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Feb. 20th - ? Possible Storm


wisconsinwx

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IWX has been riding the fence down here for several days (a very good idea), and downplaying any potential:

Sunday: A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 30%.

Sunday Night: A chance of rain and snow. Cloudy, with a low around 31. Chance of precipitation is 40%.

Washington's Birthday: A chance of rain. Cloudy, with a high near 44. Chance of precipitation is 40%.

Monday Night: A chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 40%.

Tuesday: A chance of rain and snow. Mostly cloudy, with a high near 40.

The long term forecaster mentions that the "00z models came in a little cooler", a nod to the Euro I suspect.

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DVN

THIS WEEKEND INTO EARLY NEXT WEEK...CONFIDENCE HAS PLUNGED WITH

REGARD TO PRECIPITATION TYPE WITH THE ARRIVAL OF THE 00Z ECM.

CONFIDENCE IS HIGH THAT THERE WILL BE A SIGNIFICANT SYSTEM IMPACTING

THE MIDWEST SUNDAY AND MONDAY. THE 00Z ECM HAS COME IN MUCH COLDER

WITH THE SURFACE LOW MOVING SOUTH OF THE CWA WITH A MAJOR SNOWSTORM

NOW INDICATED FOR MUCH OF THE DVN CWA SUNDAY AND MONDAY. WHILE THE

ECM HAS BEEN THE COLDER MODEL THE PAST SEVERAL RUNS THIS SEEMS TO BE

RADICALLY COLDER. AFTER COORDINATION WITH SURROUNDING OFFICES WILL

STAY THE COURSE WITH MAINLY A RAIN EVENT FOR NOW AND SEE IF OTHER

MODELS COME IN LINE WITH THE 00Z ECM. OR WILL THE 12Z ECM GO BACK TO

THE WARMER SOLUTION. NCEP DISCUSSIONS SUGGEST BECAUSE THE SYSTEM IS

COMING OUT SOMEWHAT SLOWER THE COLDER AIR WILL PLUNGE INTO THE

MIDWEST FIRST AHEAD OF THE STORM SYSTEM. SO THEY FAVOR THE 00Z ECM.

BOTTOM LINE...EITHER WE WILL HAVE MODERATE TO HEAVY SNOW FOR ALL OR

PORTIONS OF THE DVN CWA...OR WE WILL HAVE MODERATE TO HEAVY RAIN FOR

ALL OR PORTIONS OF THE CWA WITH SIGNIFICANT IMPACTS TO THE RIVERS.

THE FARTHER NORTH TRACK WOULD ALSO FAVOR AT LEAST ISOLATED TO

SCATTERED THUNDERSTORMS. EVEN THE COLDER ECM WOULD SUGGEST

THUNDERSNOWS WITH SUCH A STRONG THERMAL GRADIENT. GFS/ECM HINT AT

ANOTHER STRONG SYSTEM AFFECTING THE MIDWEST LATE NEXT WEEK.

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DVN

THIS WEEKEND INTO EARLY NEXT WEEK...CONFIDENCE HAS PLUNGED WITH

REGARD TO PRECIPITATION TYPE WITH THE ARRIVAL OF THE 00Z ECM.

CONFIDENCE IS HIGH THAT THERE WILL BE A SIGNIFICANT SYSTEM IMPACTING

THE MIDWEST SUNDAY AND MONDAY. THE 00Z ECM HAS COME IN MUCH COLDER

WITH THE SURFACE LOW MOVING SOUTH OF THE CWA WITH A MAJOR SNOWSTORM

NOW INDICATED FOR MUCH OF THE DVN CWA SUNDAY AND MONDAY. WHILE THE

ECM HAS BEEN THE COLDER MODEL THE PAST SEVERAL RUNS THIS SEEMS TO BE

RADICALLY COLDER. AFTER COORDINATION WITH SURROUNDING OFFICES WILL

STAY THE COURSE WITH MAINLY A RAIN EVENT FOR NOW AND SEE IF OTHER

MODELS COME IN LINE WITH THE 00Z ECM. OR WILL THE 12Z ECM GO BACK TO

THE WARMER SOLUTION. NCEP DISCUSSIONS SUGGEST BECAUSE THE SYSTEM IS

COMING OUT SOMEWHAT SLOWER THE COLDER AIR WILL PLUNGE INTO THE

MIDWEST FIRST AHEAD OF THE STORM SYSTEM. SO THEY FAVOR THE 00Z ECM.

