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March 7th-9th Potential Storm


wisconsinwx

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MKE is going with the blend of the models.

Here is the AFD from MKE:

PRECIPITATION TYPE REMAINS A CHALLENGE FOR TUESDAY NIGHT...THOUGH

PROBABILITY OF PRECIPITATION IS HIGHER. DRY FOR MOST OF THE DAY WITH

HIGH PRESSURE TO THE NORTH...AND SURFACE CYCLOGENESIS OVER THE

SOUTHERN PLAINS. EASTERLY WINDS WILL HOLD TEMPS IN THE EAST TO THE

MID TO UPPER 30S...WHILE WESTERN LOCATIONS WILL WARM TO AROUND 40

MID DAY WITH SOME FILTERED SUNSHINE. TEMPS STEADY OR SLOWLY COOL

AFTER 18Z TUESDAY WITH STRENGTHENING EAST WINDS AND INCREASING

CLOUD COVER AHEAD OF APPROACHING LOW.

HAVE UPPED POPS TO CATEGORICAL FOR TUESDAY NIGHT WITH DEEP LAYER

Q-VECTOR CONVERGENCE FROM COMBINATION OF WARM AIR ADVECTION AND CVA

WITH MAIN VORT MAX TARGETING SOUTHERN WISCONSIN. GFS HAS MADE STEADY

PROGRESS NORTH WITH TRACK OF SURFACE LOW...CLOSER TO ECMWF THOUGH

STILL A BIT SLOWER. WILL GO WITH A MODEL BLEND THAT BRINGS RAIN TO

START IN THE SOUTH HALF OF THE CWA...WITH A MIX TO THE

NORTH...GRADUALLY CHANGING TO ALL SNOW NORTHWEST TWO-THIRDS AND A

RAIN/SNOW MIX SOUTHEAST THIRD BASED ON THICKNESSES AND MODEL

SOUNDINGS...WITH A CHANGE BACK TO ALL RAIN TOWARDS WEDNESDAY

MORNING IN THE FAR SOUTHEAST AS LOW MOVES INTO NW IL/SW WI.

.LONG TERM...WEDNESDAY THROUGH SATURDAY...FORECAST CONFIDENCE LOW

TO MEDIUM.

BLENDED TRACK OF SURFACE LOW TAKES IT ACROSS NRN IL AND FAR SRN/SE

WI...WITH THE 12Z ECMWF A BIT FASTER AND FARTHER NORTH THAN 12Z

GFS...WITH 12Z CANADIAN THE FURTHEST SOUTH AND ABOUT 6 HOURS SLOWER.

PRECIPITATION WILL CHANGE OVER TO ALL RAIN FOR MOST OF SRN HALF OF

FORECAST AREA AND A RAIN SNOW MIX ELSEWHERE WEDNESDAY MORNING...WITH

HIGH TEMPS REACHED AROUND 18Z...THEN BACK TO A RAIN/SNOW MIX

EVERYWHERE IN THE AFTERNOON WITH COLDER AIR SPREADING IN BEHIND LOW.

POTENTIAL EXISTS FOR A HEADLINE EVENT...BUT TOO MUCH UNCERTAINTY TO

TRACK OF SFC LOW/MID LEVEL FEATURES THAT WILL PLAY A HUGE FACTOR IN

THE THERMAL SET UP FOR PRECIPITATION TYPE AND RESULTANT SNOW TOTALS.

NORTHERN 1/4 OF FORECAST AREA STILL HAVING BEST CHANCE OF HIGHEST

SNOW TOTALS...ESPECIALLY IN THE FAR NORTHWEST.

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I'm sure a met could provide a better answer but look at the trough...it's pretty amplified and trying to go negative tilt. Surface lows tend to get pulled farther north in that situation.

Also seems like most models have about a 1028 mb high pressure to the north/nne, not exactly the dominating 1040 and 1050 we've seen earlier this year so its not as effective at suppressing systems as those stronger highs were.

