All Weather News

Cold Core Funnel Clouds

17 May 2014, 12:47 pm

Yesterday, there were several sightings of funnel clouds in the Ohio River Valley.

COLD CORE PIC 2Normally, that would a big cause of concern due to the threat of tornadoes in the area.  But with an upper-level low pressure system moving over ahead, they cause more curiosity than panic.

COLD CORE PIC 3The cold core funnels can occur when you get a tightly wrapped rush of rising air that can appear as a funnel.   These funnels rarely touch the ground, and if they do, are extremely weak.  Basically the equivalent of an EF-O tornado (winds 65-85 mph) if they did touch down.  A warning may be issued for tornadic activity, but those are also rare.

IND HAILAreas across central Indiana saw hail come down in the form of tiny, pea-size ice stones, that were around a 0.25″ or so in diameter.

CUT OFF LOWThis kind of weather scenario can occur in the Spring and Fall when the jet stream is in the process of moving either north or south across the country, and sometimes it buckles.  When it does so, the jet stream allows a cold pocket of air to come down from Canada, and get nearly or completely pinched off from its usual spot.


This is how it looks at the surface, under the cut-off low pressure system.  Its usually a cloudy, cool, and “blah” kind of a day, with chilly winds coming from time to time, depending on where you are under the low.

TEMP TRENDSoon the cut-off low pressure system will be moving out of the picture, the skies will get brighter and the winds will diminish as a surface high pressure system moves in.  I know its been feeling very “late winter-like” across the Midwest lately, but soon temps will return to normal levels.  Here is how it looks out by the early portion of the work week.  Although, as that warm front, in the image above, moves across the upper Midwest, it’ll be kicking off showers and storms.  That is why portions of Minnesota and Wisconsin are in the “green shaded color” (Temps in the upper 50s to low 60s)

Enjoy the rest of your weekend!

Meteorologist Addison Green ~ Twitter: @agreenWNTV

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