Region Specific Weather 1-6-17

Corn Belt weather:

  • High pressure is working into the Corn Belt this morning but there is still some light snow in the OH River valley.
  • The high is bringing cold air in with it and temps will drop into the single digits and below zero from today-Sunday, and the deep freeze will extend down to the I-80 to I-90 corridor across the Upper Midwest and western Corn Belt.
  • Winds turn to the south on Monday and temps will moderate as moisture will increase; clouds beging to buld into the western Corn Belt by Monday afternoon.
  • Lights snows break out by Monday night in MN and WI before a big low kicks out of the plains and into the western Corn Belt by Tuesday.
  • This will lead to overrunning precipitation north of I-80 on Tuesday in MI, WI, MN, and northern IA, but the circulation will keep the heaviest snows further north through the first part of Tuesday.
  • Later Tuesday-Wednesday, action begins to develop along the cold front that sweeps through IL, IN, and OH, with rain and thunderstorms possible in IL and IN, down through the mid-MS River valley totaling .25-1” of moisture.
  • Cold air comes in quickly behind the front but I’m not ready to call for rain changing to snow in a lot of areas.
  • There will be snow in WI and eastern IA, but the wildcard is IL as some areas see rain changing to snow, while IN and OH see all rain before it stops.
  • The cold air will include a clipper system bringing light snow to the Upper Midwest Wednesday night-Thursday before a minor low develops Thursday afternoon-Friday, bringing light rains to lower MI, IL, IN, OH, totaling .25” or less.
  • Cold air redevelops behind that second wave and bring better snow chances going into next weekend.
  • It’s an active pattern but the models have had trouble zeroing in on until you get into the 4-5 day period, so things are going to happen, but timing and amounts are a little up in the air.

 

Deep South weather:

  • A fairly stormy period is ahead for the Deep South as we have moisture developing just off the Gulf today and it’ll spread north and east across AL, GA, and SC through tonight as liquid precipitation, but the freezing line will be advancing farther south.
  • Light snow may be possible in north GA, eastern TN, and NC/SC, with the heaviest potential snowfall in NC and northern SC, where they could see several inches; 1-4” could even sneak down to Atlanta.
  • The western part of the Deep South will only see liquid precipitation as will areas to the south along the Gulf, including southern GA, FL, and even southern SC, where rains could total .25-1.25” of moisture.
  • This system does move away fairly quickly and high pressure builds in behind it quickly, already sitting over TN by Saturday night and clearing out skies across the Deep South, holding control until Monday.
  • A cold front is ready to move into western areas of the Deep South Tuesday afternoon, crossing the MS River valley Tuesday night-Wednesday morning, bringing scattered light rains showers totaling .25-.5” with coverage at 60% from Wednesday through Thursday.
  • A strong front will bring in thunderstorms late in the week over AR and LA through next Friday and extending through KY and TN.
  • Cold air will be advancing south so some of that moisture may end up changing to snow.
  • The front falls apart as it moves further east so MS, GA, AL, NC, and SC won’t see more than scattered showers over 40-50% of those areas, totaling .25” or less.
  • High pressure moves in next weekend with colder air again trying to sag south, which could mean scattered light precipitation around the 16-17.

 

Great Plains weather:

  • High pressure is building over the great plains right now, bringing sunshine to the northern plains today and holding everywhere through Sunday.
  • There is some moisture over TX and OK to start today but they fall apart, so the central and southern plains will be dry by late this afternoon.
  • Cold air is in play as zero degree temps are reaching through the northern half of the plains and the intermountain west.
  • South winds emerge on Sunday to moderate those cold temps to near normal to slightly above, with the zero degree line retreating to ND and SD.
  • Monday looks very dry and windy over most of the plains as low pressure moves into NE and KS, with some light snows possible in ND.
  • The biggest precipitation likely falls Tuesday-Wednesday with low pressure in southeast NE early Tuesday morning, with snow falling in SD and ND totaling several inches and strong winds keep the snow going through at least Tuesday night.
  • Wednesday-Thursday look mostly dry, except for scattered flurries in ND and SD on Wedensday night.
  • A secondary low moves into the central plains on Thursday but it won’t pick up good mositure until it’s in the western Corn Belt, but it will kick up strong gusty winds in the plains at midweek.
  • A strong arctic high moves in over the northern half of the plains on Friday, with temps pushing below zero in ND and SD, and the zero degree line pushes down to southern NE.
  • The central plains doesn’t see a lot of moisture until thunderstorms kick up in OK and TX on Friday-Saturday, but that’s part of a front that’s more impressive in the Corn Belt.
  • High pressure is then in contol for next weekend.
  • Temps in the plains will be a roller coaster, very cold to start before moderating over the weekend/early next week before bitter cold air moves back in by the end of next week.

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