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January 30-February 3rd Wave Train Part 2


Chicago Storm

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So looking at the 00z NAM's top-down sounding, the max temperature is only 0.8*C at 875mb for DET. And this is only for 21z Saturday. The other soundings are all below freezing. 

 

Almost there...

 

And lol at the Illinois folks talking about the system trending weaker and drier. NAM produces just over 0.9" of QPF at DET. So yeah, definitely dry as a bone. 

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Actually, according to the surface parameters, the 00z NAM is all snow for DET.

 

http://68.226.77.253/text/NAMSFC/NAM_KDET.txt

 

 

 

9 02/01 09Z 24 23 97 3 0.02 0.00 533 549 -6.0 -22.5 1021 100 -SN 006OVC355 0.2 0.9
12 02/01 12Z 24 23 114 5 0.03 0.00 535 551 -5.0 -21.4 1019 100 -SN 005OVC383 0.3 1.6
15 02/01 15Z 27 27 112 6 0.07 0.00 538 552 -3.9 -20.2 1018 100 -SN 000OVC304 0.7 0.6
18 02/01 18Z 30 29 129 6 0.07 0.00 541 552 -0.9 -19.8 1013 100 -SN 000OVC346 0.8 1.1
21 02/01 21Z 31 31 109 3 0.16 0.00 543 551 0.1 -20.0 1010 100 SN 005OVC364 1.1 1.3
24 02/02 00Z 31 31 189 2 0.35 0.00 543 551 -1.2 -18.1 1009 100 SN 008OVC365 3.7 0.3
27 02/02 03Z 30 29 313 6 0.17 0.00 541 549 -2.3 -18.9 1010 100 -SN 006OVC357 1.7 0.8
30 02/02 06Z 27 25 321 9 0.03 0.00 537 547 -4.4 -19.9 1012 100 -SN 006OVC364 0.3 1.8
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He kinda has to do that given the ptype issues in part of the area.  WGN viewing area is pretty big and there could easily be that kind of spread in totals.

 

yeah exactly. He isn't throwing out a general call for 5-10".  He said some parts of the area will get close to 5".  Others will see closer to 10".  Big area to cover in one forecast. 

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Nah. Been making calls long before that model existed. Been following since about 1980. Either way, if RPM shows 4" and GFS 6" what's to change.

 

 

I agree and was just joking about his new RPM love.   still a nice hit and no sense panicking too early for chicago area. 3-6" or 4-8" what's the difference outside the sack really.    Minor shifts in track and intensity make a huge deal in where the higher totals will set up though and might end up a bit further south than thought by some and models.  Geos really gonna have to work that magic ruler to stay ahead of ORD

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So WAA snows so far are overachieving while the radar out across KS already looks pretty sweet.

 

Hoping for the best, but still expecting the worst (granted the trends have been encouraging).

Would've been nice to see the GFS come south a bit but it does feel good to have the euro kinda on our side. I think anyone north of detroit and west of 75 is golden. Its those to the east of 75 that I think will get more of a mix. So many models and outcomes. Guess its nowcast time now...

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Would've been nice to see the GFS come south a bit but it does feel good to have the euro kinda on our side. I think anyone north of detroit and west of 75 is golden. Its those to the east of 75 that I think will get more of a mix. So many models and outcomes. Guess its nowcast time now...

 

I just noticed you're a bit further south from your usual location (Macomb Twp.?).

 

Convective snows will certainly help the cause, which seems to be what the NAM and the NMM hint at. 

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I just noticed you're a bit further south from your usual location (Macomb Twp.?).

 

Convective snows will certainly help the cause, which seems to be what the NAM and the NMM hint at. 

Yea I moved about 5 miles further south. I was in the most southern part of macomb at my parents house. Was in the back of my mind when looking at houses to try to find a house further north so I don't have to worry about mixing issues so much in winter lol.

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Yea I moved about 5 miles further south. I was in the most southern part of macomb at my parents house. Was in the back of my mind when looking at houses to try to find a house further north so I don't have to worry about mixing issues so much in winter lol.

 

Yeah. Your old location is in a much safer position for this one.

 

But more good news is that the 00z NMM keeps the 0*C 850mb to the SE of us all, including michsnowfreak.  :tomato:

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So looking at the 00z NAM's top-down sounding, the max temperature is only 0.8*C at 875mb for DET. And this is only for 21z Saturday. The other soundings are all below freezing. 

 

Almost there...

 

And lol at the Illinois folks talking about the system trending weaker and drier. NAM produces just over 0.9" of QPF at DET. So yeah, definitely dry as a bone. 

Definitely feeling better about this tonight than I did last night. Gonna be a wait-and-see type situation for us.