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MKE is going with the blend of the models.

Here is the AFD from MKE:

PRECIPITATION TYPE REMAINS A CHALLENGE FOR TUESDAY NIGHT...THOUGH

PROBABILITY OF PRECIPITATION IS HIGHER. DRY FOR MOST OF THE DAY WITH

HIGH PRESSURE TO THE NORTH...AND SURFACE CYCLOGENESIS OVER THE

SOUTHERN PLAINS. EASTERLY WINDS WILL HOLD TEMPS IN THE EAST TO THE

MID TO UPPER 30S...WHILE WESTERN LOCATIONS WILL WARM TO AROUND 40

MID DAY WITH SOME FILTERED SUNSHINE. TEMPS STEADY OR SLOWLY COOL

AFTER 18Z TUESDAY WITH STRENGTHENING EAST WINDS AND INCREASING

CLOUD COVER AHEAD OF APPROACHING LOW.

HAVE UPPED POPS TO CATEGORICAL FOR TUESDAY NIGHT WITH DEEP LAYER

Q-VECTOR CONVERGENCE FROM COMBINATION OF WARM AIR ADVECTION AND CVA

WITH MAIN VORT MAX TARGETING SOUTHERN WISCONSIN. GFS HAS MADE STEADY

PROGRESS NORTH WITH TRACK OF SURFACE LOW...CLOSER TO ECMWF THOUGH

STILL A BIT SLOWER. WILL GO WITH A MODEL BLEND THAT BRINGS RAIN TO

START IN THE SOUTH HALF OF THE CWA...WITH A MIX TO THE

NORTH...GRADUALLY CHANGING TO ALL SNOW NORTHWEST TWO-THIRDS AND A

RAIN/SNOW MIX SOUTHEAST THIRD BASED ON THICKNESSES AND MODEL

SOUNDINGS...WITH A CHANGE BACK TO ALL RAIN TOWARDS WEDNESDAY

MORNING IN THE FAR SOUTHEAST AS LOW MOVES INTO NW IL/SW WI.

.LONG TERM...WEDNESDAY THROUGH SATURDAY...FORECAST CONFIDENCE LOW

TO MEDIUM.

BLENDED TRACK OF SURFACE LOW TAKES IT ACROSS NRN IL AND FAR SRN/SE

WI...WITH THE 12Z ECMWF A BIT FASTER AND FARTHER NORTH THAN 12Z

GFS...WITH 12Z CANADIAN THE FURTHEST SOUTH AND ABOUT 6 HOURS SLOWER.

PRECIPITATION WILL CHANGE OVER TO ALL RAIN FOR MOST OF SRN HALF OF

FORECAST AREA AND A RAIN SNOW MIX ELSEWHERE WEDNESDAY MORNING...WITH

HIGH TEMPS REACHED AROUND 18Z...THEN BACK TO A RAIN/SNOW MIX

EVERYWHERE IN THE AFTERNOON WITH COLDER AIR SPREADING IN BEHIND LOW.

POTENTIAL EXISTS FOR A HEADLINE EVENT...BUT TOO MUCH UNCERTAINTY TO

TRACK OF SFC LOW/MID LEVEL FEATURES THAT WILL PLAY A HUGE FACTOR IN

THE THERMAL SET UP FOR PRECIPITATION TYPE AND RESULTANT SNOW TOTALS.

NORTHERN 1/4 OF FORECAST AREA STILL HAVING BEST CHANCE OF HIGHEST

SNOW TOTALS...ESPECIALLY IN THE FAR NORTHWEST.

I saw that, and that's definitely what you have to go with atm.

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Also seems like most models have about a 1028 mb high pressure to the north/nne, not exactly the dominating 1040 and 1050 we've seen earlier this year so its not as effective at suppressing systems as those stronger highs were.

