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The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 447
NWS Storm Prediction Center Norman OK
735 PM CDT Sat Jun 22 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southern and Eastern Iowa
Northern and Western Illinois
Far Northwest Indiana
Northern Missouri
Lake Michigan
* Effective this Saturday night and Sunday morning from 735 PM
until 100 AM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph likely
Isolated large hail events to 1.5 inches in diameter possible
A tornado or two possible
SUMMARY...Thunderstorms occurring along and ahead of a cold front
should pose some threat for severe/damaging winds up to 60-70 mph
this evening while the move generally eastward. Isolated severe hail
around 1-1.5 inches in diameter also appears possible. A tornado or
two may occur in/near northern Illinois.
The severe thunderstorm watch area is approximately along and 55
statute miles north and south of a line from 30 miles south
southwest of Lamoni IA to 60 miles east northeast of Marseilles IL.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU7).
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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 446...
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
27035.
...Gleason
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW7
WW 447 SEVERE TSTM IA IL IN MO LM 230035Z - 230600Z
AXIS..55 STATUTE MILES NORTH AND SOUTH OF LINE..
30SSW LWD/LAMONI IA/ - 60ENE MMO/MARSEILLES IL/
..AVIATION COORDS.. 50NM N/S /62NNE MCI - 21SE ORD/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 27035.
LAT...LON 41009415 42498761 40908761 39419415
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.
Watch 447 Status Report Messages:
STATUS REPORT #3 ON WW 447
VALID 230445Z - 230540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SE IRK TO
15 NE BRL TO 30 SE RFD TO 50 SSE RAC.
..KERR..06/23/24
ATTN...WFO...DMX...DVN...LSX...LOT...ILX...EAX...
&&
STATUS REPORT FOR WS 447
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC001-009-011-037-043-057-063-067-071-089-091-093-095-099-105-
109-123-125-143-155-169-175-179-187-197-203-230540-
IL
. ILLINOIS COUNTIES INCLUDED ARE
ADAMS BROWN BUREAU
DE KALB DUPAGE FULTON
GRUNDY HANCOCK HENDERSON
KANE KANKAKEE KENDALL
KNOX LA SALLE LIVINGSTON
MCDONOUGH MARSHALL MASON
PEORIA PUTNAM SCHUYLER
STARK TAZEWELL WARREN
WILL WOODFORD
$$
INC089-230540-
IN
. INDIANA COUNTIES INCLUDED ARE
LAKE
$$
MOC111-127-205-230540-
MO
. MISSOURI COUNTIES INCLUDED ARE
LEWIS MARION SHELBY
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 447
VALID 230345Z - 230440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 ESE CDJ
TO 10 E IRK TO 25 WNW BRL TO 40 WSW RFD TO 20 SSE RAC.
..KERR..06/23/24
ATTN...WFO...DMX...DVN...LSX...LOT...ILX...EAX...
&&
STATUS REPORT FOR WS 447
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC001-009-011-031-037-043-057-063-067-071-073-089-091-093-095-
097-099-103-105-109-111-123-125-131-141-143-155-169-175-179-187-
195-197-203-230440-
IL
. ILLINOIS COUNTIES INCLUDED ARE
ADAMS BROWN BUREAU
COOK DE KALB DUPAGE
FULTON GRUNDY HANCOCK
HENDERSON HENRY KANE
KANKAKEE KENDALL KNOX
LAKE LA SALLE LEE
LIVINGSTON MCDONOUGH MCHENRY
MARSHALL MASON MERCER
OGLE PEORIA PUTNAM
SCHUYLER STARK TAZEWELL
WARREN WHITESIDE WILL
WOODFORD
$$
INC089-230440-
IN
. INDIANA COUNTIES INCLUDED ARE
LAKE
$$
IAC057-111-230440-
IA
. IOWA COUNTIES INCLUDED ARE
DES MOINES LEE
$$
MOC045-103-111-121-127-205-230440-
MO
. MISSOURI COUNTIES INCLUDED ARE
CLARK KNOX LEWIS
MACON MARION SHELBY
$$
LMZ740-741-742-230440-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
WINTHROP HARBOR TO WILMETTE HARBOR IL
WILMETTE HARBOR TO NORTHERLY ISLAND IL
NORTHERLY ISLAND TO CALUMET HARBOR IL
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 447
VALID 230230Z - 230340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 SW LWD TO
5 S OTM TO 30 NE OTM.
..KERR..06/23/24
ATTN...WFO...DMX...DVN...LSX...LOT...ILX...EAX...
&&
STATUS REPORT FOR WS 447
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC001-007-009-011-015-031-037-043-057-063-067-071-073-089-091-
093-095-097-099-103-105-109-111-123-125-131-141-143-155-161-169-
175-177-179-187-195-197-201-203-230340-
IL
. ILLINOIS COUNTIES INCLUDED ARE
ADAMS BOONE BROWN
BUREAU CARROLL COOK
DE KALB DUPAGE FULTON
GRUNDY HANCOCK HENDERSON
HENRY KANE KANKAKEE
KENDALL KNOX LAKE
LA SALLE LEE LIVINGSTON
MCDONOUGH MCHENRY MARSHALL
MASON MERCER OGLE
PEORIA PUTNAM ROCK ISLAND
SCHUYLER STARK STEPHENSON
TAZEWELL WARREN WHITESIDE
WILL WINNEBAGO WOODFORD
$$
INC089-230340-
IN
. INDIANA COUNTIES INCLUDED ARE
LAKE
$$
IAC007-031-045-051-057-087-101-103-107-111-115-139-163-177-183-
185-230340-
IA
. IOWA COUNTIES INCLUDED ARE
APPANOOSE CEDAR CLINTON
DAVIS DES MOINES HENRY
JEFFERSON JOHNSON KEOKUK
LEE LOUISA MUSCATINE
SCOTT VAN BUREN WASHINGTON
WAYNE
$$
MOC001-025-045-061-079-081-103-111-115-117-121-127-129-171-197-
199-205-211-230340-
MO
. MISSOURI COUNTIES INCLUDED ARE
ADAIR CALDWELL CLARK
DAVIESS GRUNDY HARRISON
KNOX LEWIS LINN
LIVINGSTON MACON MARION
MERCER PUTNAM SCHUYLER
SCOTLAND SHELBY SULLIVAN
$$
LMZ740-741-742-230340-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
WINTHROP HARBOR TO WILMETTE HARBOR IL
WILMETTE HARBOR TO NORTHERLY ISLAND IL
NORTHERLY ISLAND TO CALUMET HARBOR IL
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (20%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (10%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (10%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (70%)
|
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% (EF2-EF5 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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