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March 23-24 System


RyanDe680

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Out to 54 hours on the EURO, everything looks similar so far in terms of frontal passage timing.

 

Actually a touch faster here. Around 12z Tues for Milwaukee, couple hours later here.

 

Low over OK panhandle at 60 hours.

72 hours just south of Topeka.

 

Front is into Lincoln at 72 hours.

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Going to be another big run.

 

Low travels along I-70 for the most part.

 

The f-gen band is really strong across southern most WI and southern MI.

 

Freezing line along I-88 at 78 hours and then straight towards Detroit.

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Central Iowa to Kenosha, Racine and Milwaukee are in the heaviest corridor so far. Out to 90 hours.

Through Blackrock/Muskegon.

 

post-7-0-19538800-1458541622.png

 

Looks more realistic compared to the 12z version.  Already cut significant snow amounts south of the main swath where we'll be locked in under a warm layer that will prevent much, if any snowfall.  Cedar Rapids will likely be pretty much shut out per usual, with a foot or more of snow 30-60 miles north of there.  1-2" of slop call there may actually be a bit too aggressive.  Other than that my first calls from earlier looking spot on.  

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IWX says reason for poop model forecasts right now is horrible sampling so far, GRR issues WSW for some of their counties:

 

MODELS IN AGREEMENT SYNOPTICALLY WITH LEE SIDE CYCLOGENESIS TUESDAY
AS PACIFIC ENERGY CURRENTLY NEARING THE WEST COAST MOVES INLAND AND
ACROSS THE ROCKIES. WEAK NORTHERN STREAM SHORT WAVE ENERGY ACROSS
CANADA TODAY IS EXPECTED TO DROP A COLD FRONT SOUTH ACROSS MICHIGAN
BY TUESDAY. THIS BOUNDARY WILL BECOME NEARLY STATIONARY ANYWHERE
FROM LOWER MICHIGAN TO FAR NORTHERN INDIANA AS IT BECOMES PARALLEL
TO MID LEVEL FLOW. LOCATION OF THIS FRONT WILL BE CRITICAL TO
FORECAST GIVEN THE IMPRESSIVE AND TIGHT THERMAL GRADIENT. PARENT
ENERGY REMAINS OFF THE WEST COAST AND STILL POORLY SAMPLED BY UA
NETWORK. MODELS HAVING DIFFICULT TIME WITH WHERE FRONT WILL BE
LOCATED AND THE TRACK OF DEEPENING SURFACE LOW THAT LIFTS OUT OF THE
PLAINS WEDNESDAY INTO THURSDAY. ECMWF HAS CONSISTENTLY BEEN ON THE
SOUTH SIDE OF GUIDANCE WHILE THE GFS HAS REMAINED TO THE NORTH AND
00Z RUNS WERE NO DIFFERENT. 00Z NAM AND CANADIAN ARE A NICE
COMPROMISE IN THE MIDDLE WITH SUPPORT FROM THE GFS ENSEMBLE MEAN AND
GENERALLY FOLLOWED FOR NOW FOR CONSISTENCY AND GIVEN THE
UNCERTAINTY. THIS REMAINS IN LINE WITH GOING FORECAST AS WELL AS WPC
GUIDANCE WHICH KEEPS ANY FREEZING RAIN OR SNOW JUST TO OUR NORTH
THROUGH THURSDAY. MODEL TEMPERATURE GUIDANCE ACROSS OUR MICHIGAN
COUNTIES RANGES FROM LOWER 50S WITH WARMER SOLUTIONS TO UPPER 20S
WITH THE COLDER SOLUTIONS. EXPECT THE TRUTH TO BE SOMEWHERE
BETWEEN THIS LARGE SPREAD.

FULLY EXPECT CHANGES TO UPCOMING FORECASTS ONCE PACIFIC ENERGY COMES
ONSHORE AND GETS SAMPLED. ANY SHIFT TOWARD FURTHER SOUTH ECMWF WILL
BRING BOTH SNOW AND FREEZING RAIN POTENTIAL INTO THE PICTURE FOR
NORTHERN TIER OF COUNTIES AS WELL AS COOLER TEMPS FOR CENTRAL AND
NORTHERN AREAS WEDNESDAY INTO THURSDAY. THIS WILL BE MONITORED
CLOSELY BUT FOR NOW FELT IT PRUDENT TO STAY WITH THE BLENDED INITS
AND MIDDLE SOLUTIONS WHICH KEEPS TEMPS WARM ENOUGH FOR JUST RAIN
THROUGH THURSDAY AFTERNOON.

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GFS insistent on its more northerly solution. Was glad to see the GEM come south some, giving the EURO/UKIE some added credence. I noticed the 0z GEFS even nudged south.

 

If this ends up playing out like April 2003 the GFS will grudgingly trend colder. For Toronto, even the "warmer" 6z GFS is a decent ice storm Wednesday night before things warm up.

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Saying hi from the MidAtl thread! Rooting for you guys on this one as a someone who recently moved from the lakes! Good luck! Just remember, King Euro ain't always King

Sent from my iPhone using Tapatalk

Esp. When climatology is against it.

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Agreed, but how much will actually accumulate? I'm thinking Muskegon and Cadillac will be the big winners.

 

Yup.

 

The ground is still pretty cold. My soil was actually frozen on the top layer yesterday morning from the 20F low temp.

 

I'd say most will accumulate.

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GRR- Riding the Euro I guess. Looking at the snow maps of the Euro, it has the classic 15-16 winter temperature profiles shown for this region. Like so many southern Jet systems this winter(All of them) we are on the fringe of the cold air.

Has the +FZRN profiles eased on the southern flanks of the system?

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GRR- Riding the Euro I guess. Looking at the snow maps of the Euro, it has the classic 15-16 winter temperature profiles shown for this region. Like so many southern Jet systems this winter(All of them) we are on the fringe of the cold air.

 

The night shift at GRR is a little too aggressive sometimes, and this is one of those times IMHO.

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It's a bit odd seeing the national headline map with that little pocket of blue over SW MI. Doesn't seem like they coordinated with surrounding offices.

This is the earliest watch I can remember being issued and that's why no other offices wanted to join in. The typical rule of thumb for Winter Storm Watches is that they're not issued more than 4 periods (12 hrs is a period) out unless with very high confidence 5th period watches can be issued. So within 48 hours usually and rarely 60 hours. Bigger problem in this situation for going beyond even the 5th period threshold is that this is not a very high confidence situation considering the significant variance in the guidance.
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