Storms prompt tornado watches in Indiana - 13 WTHR Indianapolis

Storms prompt tornado watches in Indiana

Updated:
Photo: Ross Schoeller, Westfield Photo: Ross Schoeller, Westfield
Photo: Hannah Adcock Martinez, blown-down highway sign in Kokomo on US 31 Photo: Hannah Adcock Martinez, blown-down highway sign in Kokomo on US 31
INDIANAPOLIS -

A line of powerful storms swept through Indiana Thursday night, bringing high winds, hail, lightning and heavy rain. 

A severe thunderstorm warning was in effect until 10:00 pm EST for:

HANCOCK, HENRY, MADISON, RANDOLPH, RUSH
ADAMS, BLACKFORD, GRANT, HAMILTON, JAY, TIPTON, WELLS

I-65 is closed in Frankfort (Clinton County) after a semi overturned. The semi is leaking propane.

The following wind gusts were reported Thursday night:

60 mph in Brownsburg, along with pea-sized hail
65 mph in Tipton
58 mph in Indianapolis
70 mph in southwest Bloomington

A tornado watch issued for most of the area until midnight was canceled shortly before 10 p.m.

record_rain

The combination of melting snow and warm air aloft continues to produce very low visibility north of Indianapolis where snow pack is deeper.  

The flood threat remains high.  It should be noted that wind and gusts will remain very strong post-frontal passage with a tightening pressure gradient field as this storm nears "bombogenesis" status.

The image below (via WxBell) shows the pressure gradient (packed "black" lines) and wind field at ~4,000 feet.  These winds will occasionally "mix" down to the surface and produce gusts in excess of 45mph… which is why the Wind Advisory runs for most of Friday.

NAM4K_900MSLP

As mentioned many times this week, the warmth today is nothing more than a spring tease… with a return to an Arctic flow setting up next week.  This will pose timing problems for quick-moving upper disturbances that may trigger some snow.  The first of these features arrives sometime this weekend, possibly as early as Saturday afternoon.  While the GFS and Euro show only minor amounts of show, it should be noted the Canadian model (which has a done a decent job of late) shows more appreciable snow (>2-3″) moving through Sunday.

jetstream jetstream_2

 

7day

For now I'll leave with cold hard facts in the latest 7 day forecast.  Plenty of winter to endure as we truly earn our Spring Fever this year. 

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