The interesting thing about that statement is, if the stronger high idea were to reappear the system would not only have a better chance of shifting SE (correct me if I'm wrong) but, even with a weaker low, would have a stronger gradient due to the stronger high. Thus, even if the system were further south or weaker, it still could have the same snow/wind impacts it would with a further NW track. Let me know if I'm off base with this thought.

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I'd agree but its scary how consistent the models have been on the track, yes the system is still out in the pacific but I think north and west of us will be the winners.

The track is probably close to what will happen but still gotta wait a few days to see the trends on thermal profiles especially for borderline areas like MKE. Another thing to watch for will be what happens when the low occludes, some places might get a changeover to some snow..

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any new thoughts on track or anything?

btw, how did the balloon launch go?

Well I am still not upper air certified--not close unfortunately. I did get to launch the balloon today with a lot of oversight by the OPL.

First sounding I have taken part in and launched:

http://www.spc.noaa.gov/exper/soundings/11030512_OBS/LBF.gif

I will say launching a balloon is a lot more involved then one may think--the manuals involved with it are rather expansive and lengthy.

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You'll get snow...just a question of how much.

Yeah not likely... Talking anything of importance..

Hey - if you guys want to wait around and think this thing will become more favorable for us in the south more power to ya. I've seen all I have to to know this isn't going to end well and after feb. 20th I'll be dammed if I'm duped again into thinking its possible to get a small shift south.

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Yeah not likely... Talking anything of importance..

Hey - if you guys want to wait around and think this thing will become more favorable for us in the south more power to ya. I've seen all I have to to know this isn't going to end well and after feb. 20th I'll be dammed if I'm duped again into thinking its possible to get a small shift south.

Can we pull it off? Sure. But is that the likely outcome? Probably not. We have a god awful Pacific ( for those farther se ) for starters. In winter we can fight it at times but this time of year? Ha. We need a little help via Canada and that crappy azz Pacific is locking it up. Leaves us with two options. 1. A system that closes off completely that can stay on a more easterly course along or near i70 a bit farther south for here and a little bit north of you. 2. A system coming into Texas alot farther to the south that turns NNE when reaching the MS river or just east of there and or a Gulf low AND more importantly it HAS to be strengthening and thus not another one of these POS garbage lows that are weakening/weak like we have currently. Sorry but these weakening systems are not it. It is amazing how many of these we see too every winter. far too many shoot their load too quick. One of the things i do miss about living by the coast as the ocean kinda helps avoid that crap. Just have to fight the rn/sn line more often but it atleast usually pays off with a nice biggie every so many years unlike this place which can go decades without a decent payoff. lol

Basically we need alot to happen. Like you i am not even thinking about hoping for something that has a very slim chance of happening. This is not our winter and i don't see that changing now. I'll still watch it though.

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Can we pull it off? Sure. But is that the likely outcome? Probably not. We have a god awful Pacific ( for those farther se ) for starters. In winter we can fight it at times but this time of year? Ha. We need a little help via Canada and that crappy azz Pacific is locking it up. Leaves us with two options. 1. A system that closes off completely that can stay on a more easterly course along or near i70 a bit farther south for here and a little bit north of you. 2. A system coming into Texas alot farther to the south that turns NNE when reaching the MS river or just east of there and or a Gulf low AND more importantly it HAS to be strengthening and thus not another one of these POS garbage lows that are weakening/weak like we have currently. Sorry but these weakening systems are not it. It is amazing how many of these we see too every winter. far too many shoot their load too quick. One of the things i do miss about living by the coast as the ocean kinda helps avoid that crap. Just have to fight the rn/sn line more often but it atleast usually pays off with a nice biggie every so many years unlike this place which can go decades without a decent payoff. lol

Basically we need alot to happen. Like you i am not even thinking about hoping for something that has a very slim chance of happening. This is not our winter and i don't see that changing now. I'll still watch it though.

We'll get one before the year ends. One at hour 200 looks interesting.

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