BOTTOM LINE...EITHER WE WILL HAVE MODERATE TO HEAVY SNOW FOR ALL OR

PORTIONS OF THE DVN CWA...OR WE WILL HAVE MODERATE TO HEAVY RAIN FOR

ALL OR PORTIONS OF THE CWA WITH SIGNIFICANT IMPACTS TO THE RIVERS.

THE FARTHER NORTH TRACK WOULD ALSO FAVOR AT LEAST ISOLATED TO

SCATTERED THUNDERSTORMS. EVEN THE COLDER ECM WOULD SUGGEST

THUNDERSNOWS WITH SUCH A STRONG THERMAL GRADIENT. GFS/ECM HINT AT

ANOTHER STRONG SYSTEM AFFECTING THE MIDWEST LATE NEXT WEEK.

You can always count on DVN to feed the weenies. It's always hard going against the euro, but this one still looks like almost entirely rain for N. Illinois to me.

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Yeap... That was a surprise on the EURO lol I haven't been paying much attention over the past few days because each system looked warm and wet with little snow and severe weather threat. May have to start model watching again..

Yeah will be interesting if the 12z run holds to the icy idea.

All I could find:

SENIOR DUTY METEOROLOGIST NWS ADMINISTRATIVE MESSAGE

NWS NCEP CENTRAL OPERATIONS CAMP SPRINGS MD

1548Z WED FEB 16 2011

THE 12Z NAM COMPLETED ON TIME.

THE GFS HAS NOT BEGAN AND WILL BE LATE.

IT WILL BEGIN WITH 32 CANADIAN...14 MEXICAN AND 9 CARIBBEAN

STATIONS AVBL FOR INGEST. THERE WERE ALSO 24 DROPSONDES RECEIVED

FROM THE AIR FORCE C-130 AIRCRAFT BASED OUT OF ANCHORAGE AK AND

THE NOAA G-IV BASED OUT OF JAPAN.

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Not sure if anyone cares about what JB has to say but this was found on his twitter page.

Early week storm will be farther south over the east than US models. Forecasts in east should trend colder and snowier with that.

I-80 follies: DSM 60s tomorrow, snow Sun night into Mon. NYC 60s Friday, snow Mon night into Tue.

Aforementioned storm will be worse in the plains and lower lakes than when it gets to the east, but still shows where this pattern is going.

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Not sure if anyone cares about what JB has to say but this was found on his twitter page.

Early week storm will be farther south over the east than US models. Forecasts in east should trend colder and snowier with that.

I-80 follies: DSM 60s tomorrow, snow Sun night into Mon. NYC 60s Friday, snow Mon night into Tue.

Aforementioned storm will be worse in the plains and lower lakes than when it gets to the east, but still shows where this pattern is going.

And this from his blog:

Where it will be a nasty storm in Nebraska into the western Great Lakes, where winter is far from over

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Cool. I guess its ok to resume construction on the JB bomb shelter. JB's had a really, really rough winter.

His checking account doesn't believe so and thats what really matters. He's had his good moments and bad moments. I still think he's better than anyone else at accuwx.

Southern minneosta gets destroyed on the GGEM. Looks like the further east you are, the less snow.

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His checking account doesn't believe so and thats what really matters. He's had his good moments and bad moments. I still think he's better than anyone else at accuwx.

Southern minneosta gets destroyed on the GGEM. Looks like the further east you are, the less snow.

Getting surpressed as it heads east. This keeps it from being a cutter and more of a west to east storm.

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wow big step south from its previous runs.

any chance you could throw up the 850 temp maps and a total qpf?

hmmm, still looks sketchy here but my confidence in an all rain scenario is shrinking. You have to imagine we start seeing increasing agreement before too long here. Going to be some real cement for who ever stays all snow.

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hmmm, still looks sketchy here but my confidence in an all rain scenario is shrinking. You have to imagine we start seeing increasing agreement before too long here. Going to be some real cement for who ever stays all snow.

not saying JB is god but with his comments and the GEM shifting south I'm a bit more optimistic here for seeing snow.

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