The National Weather Service has issued a severe thunderstorm watch, in effect until 9 p.m. EDT, for much of northern Indiana and nearby states. It includes all of IMO SKYWARN quadrant two except for Blackford and Jay Counties. The verbatim watch announcement appears below.
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 495
NWS STORM PREDICTION CENTER NORMAN OK
305 PM EDT FRI SEP 5 2014
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN ILLINOIS
NORTHERN INDIANA
SOUTHERN AND EASTERN LOWER MICHIGAN
NORTHWEST OHIO
LAKE ERIE
LAKE HURON
LAKE MICHIGAN
* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 305 PM UNTIL
900 PM EDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY
ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES EAST
SOUTHEAST OF MOUNT CLEMENS MICHIGAN TO 65 MILES WEST OF
VALPARAISO INDIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
&&
DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE/STRENGTH ALONG
AND AHEAD OF ESE-MOVING COLD FRONT NOW APPROACHING THE WRN SUBURBS
OF CHICAGO AND WRN LWR MI. DEVELOPMENT ALSO MAY OCCUR ALONG
PRE-FRONTAL CONFLUENCE AXES AND LAKE BREEZE BOUNDARIES IN NRN IN/SRN
MI. BAND OF ELEVATED STORMS NOW FORMING E OF ROCKFORD IL MAY
INTENSIFY AS IT OUTPACES SFC COLD FRONT AND ENCOUNTERS GREATER
LOW-LVL INSTABILITY IN THE CHICAGO AREA OVER THE NEXT 1-2 HRS. THESE
STORMS...AND THOSE FORMING FARTHER E...WILL HAVE A TENDENCY TO
ORGANIZE INTO N-S LINES. ASSOCIATED EMBEDDED BOWS WILL POSE A RISK
FOR DMGG WIND AND POSSIBLY SVR HAIL THOUGH EARLY TNGT GIVEN VERY
WARM/MOIST LOW-LVL ENVIRONMENT...RESIDUAL EML...AND 35+ KT WSWLY
UNIDIRECTIONAL 700-500 MB FLOW.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 26035.
BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 495 NWS STORM PREDICTION CENTER NORMAN OK 305 PM EDT FRI SEP 5 2014 SEVERE THUNDERSTORM WATCH 495 IS IN EFFECT UNTIL 900 PM EDT FOR THE FOLLOWING LOCATIONS ILC031-043-053-063-075-089-091-093-097-105-197-060100- /O.NEW.KWNS.SV.A.0495.140905T1905Z-140906T0100Z/ IL . ILLINOIS COUNTIES INCLUDED ARE COOK DUPAGE FORD GRUNDY IROQUOIS KANE KANKAKEE KENDALL LAKE LIVINGSTON WILL INC001-003-007-017-033-039-049-069-073-085-087-089-091-099-103- 111-113-127-131-141-149-151-169-179-181-183-060100- /O.NEW.KWNS.SV.A.0495.140905T1905Z-140906T0100Z/ IN . INDIANA COUNTIES INCLUDED ARE ADAMS ALLEN BENTON CASS DE KALB ELKHART FULTON HUNTINGTON JASPER KOSCIUSKO LAGRANGE LAKE LA PORTE MARSHALL MIAMI NEWTON NOBLE PORTER PULASKI ST. JOSEPH STARKE STEUBEN WABASH WELLS WHITE WHITLEY MIC005-015-021-023-025-027-037-045-049-057-059-063-065-067-075- 077-087-091-093-099-115-125-145-147-149-151-155-157-159-161-163- 060100- /O.NEW.KWNS.SV.A.0495.140905T1905Z-140906T0100Z/ MI . MICHIGAN COUNTIES INCLUDED ARE ALLEGAN BARRY BERRIEN BRANCH CALHOUN CASS CLINTON EATON GENESEE GRATIOT HILLSDALE HURON INGHAM IONIA JACKSON KALAMAZOO LAPEER LENAWEE LIVINGSTON MACOMB MONROE OAKLAND SAGINAW SANILAC SHIAWASSEE ST. CLAIR ST. JOSEPH TUSCOLA VAN BUREN WASHTENAW WAYNE OHC003-039-043-051-063-069-077-095-123-125-137-143-147-161-171- 173-060100- /O.NEW.KWNS.SV.A.0495.140905T1905Z-140906T0100Z/ OH . OHIO COUNTIES INCLUDED ARE ALLEN DEFIANCE ERIE FULTON HANCOCK HENRY HURON LUCAS OTTAWA PAULDING PUTNAM SANDUSKY SENECA VAN WERT WILLIAMS WOOD