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January 12-14 Potential storm


dilly84

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Yo , Chicago, What about RFD?

RFD:

 
THU 18Z 12-JAN  -3.4    -6.7    1000	  74	  98    0.06	 531	 531   
FRI 00Z 13-JAN  -5.6   -10.5    1001	  74	 100    0.16	 527	 526   
FRI 06Z 13-JAN  -7.4   -10.7    1003	  78	 100    0.15	 527	 525   
FRI 12Z 13-JAN  -8.2   -13.4    1007	  81	  99    0.14	 529	 524   
FRI 18Z 13-JAN  -6.6   -13.9    1011	  70	  97    0.06	 534	 525

It will also be added to the list from now on.

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My weenie statement.

I would rather be sitting on the low side of tonight's runs than on the high side with 48 hours to go. I can sleep good cause i aint got **** too lose!

You guys do atleast have the seasonal trend on your side i do believe which is for the models to end up settling on a track a bit further se when we get inside of 48 hrs. Good luck out that way. Hopefully for your sake we can get that trend to kick in and get that surface low to track just east of the state to Huron and not into MI.

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6z Nam :santa::wub: Much better! That secondary came out of nowhere tho..and it's even deeper then the low in Michigan...

Although the 6z nam looks good.. I'm still not buying it.. it just does not look right..I'm not sure what up with that secondary development and it tanks down to the lo 80s...if that secondary stays further west, and deepens then the l/p in Michigan will not be as strong, so that secondary could be dominant, basically taking all the energy from the Mi low..

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LOT

excellent discussion by Gino

BIGGER STORY WILL UNDOUBTEDLY BE THE SNOWFALL. AS VIGOROUS SHORTWAVE

DIVING SOUTHEAST INTO MT/ND EARLY THIS MORNING CONTINUES DIGGING

SOUTHEAST MODELS ALL AGREE ON CLOSING OFF A DEEP CIRCULATION. AS

CIRCULATION CLOSES OFF...WINDS TO THE NORTH OF IT WILL BACK

RESULTING IN TIGHTENING TEMPERATURE GRADIENT ALONG INVERT TROUGH

AXIS THAT EXTENDS NORTH FROM THE UPPER LOW. THIS BAND WILL

EVENTUALLY TRANSITION INTO A MORE CLASSIC DEFORMATION ZONE AS UPPER

LOW PIVOTS NORTHEAST AROUND THE BASE OF THE TROUGH.

WILL BE ISSUING A WINTER STORM WATCH FOR AREAS NORTH OF INTERSTATE

80...HOWEVER IT WAS NOT AN EASY DECISION HAVING TO WEIGH A MULTITUDE

OF FACTORS BOTH FOR AND AGAINST. SLOW EVOLUTION AND MOVEMENT OF THE

UPPER LOW WILL RESULT IN A LONG DURATION EVENT...FOR WHICH THE 8

INCH WARNING CRITERIA MAY BE DIFFICULT TO BE MET. HOWEVER...STRONG

NORTHWEST WINDS ARE EXPECTED TO GUST TO OVER 30 MPH AT TIMES

RESULTING IN CONSIDERABLE BLOWING AND DRIFTING DEVELOPING BY

THURSDAY NIGHT...ESPECIALLY IN OPEN AREAS. VERY POSSIBLE ALL OR

PORTIONS OF THIS WATCH MAY END UP EVENTUALLY GOING TO AN ADVISORY

VS A WARNING.

ANOTHER COMPLICATING FACTOR IS THAT CONFIDENCE IN FORECAST SNOWFALL

TOTALS IS LOWER THAN AVERAGE. FORECAST SOUNDINGS CERTAINLY SUGGEST

THAT THE PRIME DENDRITIC GROWTH ZONE WILL GROW TO BECOME VERY DEEP

LATER THURSDAY AFTERNOON INTO THURSDAY NIGHT...HOWEVER FORECAST

OMEGA IS NEVER REALLY OVERLY STRONG. BEST GUESS AT THIS TIME IS THAT

WE ARE LOOKING AT A LONG DURATION LIGHT TO MODERATE SNOW EVENT WITH

SNOWFALL TOTALS GENERALLY ENDING UP IN THE UPPER END OF THE ADVISORY

RANGE. HOWEVER...AS LOW TO MID LEVELS COOL/DENDRITIC GROWTH ZONE

DEEPENS WOULD ANTICIPATE SNOW:LIQUID RATIOS TO REALLY RAMP UP

THURSDAY NIGHT WHICH SHOULD COINCIDE WITH INCREASINGLY STRONG

NORTHWEST WINDS RESULTING DETERIORATING CONDITIONS. STILL A LITTLE

TOO EARLY TO START PINNING DOWN SNOWFALL TOTALS...PARTICULARLY IN

LIGHT OF THE UNCERTAINTIES REGARDING SNOW:LIQUID RATIO...HOWEVER A

SOLID 4-8" LOOKS PLAUSIBLE FOR NE IL AND NW INDIANA...WITH TOTALS

PROBABLY MORE IN THE 2-6" RANGE ELSEWHERE. NO DOUBT THESE NUMBERS

WILL REQUIRE SOME REFINEMENT IN LATER FORECASTS AND WILL KEEP

AMOUNTS MORE GENERALIZED IN THE WSW.

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Trends continues to improve, stronger, wetter, south, longer. Of particular note is the duration which is key to realizing heavy amounts without a real moisture connection. When you combine the dynamics of a rapidly developing low, deep DGZ, duration and increasing model consensus on .5+ QPF (omg at the 0z gfs mean)......my initial call was too low. Revised IMBY call for 8.5".

99% chance that magnificent Illini win is influencing my call...still smiling.

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Trends continues to improve, stronger, wetter, south, longer. Of particular note is the duration which is key to realizing heavy amounts without a real moisture connection. When you combine the dynamics of a rapidly developing low, deep DGZ, duration and increasing model consensus on .5+ QPF (omg at the 0z gfs mean)......my initial call was too low. Revised IMBY call for 8.5".

99% chance that magnificent Illini win is influencing my call...still smiling.

Illini sucks!:) (not really) I just want 7in so can go snowmobiling but I would take more snow than that.

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Some credence to a rather obvious perspective for us snow weenies in Chi-metro:

Using NWS LOT's preliminary monthly climate data tables, ORD has had only three 1"+ cumulative snow events since GHD blizzard.

5.8" fell 2/6-7/11

1.3" fell 2/26/11

1.2" fell 12/17/11

Think local drivers will be a little rusty?

Car pooling into western burbs this morning, IDOT already had a couple plows out on 90. Probably just refreshing or checking for obstructions along their routes but good to see.

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99% chance that magnificent Illini win is influencing my call...still smiling.

Paul FTW. Holy 3 pointers.

Anyway, I am taking a stab and going 7 IMBY.

I am stuck in Connecticut, and my forecast is Snow to Sleet to Freezing Rain to Really Cold Rain ALL DAY to Sleet to back-end snow. So post plenty of photos of this event so I can share in what I am missing!

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