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January 3-6th Winter Storm Part 2


Chicago Storm

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Forecast discussion from CMC (Environment Canada). Looks like they favour a more SE/E track. For those in the Toronto area, let's hope they're correct.

 

FXCN01 CWAO 040930
MAIN WX DISCUSSION
ATLANTIC STORM...
MDLS ARE IN GOOD AGRMNT WITH TRAJECTORY AND INTENSITY OF DEEPENING ATLANTIC
STORM MOVG AWAY FROM NFLND EARLY IN PD. NAM SHOWING MORE QPF OVR THE AVALON AND
THE BONAVISTA PENINSULAS EARLY IN PD AND NAM HIER AMTS OVER SOUTHEASTERN NFLND
ON THE 06H QPF VERIF VLD 06Z VERIFIED BETTER.
COLD ARTIC AIR OVER QC MOVES IN OVER NEWFOUNDLAND BEHIND THAT SYSTEM WITH
STREAMERS EXPECTED OFF THE GULF OF ST LAWRENCE AND HI WIND CHILL FOR NORTHERN
NFLND. CONDITIONS WILL MODERATE ON SUNDAY WITH THE APPROACH OF A RIDGE OF HI
PRESSURE.
AB CLIPPER OVER UPR MS VLY TRACKING TO JMSBA THAN RETROGRADING TO HNSBA...
MORE THAN ONE LOW IN THE ELONGATED TROF EARY IN PD AS SHOWN ON 06Z ANAL THEN
MDLS FAIRLY AGREE TO MOVE ONE SFC LO TO JSMBA BY 36H, GLB BEING ON THE WEST
SIDE OF THE TRACK AND UKMET ON THE EAST SIDE WITH REG AND GEPS OFFERING A GOOD
COMPROMISE HERE. EXCEPT FOR UKMET KEEPING TRACK TO THE EAST, MDLS AGREE TO
RETROGRADE THAT SYSTEM INTO HNSBA BY END OF PD. BY 48H THO REG IS LAGGING
BEHIND ALOFT WITH DEEPER FARTHER W UPR TROF OVER WRN ONT INTO MN AND IS
LIKLEY TOO DEEP AND TOO FAR WEST WITH TRAILING SFC TROF ACRS THE GRTLKS BY MID
PD. SOME ENHANCED QPF EXPECTED OFF THE GRTLKS SOUTH OF THE SYSTEM EARLY IN PD.
06H QPF VERIF VLD AT 06Z SHOWING THAT CAN MDLS UNDERFCST LCLLY AMTS NORTH OF
LAKE SUP. AS SYSTEM RETROGRADES TO HNSBA PUSHING STG WINDS THE THE WRN HNSBA
CST, CMC OBJ SIG WX CHARTS SHOWING POT FOR BLIZZARD CONDITIONS TO DEVELOP
ALG THE WRN CST OF HSNBA.
APPROACHING SYSTEM SOUTH OF THE GRTLKS...
REG IS THE DEEPEST WITH UPR TROF OVER THE STATES ON DAY 2 AND MORE INTENSE
WITH SHRTWV MOVG TO INDIANA BY 48H LOWERING CONFIDENCE IN ITS FCST OF A DEEPER
FASTER SYSTEM TRACKING TOO FAR WEST SOUTH OF THE GRTLKS ON DAY 2 AND LIKELY TO
SPREAD TOO MUCH QPF TOO FAST INTO GRTLKS. EXCEPT FOR NAM BEING TOO FAR NORTH,
REMAINING MDLS AGREE WITH THE MAX PCPN AXIS NORTH OF LAKE ERIE AND LAKE ONT.
FREEZING RAIN AHEAD OF THAT SYSTEM EXPECTED TO REMAIN SOUTH OF THE INTNL BORDER
DURG PD.

INCREASING GRADIENT OVR YK...
REGIONAL ON THE STG SIDE MOVG AK UPR RDG INTO YK BY END OF PD. GLB OFFERS A
BETTER CONSENSUS WITH FOREIGN MDLS WITH A SOMEWHAT WEAKER FEATURE. MDLS IN
FAIRLY GOOD AGRMNT MOVG EPAC SYSTEM NORTH OF ALUTN BY END OF DP AND FNTL WV
INTO SRN YK INCREASING WINDS OVER THAT AREA AND GIVING BLIZZARD CONDITIONS TO
DEMPSTER AND NORTHERN YK CST.
END OUELLET

 

http://weather.noaa.gov/pub/data/raw/fx/fxcn01.cwao..txt

 

 

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That's the dilemma. When we cream you guys snowstorm wise (dec 26, 2012...dec 14, 2014...dec 31, 13 - jan 3, 14) you get pixie dust. When you cream us, its pick which evil is at play (dryslot, sleet, rain).

Wow.  You are an amazing forecaster.  Josh whats your secret.  How much are you getting?  :whistle::P   ... I know you meant 2013 :D

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Overnight model summary for YYZ is below. Euro has stayed consistent on amounts but the GFS is slowly warming up temp profiles towards the consensus. The GFS has come down from the 9"+ amounts that it previously had to accums near 7" as ratios have lowered to near 10:1. Nice to know we've reached a consensus. :axe:

 

0z euro: 6-7"

6z GFS: 7-9"

6z NAM: Trace

SREF mean: 4.8"

RGEM: 2-4"

Ec ENS: 5-6"

GEFS/R: 4-5"

 

Hopefully the 12z runs come to a consensus. The 6z NAM is concerning, but hopefully the 12z NAM makes a correction in the other direction.

 

My first call is the same as SSC, 3-6".

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The only time we ever seem to beat downriver during very cold events is where a lucky band sets up over central Oakland over to Shiawassee county. Usually we always get poor snowfall rates in storms like this past weekend when cold air isn't an issue for either of us.

It's that band with high ratios.  It occurs in several storms and sometime steals the show as it did a few years ago with a perfect track for our area yet areas well NW of here got the most snow. 

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I think this is a rare time where I have about 75-100 miles if wiggle room on the NAM before my snow totals get changed much.

Sent from my HTC6435LVW

I also like the fact this storm is not complete wrapped up before it starts.  The storms already wrapped up as the head into MI seem to fail in this area.

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Rain probs up to 34% for IND on the 9z SREF.

 

Plume mean snowfall off the 9z run. Reductions for Indy and south.

 

BMG: 5.9" (15.8" high, 0.8" low)

HUF: 9.5" (17.0" high, 2.5" low)

FWA: 9.5" (18.2 high, 2.9" low)

IND: 8.7" (16.2" high, 2.0" low)

LAF: 11.2" (16.7" high, 5.1" low)

MIE: 7.8" (15.1" high, 1.7" low)

SBN: 15.4" (23.9" high, 8.0" low)

VPZ: 12.9" (17.6" high, 7.5" low)

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