead to

dangerous walking and driving.

 

https://www.youtube.com/watch?v=NjqicQdnqDk

 

There's already a ton of residual salt on the roads & temps are much warmer going into this event so wouldn't expect anything close to that kind of disruption this time around.

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12z RGEM, now in its deadly range, is colder, keeps possibility for a big time winter storm...still snowing at 48 hours...much freezing rain & sleet (not shown)...like Lee Van Cleef once said, "I knew that ____ was alive."

post-747-0-93438100-1423409609_thumb.gif

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either way its going to be a horrible commute...the euro and its .25 qpf is going to be underdone like it is always is with these situations

 

Not looking at the verification scores; ECWMF was one of the worst this winter...it was not good on most of the big events...unreal on the 1/26/15 one...even messed up December...

 

 

I remember they did an "upgrade" to it a couple years ago...and it was never the same again...if it ain't broke...

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12z RGEM, now in its deadly range, is colder, keeps possibility for a big time winter storm...still snowing at 48 hours...much freezing rain & sleet (not shown)...like Lee Van Cleef once said, "I knew that ____ was alive."

 

I just looked through the past couple runs, and it's been ticking slightly cooler for the past 3 runs. This is the least amount of plain rain I've seen yet from this model on LI

 

post-4973-0-66372000-1423410901_thumb.gi

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I just looked through the past couple runs, and it's been ticking slightly cooler for the past 3 runs. This is the least amount of plain rain I've seen yet from this model on LI

 

 

 

Its interesting to see the heavier green area on the snow map edge down to the Port Jeff area on the latest snow map...it was in the Sound or over the CT coast in previous runs...its getting there.

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There's already a ton of residual salt on the roads & temps are much warmer going into this event so wouldn't expect anything close to that kind of disruption this time around.

Residual salt will be largely washed away by the initial rain and antecedent temps are way overrated.  If it's below 32F, ground temps will reach equilibrium with the air temps pretty quickly (less than an hour), especially at night time, with no solar warming of darker, paved surfaces, and freezing rain will then accrete on all surfaces. 

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Update from Upton at 1025.

000

FXUS61 KOKX 081525

AFDOKX

AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE NEW YORK NY

1025 AM EST SUN FEB 8 2015

.SYNOPSIS...

-- Changed Discussion --

A STATIONARY FRONT IS JUST SOUTH OF THE REGION TODAY. WEAK LOW

PRESSURE FROM THE MIDWEST WILL SLOWLY MOVE EAST ALONG THE FRONT

TODAY AND PASS SOUTH OF THE REGION MONDAY INTO TUESDAY. HIGH

PRESSURE BUILDS IN TUESDAY NIGHT AND WEDNESDAY. ANOTHER LOW AND

ASSOCIATED COLD FRONT WILL APPROACH WEDNESDAY NIGHT...AND MOVE

THROUGH ON THURSDAY. HIGH PRESSURE AND THE COLDEST AIR OF THE

WINTER SEASON THUS FAR WILL MOVE IN LATER THIS WEEK.

-- End Changed Discussion --

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...

-- Changed Discussion --

BACKDOOR COLD FRONT HAS BECOME NEARLY STATIONARY JUST SOUTH OF THE

TRI-STATE AREA. HIGHS HAVE LIKELY BEEN REACHED TODAY WITH TEMPS

HOLDING NEARLY STEADY OR SLOWLY FALLING THROUGH THE DAY WITH AN

E/NE FLOW. SIMILAR TO 24H AGO THERE ARE RADAR RETURN ACROSS

EASTERN PA WORKING EAST THAT COULD RESULT IN SOME LIGHT PCPN THIS

AFT. MOST OF THIS THOUGH SEEMS TO BE DRYING OUT BEFORE REACHING

THE GROUND BASED ON OBS.

WEAK LIFT FROM OVERRUNNING WILL BE FOCUSED PRIMARILY NORTH OF THE

AREA. THUS...ONLY SLIGHT CHANCE POPS TODAY. A WINTRY MIX OF

FREEZING RAIN AND SNOW...WITH SOME SLEET WILL BE POSSIBLE WITH

PLAIN RAIN ALONG THE COAST AS THE FRONTAL BOUNDARY SLOWS OR STALLS

AND THE COLDER AIR DOES NOT YET FILTER TO LONG ISLAND.

-- End Changed Discussion --

&&

.SHORT TERM /6 PM THIS EVENING THROUGH MONDAY NIGHT/...

A THE FRONT AND COLDER AIR DRIFT FARTHER SOUTH THIS EVENING AND A

WAVE OF LOW PRESSURE MOVES ALONG THE BOUNDARY ALONG WITH THE UPPER

SHORTWAVE...PRECIPITATION WILL BECOME MORE LIKELY. THE PROFILES

SUPPORT A MIX OF MOSTLY FREEZING RAIN AND SNOW. INLAND THE

PRECIPITATION TRANSITIONS TO ALL SNOW EARLY MONDAY AND CONTINUES.

