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January 30-February 3rd Wave Train Part 2


Chicago Storm

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The latest guidance is not necessarily the best guidance. The 00z runs before the March 5th event last year backed off fairly significantly on qpf, only to be completely wrong. QPF is what the models do worst, so I highly doubt there's gonna be any downgrades based off a few runs of the NAM. The forcing parameters are what's important, not specific qpf totals.

Sent from my SCH-I535

 

 

I remember Tom Skilling saying something like that earlier this winter.  I think natural tendency is to think that the most recent runs must be the most accurate since they have the most updated data.  At least wait for the other 00z models to come in...but besides that, we are getting into short range/nowcast time.

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I know its out of character for me to be sooo whiny lol...but another gripw I have is we finally get a storm with no wind and it looks to miss me mostly.

 

Now maybe not a miss. But at the time surely a valid gripe :cry:

 

I think the Livingston crew (Roy and me) are all snow now.

 

5-9 Inches looks good.

 

Ahhhhh..a SEMI "classic" :pimp:

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12z Euro led the way and every single run since has followed...south and drier, including the GFS, NAM, RGEM, RAP, HRRR, etc. This isn't a single run quick impression...it's a clear trend. 

 

3-6" from NW to SE across LOT's CWA looks appropriate. Per Baum, respectable but far from major.

 

Don't hate the player, hate the game.

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Waiting on 0z NAM cobb. Looks to be coming in line with the RGEM and euro. Potentially higher then the 6.7" it had on the 18z run.

 

Snowstorms was right though. Looks like a small down tick in QPF. No widespread 0.75"+ like the last several runs. But I think trading that for more abundance of cold is something we'd all go for.

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Snowstorms was right though. Looks like a small down tick in QPF. No widespread 0.75"+ like the last several runs. But I think trading that for more abundance of cold is something we'd all go for.

Music to my ears.... 4km NAM has a similar idea as well. Its about time we have a shot at hitting the half foot mark.

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12z Euro led the way and every single run since has followed...south and drier, including the GFS, NAM, RGEM, RAP, HRRR, etc. This isn't a single run quick impression...it's a clear trend.

3-6" from NW to SE across LOT's CWA looks appropriate.

Don't hate the player, hate the game.

True dat.

We've seen several systems end up drier at the last minute already this season (See the last two waves of the hybrid parade as an example).

Interestingly enough, in many of those cases the ECMWF was one of the driest and ended up being the most realistic...

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Snowstorms was right though. Looks like a small down tick in QPF. No widespread 0.75"+ like the last several runs. But I think trading that for more abundance of cold is something we'd all go for.

 

QPF and temperatures are a matter of now-casting but we've got the general picture in mind.

 

Wheres TorontoBlizzard? He'd be going crazy right now,  :lmao:

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LOT update

 

FXUS63 KLOT 010221
AFDLOT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
821 PM CST FRI JAN 31 2014

.DISCUSSION...
800 PM CST

ONLY MADE MINOR ADJUSTMENTS WITH THIS UPDATE. RAISED POPS AND SNOW
AMOUNTS FOR AREAS SOUTH OF I-80 TO ACCOUNT FOR THE STRONGER
BANDING OCCURRING. NOTE HOWEVER...STILL THINKING STORM TOTAL SNOW
AMOUNTS FOR AREAS SOUTH OF I-80 WERE NOT CHANGED AND STILL REMAIN
IN THE 2 TO 6 RANGE. THE BANDING IS EXPECTED TO CONTINUE THROUGH
THIS EVENING BEFORE DISSIPATING.

LOWERED POPS ACROSS THE IL/WI STATE LINE THIS EVENING AS THE SNOW
IS ADVANCING A BIT SLOWER THAN EXPECTED. NOW EXPECTING SNOW TO
REACH THE STATE LINE OVERNIGHT.

EVERYTHING ELSE REMAINS ON TRACK INCLUDING THE ONGOING HEADLINES.
NEW MODEL RUNS HAVE SHIFTED FEATURES FARTHER SOUTH AND/OR HINTED
AT LESS QPF...BUT AM HESITANT TO MAKE MAJOR CHANGES RIGHT NOW.
THEREFORE LEFT WELL ENOUGH ALONE.