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Actually, according to the surface parameters, the 00z NAM is all snow for DET.

 

http://68.226.77.253/text/NAMSFC/NAM_KDET.txt

 

I was just looking at that. I wonder why it shows straight RA for KDTW with the 2m temp at 31F though? I would think that would show up as FZRA. Either way as long as the precip stays frozen I'd be more than happy, anything but rain.

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03z RAP pretty anemic with qpf from the QC northwest.  Looks like 2-4" for QC, with maybe 1-2" for Hawkeye, and barely anything for DLL. 

 

 

The RAP of this winter beats on.   at least there is chances on the models outside of tracking 30:1 ratio clippers but we know how that chapter started and ended before the clipper pattern set in..

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mcd0047.gif

 

 

 

MESOSCALE DISCUSSION 0047
NWS STORM PREDICTION CENTER NORMAN OK
1134 PM CST FRI JAN 31 2014

AREAS AFFECTED...EAST-CENTRAL/SOUTHEAST KS TO CENTRAL/NORTHEAST MO

CONCERNING...WINTER MIXED PRECIPITATION

VALID 010534Z - 011030Z

SUMMARY...WINTER MIXED PRECIPITATION WILL CONTINUE TO
DEVELOP/INCREASE IN INTENSITY OVERNIGHT...INITIALLY AS
SLEET/FREEZING DRIZZLE...WITH FREEZING RAIN BECOMING INCREASINGLY
COMMON ACROSS PARTS OF CENTRAL/NORTHEAST MO INCLUDING THE I-70
CORRIDOR. AT LEAST LOCALIZED LIQUID EQUIVALENT PRECIPITATION AMOUNTS
EXCEEDING 0.05 IN/HR ARE LIKELY. MEANWHILE...MODERATE SNOW WILL BE
COMMON ACROSS FAR NORTHERN MO AND ADJACENT PARTS OF SOUTHERN IA/FAR
WESTERN IL THROUGH EARLY MORNING.

DISCUSSION...AS STRENGTHENING CYCLONIC/SPLIT UPPER FLOW EXISTS
ACROSS MUCH OF THE FOUR CORNERS AREA/PLAINS...LATE-EVENING ANALYZED
QUASI-STATIONARY SURFACE FRONTAL ZONE EXTENDS GENERALLY
SOUTHWEST-NORTHEASTWARD FROM NORTH-CENTRAL TX/EASTERN OK TO ROUGHLY
ALONG THE I-44 CORRIDOR OF MO. COINCIDENT WITH THE COLDER AIR NORTH
OF THIS BOUNDARY...COOLING CLOUD TOPS AND A GRADUALLY EXPANDING
PRECIPITATION SHIELD ARE READILY EVIDENT IN IR SATELLITE/RADAR
IMAGERY RESPECTIVELY AS OF 05Z.

FOCUSED NORTH OF THE SURFACE FRONTAL ZONE...INCREASING WARM
ADVECTION/ISENTROPIC ASCENT WILL CONTINUE TO LEAD TO INCREASING
WINTER-MIXED PRECIPITATION RATES OVERNIGHT FROM
EAST-CENTRAL/SOUTHEAST KS INTO CENTRAL/NORTHEAST MO. EMBEDDED
CONVECTIVE ELEMENTS WILL FURTHER AUGMENT PRECIPITATION RATES. THIS
IS EVIDENCED BY EPISODIC CLOUD-GROUND LIGHTNING STRIKES ACROSS
SOUTHERN KS THIS EVENING...ASIDE FROM OBSERVATIONAL/GUIDANCE
INDICATIONS OF VERY WEAK ELEVATED BUOYANCY OVERNIGHT WITHIN THIS
CORRIDOR.


WHILE SLEET/FREEZING DRIZZLE WILL OCCUR INITIALLY...FREEZING RAIN
SHOULD BECOME INCREASINGLY COMMON...PARTICULARLY ACROSS
CENTRAL/NORTHEAST MO THROUGH 09Z-12Z. THIS INCLUDES AREAS ROUGHLY 50
MILES EITHER SIDE /NORTH AND SOUTH/ OF I-70. HERE...NEAR-SURFACE
TEMPERATURES ARE LIKELY TO REMAIN BELOW FREEZING...WHILE STRONG WARM
ADVECTION WILL ACCOUNT FOR A 1500-2000 M DEEP FULL-MELTING LAYER
BASED AROUND/ABOVE 900 MB AS SATURATION OTHERWISE QUICKLY OCCURS.

..GUYER.. 02/01/2014


ATTN...WFO...LSX...SGF...EAX...TOP...ICT...

LAT...LON 39719249 39739158 39249095 38699126 38059348 37479621
38079641 38859572 39069407 39719249
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