No more model talk, lets get these observations going!
Winter storm warnings from Mexico to Canada.
Here she comes! Detroit radar is out which may explain that hole over them.
.NEAR TERM /THROUGH THURSDAY/...
*** Winter Storm Warning in effect for the entire CWA ***
A cold front extends from Lake Huron down through the Lower Ohio
Valley and down into the far southern Plains late this morning.
Aloft a shortwave crossing the Plains, along with a digging
shortwave trough across the Southwest will aid in the formation
of several waves of low pressure along this cold front, with
each wave bringing a prolonged period of snow to our region.
By this afternoon, surface high pressure will slip to along the New
England coastline and this will allow for the slow moving upstream
cold front to begin to push into our western zones. Along this
lengthy cold front, both Gulf of Mexico and Pacific moisture will be
pushing northward towards the Great lakes Region. Initial
precipitation through the afternoon will be rain with a southerly
wind, though moisture overcoming a mid level dry wedge will keep
rainfall totals to less than a tenth of an inch. This combined with
still low dew points and not ripened snowpack should alleviate the
region from any flood concerns.
By this evening cooler air in the lower levels will build across the
Niagara Frontier/Saint Lawrence Valley and change the rain over to
snow, this on now a northwesterly flow. This will be the start of a
prolonged snow event, one without significant forcing, so more of a
light to moderate snow event.
Initial forcing looks to start as isentropic lift towards the west,
then transition to more convergent lift as an inverted surface
trough forms across our region. With this lift focused on western
zones, several inches of snow will be likely tonight across the Lake
Erie shoreline through the northern Niagara Frontier, as well as
through the Saint Lawrence Valley. The water content will be high at
the onset with sub 10:1 snow to liquid ratios as thermal profiles
are just below zero Celsius in the lower atmosphere.
Thursday the surface front will push towards the south and east with
sufficient cold air in the lower level building to support all snow.
As the cold air builds the initial wet snow will slowly become less
dense with greater snow to liquid ratios. There likely will be
breaks in the snow, especially towards the Finger Lakes region.
Given the weak forcing snowfall amounts through the day will range
from 3 to 6 inches. This combined with snow likely to increase later
Thursday Night will give confidence to upgrade the winter storm
watch to a winter storm warning for our entire region.
Winds will remain light from the northwest to north through the day
Thursday, with gusts up to 20 to 25 mph, greatly limited any blowing
snow.
It will be cooler Thursday with temperatures slowly falling through
the 20s.