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February 21st - 23rd Winter Storm Part 2


Powerball

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It's much tamer than the NAM/hi-res NAM solutions some are riding but yeah. You look locked and loaded for 1-2"

 

 

yeah NAM is still in catchup mode for awhile yet.   Pretty much going as planned since the downfall of this one started..   4-6 hr wall of snow light to light +

 

  1-2"  for me and you.. if we're lucky 3-4"

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yeah NAM is still in catchup mode for awhile yet.   Pretty much going as planned since the downfall of this one started..   4-6 hr wall of snow light to light +

 

  1-2"  for me and you.. if we're lucky 3-4"

 

 

agree...looks like the NAM will be taking another step towards the drier runs at 12z

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agree...looks like the NAM will be taking another step towards the drier runs at 12z

 

bad call...weaker at 850/700 but wetter...maybe waiting a little longer to peak?

 

EDIT: wetter in MO but ****s the bed aggressively over N. IL cuts back totals for most.

 

QC/Cyclone should like this run...big weenie band incoming

 

nam_namer_036_sim_radar.gif

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MKX

THURSDAY AND FRIDAY...FORECAST CONFIDENCE MEDIUM TO HIGH.

A CLOSED UPPER LOW WILL TRACK FROM THE TEXAS PANHANDLE TO EASTERN

NE/KS ON THURSDAY...AND INTO SOUTHERN MN BY FRIDAY MORNING. SURFACE

LOW PRESSURE WILL BE IN THE PROCESS OF WEAKENING AS IT REACHES THE

MIDWEST FRIDAY MORNING. STRONG UPPER DIVERGENCE WITH THE LEFT EXIT

REGION OF THE UPPER JET...THE NOSE OF AN 850MB JET...700MB

FRONTOGENESIS AND DECENT OMEGA...ALONG WITH STRONG AND DEEP Q-VECTOR

CONVERGENCE WILL LEAD TO A BAND OF MODERATE SNOW ON THE NORTH SIDE

OF THE SURFACE LOW.

THAT BAND OF MODERATE SNOW WILL SPREAD INTO SOUTHWEST WI EARLY THU

EVENING AND EXIT EAST CENTRAL WI EARLY FRI MORNING. LIGHT SNOW

SHOWERS WILL CONTINUE THROUGH MUCH OF FRI WITH THE UPPER LOW

MEANDERING ACROSS WI. EXPECTING ABOUT A 6 TO 8 HOUR PERIOD OF SNOW

WITH ACCUMULATIONS OF 3 TO 5 INCHES IN ALL AREAS THURSDAY NIGHT.

CONSENSUS LIQUID EQUIVALENT IN THAT 12 HOUR PERIOD LOOKS TO BE ABOUT

A QUARTER INCH. ANOTHER HALF INCH UP TO 2 INCHES OF SNOW IS LIKELY

ON FRIDAY...WITH HIGHER AMOUNTS TOWARD CENTRAL WI. A WINTER WEATHER

ADVISORY WILL LIKELY BE NEEDED FROM THU EVENING THROUGH FRI MORNING.

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12z NAM has 0.42" for LAF. Dry air is impressive though, we go from 11% RH at 850 at 36 hours, to 100% at 42 hours. Also that small but pesky warm initially, but verbatim we take care of that with relative ease. Still leaning low on snowfall for here...but we'll see. If the band that swings through is "spotty" heavy, that may make the difference in what we get. Duration also lowers the stakes. 

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12z NAM has 0.42" for LAF. Dry air is impressive though, we go from 11% RH at 850 at 36 hours, to 100% at 42 hours. Also that small but pesky warm initially, but verbatim we take care of that with relative ease. Still leaning low on snowfall for here...but we'll see. If the band that swings through is "spotty" heavy, that may make the difference in what we get. 

 

 

It is impressive...the 12z NAM and 4km NAM were both even wetter over MO but dry air just slaughters what looks like a classic winter storm as it heads into our area. 

 

Minor off topic point, but it looks like we might finally get the kind of expansive plains snowpack that will play a role in future baroclinic zones.

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It is impressive...the 12z NAM and 4km NAM were both even wetter over MO but dry air just slaughters what looks like a classic winter storm as it heads into our area. 

 

Minor off topic point, but it looks like we might finally get the kind of expansive plains snowpack that will play a role in future baroclinic zones.

 

Yeah, impressively bad for us. :lol:

 

And yes, it'll be interesting to see what effect that has. Euro last night went south with the follow up system, making for an interesting front end situation for N IL. Where have we seen that before...

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How much snow are they expecting in Kansas City? Will it be close to at 24 hr snowfall records?

 

about 5-8" 

 

 

1 1912 March 22-24 24.2 Inches 20.5 Inches (23rd)

2 1894 Feb 11-12 15.8 Inches 8.7 Inches (12th)

3 1958 January 20-21 14.6 Inches 10.5 Inches (21st)

4 1962 January 18-19 14.0 Inches 11.8 Inches (18th)

5 1960 March 14-15 13.8 Inches 8.0 Inches (15th)

6 1930 January 8-9 13.7 Inches 12.8 Inches (8th)

7 1900 February 27-28 13.0 Inches 11.8 Inches (27th)

8 1926 March 29.31 12.3 Inches 7.5 Inches (30th)

9 1918 December 23-24 12.2 Inches 9.5 Inches (24th)

10 1915 March 3-5 11.9 Inches 10.4 Inches (4th)

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After juicing up yesterday as the system was coming ashore, the newer runs are backing down with the qpf across Iowa.  The 00z Euro dropped way down to about 0.33", the GFS is back down to near 0.40", and of course the NAM is coming back closer to reality by dropping from 0.95" to 0.60(and should continue falling today.

 

Yesterday I was thinking 6 inches for Cedar Rapids, but now I'm going with 4 inches for my prediction.

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SREF ensemble mean snow totals (best I can estimate in some cases). 2/19 15z, 2/19 21z, 2/20 3z, and 2/20 9z runs below...in chronological order.

 

BTL: 2.6"...3.0"...3.0"...2.7"

CID: 8.1"...8.9"...9.1"...8.5"

CMI: 2.2"...2.1"...2.2"...1.8"

DBQ: 8.1"...8.8"...8.8"...7.5"

DKB: 5.9"...6.5"...6.4"...5.5"

DSM: 9.8"...11.2"...10.9"...10.1"

DTW: 1.6"...1.5"...1.4"...1.2"

DVN: 7.4"...8.0"...8.0"...7.5"

FWA: 1.2"...1.3"...1.1"...1.1"

GRR: 3.2"...3.7"...3.6"...3.0"

IKK: 3.7"...3.9"...4.1"...3.2"

IND: 0.7"...0.5"...0.8"...0.6"

JOT: 5.1"...5.8"...5.7"...5.0"

LAF: 1.4"...1.3"...1.5"...1.2"

LSE: 7.2"...7.3"...6.8"...6.5"

MCI: 11.6"...13.0"...11.6"...11.3"

MKE: 5.7"...5.7"...5.3"...5.0"

MKG: 3.5"...4.2"...3.7"...3.5"

MLI: 7.2"...7.8"...7.8"...7.4"

MSN: 6.4"...6.7"...6.3"...5.8"

ORD: 5.3"...5.7"...6.1"...5.1"

PIA: 5.4"...6.4"...6.6"...5.5"

RFD: 6.2"...6.8"...6.7"...5.9"

STL: 2.4"...2.9"...2.1"...2.3"

UGN: 5.4"...5.7"...5.6"...4.7"

UIN: 7.3"...9.0"...8.0"...7.1"

VPZ: 2.9"...3.0"...3.5"...2.7"

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