NWS concerned about possible severe weather after midnight east of I-69

Concern has developed at the northern Indiana National Weather Service (NWS) office about a risk of severe weather east of Interstate 69 between midnight EDT tonight and 6 a.m. EDT tomorrow. Meteorologist have indicated there’s even a low chance of isolated tornadoes. Below is a series of tweets the NWS office sent this afternoon and evening. Heed the advice in these tweets, especially making sure that you’ll be awakened (e.g. by a NOAA Weather Radio) if dangerous weather pops up while you’re asleep.

See also the updated “Hazardous Weather Outlook” from 8:06 p.m. EDT that I pasted below the tweets.

For storm spotters who want to know the meteorology, here’s a relevant portion of an “Area Forecast Discussion:”

MODELS SUGGESTING A THREAT FOR LOW TOPPED SUPERCELLS OR SMALL BOWING SEGMENTS. IT NEEDS TO BE STRESSED THAT THIS IS A HIGHLY CONDITIONAL THREAT WITH A MARKED INCREASED IN DEWPTS AND BACKED FLOW BEING NEEDED TO INCREASE THE POTENTIAL.

Good old fashion hand analysis. Worried about severe weather overnight. pic.twitter.com/qF1qJYhbpF
— NWS Northern Indiana (@NWSIWX) May 14, 2014

We are concerned about severe weather potential including isolated tornadoes overnight east of I-69. #inwx pic.twitter.com/Y3yJRa5jdu
— NWS Northern Indiana (@NWSIWX) May 14, 2014

.@HDSweet99 Fort Wayne will be right on the western edge of the area of risk. It depends how far west the front moves.
— NWS Northern Indiana (@NWSIWX) May 14, 2014

If you live E of I-69 it is a good idea to make sure your NOAA Weather Radio is working before you go to bed tonight. Greatest risk 12a-6a
— NWS Northern Indiana (@NWSIWX) May 14, 2014

We have already discussed this evening who is available to come in overnight. Planning is especially important during an overnight event
— NWS Northern Indiana (@NWSIWX) May 14, 2014

The boundary that we are focused on has set up just east of Lima, Ohio at this time. We will need to continue to monitor if it moves west.
— NWS Northern Indiana (@NWSIWX) May 14, 2014

While we still have a small severe threat in a few counties in the SE don’t forget the flooding threat which covers a larger area.
— NWS Northern Indiana (@NWSIWX) May 14, 2014

Next batch of rain moving into the area. Another half an inch expected with this round.
— NWS Northern Indiana (@NWSIWX) May 14, 2014

High moisture content in the air tonight. This next round of precip has rain falling at a faster rate than earlier
— NWS Northern Indiana (@NWSIWX) May 15, 2014

These heavier rainfall rates are the reason for the flooding concern
— NWS Northern Indiana (@NWSIWX) May 15, 2014

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORTHERN INDIANA
806 PM EDT WED MAY 14 2014

INZ016>018-024>027-032>034-OHZ002-004-005-015-016-024-025-160015-
KOSCIUSKO-WHITLEY-ALLEN IN-WABASH-HUNTINGTON-WELLS-ADAMS-GRANT-
BLACKFORD-JAY-FULTON OH-DEFIANCE-HENRY-PAULDING-PUTNAM-VAN WERT-
ALLEN OH-
INCLUDING THE CITIES OF...WARSAW...WINONA LAKE...COLUMBIA CITY...
SOUTH WHITLEY...FORT WAYNE...WABASH...NORTH MANCHESTER...
HUNTINGTON...BLUFFTON...OSSIAN...DECATUR...BERNE...MARION...
HARTFORD CITY...MONTPELIER...PORTLAND...WAUSEON...ARCHBOLD...
DEFIANCE...NAPOLEON...PAULDING...ANTWERP...OTTAWA...PANDORA...
VAN WERT...DELPHOS...LIMA
806 PM EDT WED MAY 14 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OHIO AND
NORTHERN INDIANA.

.DAY ONE...TONIGHT

A FLOOD WATCH IS IN EFFECT TONIGHT. FOR THE LATEST...SEE THE
CURRENT FLOOD WATCH PRODUCT.

THERE IS A CHANCE OF THUNDERSTORMS TONIGHT...ESPECIALLY AFTER
MIDNIGHT. WHILE WIDESPREAD SEVERE WEATHER IS NOT EXPECTED THERE IS
A SLIGHT RISK FOR STRONG TO LOCALLY SEVERE STORMS LATER
TONIGHT...MAINLY ACROSS PORTIONS OF NORTHWESTERN OHIO. DAMAGING
WINDS WOULD BE THE PRIMARY CONCERN.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATER TONIGHT. IN ADDITION...REPORTS
OF FLOODING WOULD BE APPRECIATED.

&&

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR
CHECK OUR WEB SITE AT WEATHER.GOV/IWX