WHILE AT THE COAST MIXED PRECIPITATION CONTINUES. HAVE ISSUED

WINTER WEATHER ADVISORIES FOR THE ENTIRE CWA BEGINNING AT 05Z WITH

THE PRECIPITATION BECOMING MORE LIKELY. THE WINTER STORM WATCH IS

NO LONGER IN EFFECT. WILL BE A LONG DURATION EVENT FROM TODAY

THROUGH MONDAY NIGHT. SNOW TOTALS OF 5 TO 7 INCHES POSSIBLE

INLAND...MAINLY ACROSS THE EXTREME NORTHERN PORTION...SO NOT QUITE

REACHING THE 8 INCHES IN 24 HOURS FOR WARNING. ALSO ICE

ACCUMULATIONS WILL BE UNDER THE HALF INCH CRITERIA. ALONG THE

COAST THE MIX OF FREEZING RAIN AND SNOW CONTINUES. AS THE LOW

PULLS OUT LATE MONDAY NIGH THE PRECIPITATION TOWARD THE COAST WILL

TRANSITION TO SNOW BEFORE ENDING. TOTAL ICE AND SNOW

ACCUMULATIONS WILL BE ADVISORY LEVELS.

&&

.LONG TERM /TUESDAY THROUGH SATURDAY/...

-- Changed Discussion --

LIGHT WINTRY PRECIPITATION WILL BE EXITING THE EASTERN ZONES EARLY

TUESDAY MORNING...WITH CHANCE POPS. ONLY MINOR ADDITIONAL SNOW

AND/OR ICE ACCUMULATION EXPECTED. SO FOR NOW THE END TIME OF THE

ADVISORIES IS 11Z TUESDAY...OR THROUGH MONDAY NIGHT. IF THE LOW IS

SLOWER TO MOVE OUT...THE ADVISORIES FOR THE EASTERN ZONES MAY NEED

TO BE EXTENDED.

HIGH PRESSURE BUILDS BEHIND THE DEPARTING LOW THROUGH MID WEEK

WITH HIGH TEMPS RUNNING 5-8 DEGREES BELOW AVG.

NWP MODELS ARE IN CLOSE ENOUGH AGREEMENT ON THE IDEA OF ANOTHER NRN

STREAM SHORTWAVE SWINGING DOWN INTO THE MID ATLANTIC REGION AND THEN

PASSING OFF THE COAST ON FRI...WITH SFC CYCLOGENESIS JUST S OF LONG

ISLAND THU AFTERNOON AND RAPID INTENSIFICATION E OF NEW ENGLAND THU

NIGHT. HAVE ONLY LOW CHANCE POP FCST MAINLY FOR ERN CT/LONG

ISLAND...AND THIS MAY HAVE TO BE WATCHED WITH THE 12Z GFS SHOWING A

MORE ROBUST SYSTEM CLOSING OFF ALOFT RIGHT OVER THE AREA AND A

POTENTIAL FOR GREATER SNOWFALL. EXPECT THE COLDEST AIR OF THE

WINTER TO MOVE IN BEHIND THIS SYSTEM...WITH LOWS BOTH THU NIGHT

AND FRI NIGHT 0 TO 5 BELOW INLAND...AND IN THE LOWER SINGLE DIGITS

FOR NYC METRO AND LONG ISLAND...AND HIGHS ON FRI ONLY 10-15 NEAR

THE COAST AND IN THE SINGLE DIGITS WELL INLAND. SUSTAINED NW WINDS

10-15 MPH THU NIGHT IN COMBINATION WITH THESE TEMPS WILL LIKELY

LEAD TO WIND CHILLS 15 TO 25 BELOW ZERO LATE THU NIGHT INTO EARLY

FRI MORNING.

THIS FRIGID BLAST SHOULD BE SHORT LIVED...WITH A 10-DEGREE

MODERATION TAKING PLACE BY SAT...WITH HIGHS 20-25 WHICH IS STILL

WELL BELOW AVG. IT MAY WELL BE FOLLOWED BY ANOTHER FRIGID BLAST JUST

BEYOND THE FCST PERIOD.

-- End Changed Discussion --

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Residual salt will be largely washed away by the initial rain and antecedent temps are way overrated.  If it's below 32F, ground temps will reach equilibrium with the air temps pretty quickly (less than an hour), especially at night time, with no solar warming of darker, paved surfaces, and freezing rain will then accrete on all surfaces. 

most of the main roads will have no problem tomorrow morning ( except for untreated bridges )as the combo of residual salt left over warmth from the last couple of days and borderline temps with additional salt being put down  - the problem is with some less traveled side roads - sidewalks - steps and frozen windshields and doors  etc etc - wont be be as bad as last Monday morning although if it is icy in the AM instead of delayed openings for schools they might just shut down for the day because its going to get icier and snowier as the day wears on especially in the suburbs.......

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most of the main roads will have no problem tomorrow morning ( except for untreated bridges )as the combo of residual salt left over warmth from the last couple of days and borderline temps with additional salt being put down  - the problem is with some less traveled side roads - sidewalks - steps and frozen windshields and doors  etc etc - wont be be as bad as last Monday morning although if it is icy in the AM instead of delayed openings for schools they might just shut down for the day because its going to get icier and snowier as the day wears on especially in the suburbs.......

warmth? What warmth? Hasn't been to freezing except today. Ground is frozen a foot thick in places depending on your location of course
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