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Are effing serious? NWS/Chicago calling for minimum temps as low as -38F with isolated -40F!!! This is absolutely incredible!!
Haha, I stepped outside and didn't expect it to be 6° before 9pm. Guess I'm going below 0 too but WTF to your temps. lol
2 maps...
Arctic front has crossed off the coast now.. Temps at 5000' are below 0°F now and that in turn is making the surface cold!
Surface temps
Zoomed out
Freeze Warning for Southeast Georgia and Northern Florida
Quote:
rea Forecast Discussion
National Weather Service Jacksonville FL
913 PM EST Tue Jan 29 2019
...FREEZE WARNING DURING THE PREDAWN AND EARLY MORNING HOURS FOR
SOUTHEAST GEORGIA AND INLAND NORTHEAST FLORIDA...
.Update...
Evening surface analysis depicts a cold front moving across
coastal southeast Georgia and entering northeast and north central
Florida from its recent passage through the Suwannee Valley. High
pressure (1026 millibars) was building into the lower Mississippi
Valley in the wake of this front. Meanwhile, a reinforcing arctic
cold front was pushing into the Ohio Valley and eastern Great
Lakes states from the Upper Midwest. Aloft...deep troughing
centered over the Great Lakes states was progressing slowly
eastward while digging into the southeastern states. Ridging
prevails over the western third of the nation. Nighttime infrared
imagery depicts a thinning band of stratus and stratocumulus
cloudiness in the immediate wake of the frontal boundary pushing
across our region, while high cloudiness is already increasing to
the west of our region as fast westerly flow prevails at the base
of the trough along the I-10 corridor. Temperatures in the wake
of the front were falling through the 40s over inland southeast
Georgia and the Suwannee Valley, while temperatures elsewhere
ahead of the front were in the 50s as of 02Z. Dewpoints were in
the 40s area-wide.
Cold air advection will overspread our region as the front moves
offshore and through our north central Florida counties before
midnight. Expect clearing skies from west to east after midnight,
and northwesterly winds will remain sustained in the 5-10 mph
range through the predawn hours, which will drive wind chill
temperatures down into the low to mid 20s across southeast Georgia
and the mid to upper 20s for most of northeast Florida by sunrise
as temperatures quickly tumble through the 30s. This will mostly
be a short duration advection freeze for southeast Georgia and
most of inland northeast Florida, where lows will fall to around
30. Lows elsewhere over north central and coastal northeast
Florida will fall to the mid and upper 30s. We are not expecting
much in the way of frost tonight with winds staying in the 5 mph
range or greater and dewpoints plunging through the 20s towards
sunrise. High cloudiness will then overspread our region for much
of the day on Wednesday, which will add an extra chill to the
already cold air mass that will be in place. Northerly winds will
increase to around 10 mph inland and 10-15 mph at the coast as our
local pressure gradient tightens due to arctic high pressure
building into the Tennessee and Ohio Valleys. Highs will generally
only reach the upper 40s to lower 50s, except a few mid 50 values
possible in north central Florida.
Looks to be coldest on Monday and Tuesday. Models are still up in the air regarding the surface low forecast to form on Sunday afternoon.
Looks like the snow will wind down for Metro Vancouver on Sunday night. Could continue thru Monday for you guys. In that case, you guys in Seattle have a good shot of a subfreezing high on Monday.
Up here in Vancouver, it looks to be sunny and quite cold after the initial shot of snow on Sunday. Temps possibly down below -10C on Monday night.
These cold outbreaks really delineate the plant hardiness zones of the North and South well.
Interesting factoid of the day for the Midwest- Coldest Wind Chill Value: Ely, MN coldest absolute wind chill, -31F with a 35mph sustained wind= -70F.
90F temperature swing in Black River Falls, WI over the next 3 days- Forecast Low Tonight: -45F, Forecast High Sunday: 45F.
Last edited by GraniteStater; 01-30-2019 at 07:45 PM..
What's crazy to me is how concentrated the arctic air is. Saw earlier this afternoon Nashville was in the mid 20s. That's not exceptional. I even remember Atlanta having a high in the mid 20s a few years back. Atlanta was around 40 and just gonna get warmer. But up in Chicago you had (I think) the coldest temps since the early 90s.
I was in SE Pennsylvania for grad school from Aug 15 to May 17. Coldest weekend we got had lows in the low/mid single digits. Two days in a row didn't break 17. Yet for this cold air, there's just tonight dropping to the low single digits, and a high just under 20. Again, exceptional cold in Chicago/Minneapolis, etc. but nothing record breaking by the time it gets to the east.
Minimum this morning around 8:00 was -5F. The forecast high was 8, but the temperature reached 3 at around 2-3pm (hours later than expected) and just hovered there as a quick 0.5" of snow fell. It's still 3F now. If it ends up being the official maximum at KCI, it'll be the coldest max since 1990, surpassing even the famous January 2014 outbreak's 4F max.
I also drove to Maryville, MO this morning. -11F there. I was surprised to find several inches of snow still on the ground there! It's nearly 100% melted in the KC area.
Lucky you. Here in the eastern part of the not-so-Great Lakes, we can't do anything right -21C was all the cold we could muster in Toronto
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-21C was all the cold we could muster in Toronto 
