Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 41
NWS STORM PREDICTION CENTER NORMAN OK
150 PM CDT THU APR 9 2015
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* TORNADO WATCH FOR PORTIONS OF
NORTHERN AND CENTRAL ILLINOIS
FAR NORTHWEST INDIANA
FAR SOUTHERN WISCONSIN
LAKE MICHIGAN
* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 150 PM UNTIL
1100 PM CDT.
* PRIMARY THREATS INCLUDE...
A FEW TORNADOES LIKELY WITH A COUPLE INTENSE TORNADOES POSSIBLE
SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
TO 80 MPH POSSIBLE
SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5
INCHES IN DIAMETER POSSIBLE
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHWEST OF
MILWAUKEE WISCONSIN TO 25 MILES SOUTHWEST OF DECATUR ILLINOIS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 39...WW 40...
DISCUSSION...TWO ROUNDS OF SEVERE CONVECTION ARE EXPECTED WITH
INITIAL STORMS IN CENTRAL ILLINOIS DEVELOPING E/NE AND ADDITIONAL
STORMS ALONG A FRONTAL ZONE. BOTH AREAS WILL HAVE STRONG DEEP-LAYER
SHEAR SUPPORTING RISKS FOR A FEW TORNADOES...LARGE HAIL AND DAMAGING
WINDS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24040.
...GRAMS/CORFIDI
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 41 TORNADO IL IN WI LM 091850Z - 100400Z
AXIS..80 STATUTE MILES EAST AND WEST OF LINE..
15NW MKE/MILWAUKEE WI/ - 25SW DEC/DECATUR IL/
..AVIATION COORDS.. 70NM E/W /8E BAE - 19WSW AXC/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..70 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24040.
LAT...LON 43098651 39568769 39569069 43098969
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 41 Status Report Messages:
STATUS REPORT #2 ON WW 41
VALID 092340Z - 100040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 259
..GUYER..04/09/15
ATTN...WFO...LOT...DVN...ILX...MKX...IWX...GRR...
&&
STATUS REPORT FOR WT 41
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC007-011-017-019-021-031-037-039-043-053-057-063-075-089-091-
093-095-097-099-103-105-107-111-113-115-123-125-129-137-141-143-
147-155-167-169-171-175-179-183-197-201-203-100040-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BOONE BUREAU CASS
CHAMPAIGN CHRISTIAN COOK
DE KALB DE WITT DUPAGE
FORD FULTON GRUNDY
IROQUOIS KANE KANKAKEE
KENDALL KNOX LAKE
LA SALLE LEE LIVINGSTON
LOGAN MCHENRY MCLEAN
MACON MARSHALL MASON
MENARD MORGAN OGLE
PEORIA PIATT PUTNAM
SANGAMON SCHUYLER SCOTT
STARK TAZEWELL VERMILION
WILL WINNEBAGO WOODFORD
$$
INC007-073-089-111-127-100040-
IN
. INDIANA COUNTIES INCLUDED ARE
BENTON JASPER LAKE
NEWTON PORTER
$$
WIC045-055-059-079-101-105-127-133-100040-
WI
. WISCONSIN COUNTIES INCLUDED ARE
GREEN JEFFERSON KENOSHA
MILWAUKEE RACINE ROCK
WALWORTH WAUKESHA
$$
LMZ080-645-646-675-740-741-742-743-744-745-777-779-876-878-
100040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
LAKE MICHIGAN MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO
MID-LINE OF LAKE.
NORTH POINT LIGHT TO WIND POINT WI
WIND POINT WI TO WINTHROP HARBOR IL
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5NM
OFFSHORE TO MID LAKE
WINTHROP HARBOR TO WILMETTE HARBOR IL
WILMETTE HARBOR TO NORTHERLY ISLAND IL
NORTHERLY ISLAND TO CALUMET HARBOR IL
CALUMET HARBOR IL TO GARY IN
GARY TO BURNS HARBOR IN
BURNS HARBOR TO MICHIGAN CITY IN
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5NM OFFSHORE TO MID
LAKE
LAKE MICHIGAN FROM ST JOSEPH TO SOUTH HAVEN MI 5NM OFFSHORE TO
MID LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 41
VALID 092030Z - 092140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 251
..COOK..04/09/15
ATTN...WFO...LOT...DVN...ILX...MKX...IWX...GRR...
&&
STATUS REPORT FOR WT 41
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC007-011-017-019-021-031-037-039-043-053-057-063-075-089-091-
093-095-097-099-103-105-107-111-113-115-123-125-129-137-141-143-
147-155-167-169-171-175-179-183-197-201-203-092140-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BOONE BUREAU CASS
CHAMPAIGN CHRISTIAN COOK
DE KALB DE WITT DUPAGE
FORD FULTON GRUNDY
IROQUOIS KANE KANKAKEE
KENDALL KNOX LAKE
LA SALLE LEE LIVINGSTON
LOGAN MCHENRY MCLEAN
MACON MARSHALL MASON
MENARD MORGAN OGLE
PEORIA PIATT PUTNAM
SANGAMON SCHUYLER SCOTT
STARK TAZEWELL VERMILION
WILL WINNEBAGO WOODFORD
$$
INC007-073-089-111-127-092140-
IN
. INDIANA COUNTIES INCLUDED ARE
BENTON JASPER LAKE
NEWTON PORTER
$$
WIC045-055-059-079-101-105-127-133-092140-
WI
. WISCONSIN COUNTIES INCLUDED ARE
GREEN JEFFERSON KENOSHA
MILWAUKEE RACINE ROCK
WALWORTH WAUKESHA
$$
LMZ080-645-646-675-740-741-742-743-744-745-777-779-876-878-
092140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
LAKE MICHIGAN MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO
MID-LINE OF LAKE.
NORTH POINT LIGHT TO WIND POINT WI
WIND POINT WI TO WINTHROP HARBOR IL
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5NM
OFFSHORE TO MID LAKE
WINTHROP HARBOR TO WILMETTE HARBOR IL
WILMETTE HARBOR TO NORTHERLY ISLAND IL
NORTHERLY ISLAND TO CALUMET HARBOR IL
CALUMET HARBOR IL TO GARY IN
GARY TO BURNS HARBOR IN
BURNS HARBOR TO MICHIGAN CITY IN
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5NM OFFSHORE TO MID
LAKE
LAKE MICHIGAN FROM ST JOSEPH TO SOUTH HAVEN MI 5NM OFFSHORE TO
MID LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (60%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Mod (40%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (40%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (>95%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
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