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12/20-12/21 Moderate/Intense Clipper Event?


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set to 24 hours, and 20 frames/sec, and I could watch that all day

http://www.atmos.was...ather/sat.shtml

Here are all their feeds. They have a ton of data to supplement other satellite data sites. http://www.atmos.washington.edu/~ovens/loops/

The loop you have above...do it 48 hours smile.gif

That is beautiful.

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nam and gfs still apparently off by a couple hundred miles on where the heaviest precip axis lines up across MN/IA. NAM and a few SREF members are close to bringing it north of MSP.

regardless, this is probably enough to have MPX hoist a watch tonight.

Why the heck not, with their luck this winter it'll likely turn into another 1' storm for the Minneapolis area.

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MSP:

0z...

ECMWF: 0.40"

GFS: 0.50"

NAM: 0.85"

GGEM: 0.25-0.50"

LSE:

0z...

ECMWF: 0.32"

GFS: 0.55"

NAM: 0.65"

GGEM: 0.50-0.75"

MKE:

0z...

ECMWF: 0.35"

GFS: 0.50"

NAM: 0.43"

GGEM: About 0.50"

ORD:

0z...

ECMWF: 0.28"

GFS: 0.46"

NAM: 0.42"

GGEM: 0.50-0.75"

LAF:

0z...

ECMWF: 0.11"

GFS: 0.32"

NAM: 0.42"

GGEM: 0.10-0.25"

CMH:

0z...

ECMWF: 0.08"

GFS: 0.17"

NAM: 0.07"

GGEM: About 0.25"

DTW:

0z...

ECMWF: 0.12"

GFS: 0.20"

NAM: 0.10"

GGEM: About 0.10"

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MPX riding the NAM/EURO

AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN

212 AM CST SUN DEC 19 2010

OVER THE PAST SEVERAL MODEL RUNS...ECMWF AND THE NAM HAVE BEEN

TRACKING THE 70H LOW AND ASSOCIATED QPF AMTS AND FORCING...FURTHER

NORTH AND SLIGHTLY FASTER. GFS IS THE OUTLIER AND FURTHER SOUTH.

BUT QPF AMTS ARE SOMEWHAT SIMILAR WITH A GOOD 0.4 TO 0.7 INCHES

/24 HRS/ WHICH TRANSLATES TO 5 TO 8 INCHES OF SNOWFALL BASED ON

10 TO 12-1 RATIO. HOWEVER...THE MUCH DRIER AIR TO THE NORTHEAST OF

THE FA...MAY AID IN MORE OF A 14 TO 16-1 RATIO WHICH WOULD YIELD 6

TO 10 INCHES OF SNOWFALL IN LESS THAN 24 HRS. DUE TO THE NORTHERN

TRACK AND SOMEWHAT WARMER/HIGH WATER CONTENT AIR MOVING INTO THE

FA FROM THE SOUTH...AM MORE INCLINED TO USE THE LOWER 10 TO 12-1

RATIOS. TOO MANY OPTIONS TO CONSIDER...PLUS OTHER MESOSCALE

FACTORS WHICH MAY INDUCE SNOW BANDING AND HIGHER SNOWFALL RATES.

THEREFORE...A WINTER STORM WATCH WILL BE ISSUED THIS MORNING FOR

AREAS NORTH OF A LINE FROM BENSON...TO HUTCHINSON TO FARIBAULT MN.

A FEW CTYS IN WEST CENTRAL WISCONSIN MAY BE MORE IN THE DRIER

ARCTIC AIR MASS SO...WILL KEEP BARRON...RUSK AND CHIPPEWA OUT OF

THE WATCH AT THIS TIME. THIS WAS ALSO COLLABORATED THRU ARX ON

THIS SCENARIO.

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