JEE

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Done snowing here on the east side, so it's a wrap other than a few scraps. But successful WAA snows here today. Very happy. It'll get washed away tomorrow, but beggars can't be choosers.

 

Good luck to those up north, and keep your chins up. Should still be a pretty good snow.  

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LAF is really teetering on the 00z NAM forecast soundings from late morning into early afternoon as a slug of heavier precip comes in.  00z run initialized a bit too warm here.  A changeover to plain rain is inevitable but perhaps the timing can get pushed back a tad.

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Quad cities weighs in

 

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
812 PM CST FRI JAN 31 2014

.UPDATE...
ISSUED AT 803 PM CST FRI JAN 31 2014

LATEST NAM IS TRENDING TOWARD VERIFICATION AND INITIALIZATION OF
TOO MOIST AS HAS BEEN THE CASE MUCH OF THIS WINTER FOR THE AMERICAN
SOLUTIONS. HAVE TRIMMED STORM SNOW AMOUNTS 10-15% MOST LOCATIONS WITH
RISK OF ANOTHER 10 PERCENT OR MORE REDUCTION MAY BE NEEDED OVER PARTS
OF THE AREA BY OVERNIGHT CREW. FORCING TOOLS SUGGEST HIGHEST AMOUNTS
OF 6 TO 7 INCHES (ISOLATED 8 INCH?) ROUGHLY ALONG A MEMPHIS MO TO SOUTH
OF GALESBURG TO SOUTH OF HENNEPIN IL AXIS. UPDATE WITH NEW WSW OUT
NEXT 30 MINUTES. WILL NOT CHANGE WARNING/ADVISORY SETUP FOR NOW AS
HEAVIER PRECIPITATION FOR EVENT IS STILL 4-6 HOURS AWAY FOR OUR AREA.
THIS SUGGESTS...~ 3 INCHES DBQ AREA...3-4 INCHES CID/IOW AREA AND MOSTLY
4-6 INCHES FOR THE GREATER QUAD CITIES AREAS. MAIN ISSUE IS THIS IS
AN OPEN WAVE MAKING ANY TRAINING OF PRECIPITATION TO BE M

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The trend around here the whole Winter has been to not buy into the models with the higher QPF's and not to buy in to the N shifts on models as much.  Its been that way around the DVN CWA the WHOLE Winter.  I cannot for the life of me understand why the NWS or any private forecaster on TV hasn't noticed this.  Clippers have trended N sure, but most synoptic oriented systems have been S.  And the drying trend on models has been there all along.  I told my clents yesterday, and friends, I expected 3 to maybe 4 inches here locally with perhaps 5-7" from Galesburg up to around the South burbs of Chicago.  This call might even end up being a hair to high.  Glad I stuck with it though.

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LAF is really teetering on the 00z NAM forecast soundings from late morning into early afternoon as a slug of heavier precip comes in.  00z run initialized a bit too warm here.  A changeover to plain rain is inevitable but perhaps the timing can get pushed back a tad.

 

I saw that. Might make my drive into work a little more challenging. :lol:

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True dat.

We've seen several systems end up drier at the last minute already this season (See the last two waves of the hybrid parade as an example).

Interestingly enough, in many of those cases the ECMWF was one of the driest and ended up being the most realistic...

 

Yeah that's my thoughts exactly.  Euro has nailed about every system for this immediate area within 48-60hrs, but that's obviously not the case for other areas off east, etc.

 

Still sticking with my general 3-4" for here/QC.  My exact call of 3.1" from late last night looking money.

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The trend around here the whole Winter has been to not buy into the models with the higher QPF's and not to buy in to the N shifts on models as much.  Its been that way around the DVN CWA the WHOLE Winter.  I cannot for the life of me understand why the NWS or any private forecaster on TV hasn't noticed this.  Clippers have trended N sure, but most synoptic oriented systems have been S.  And the drying trend on models has been there all along.  I told my clents yesterday, and friends, I expected 3 to maybe 4 inches here locally with perhaps 5-7" from Galesburg up to around the South burbs of Chicago.  This call might even end up being a hair to high.  Glad I stuck with it though.

 

100% agree. 

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