Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 350
NWS Storm Prediction Center Norman OK
340 PM CDT Thu Jul 9 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northern Illinois
Southern Wisconsin
Lake Michigan
* Effective this Thursday afternoon and evening from 340 PM until
1100 PM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
A tornado or two possible
SUMMARY...Scattered clusters of storms will move east-northeastward
across southern Wisconsin and northern Illinois through this
evening. Damaging winds are the primary hazard.
The severe thunderstorm watch area is approximately along and 95
statute miles north and south of a line from 55 miles west of
Rockford IL to 30 miles east of Janesville WI. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).
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 348...WW 349...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
cumulonimbi with maximum tops to 550. Mean storm motion vector
24020.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 350 SEVERE TSTM IL WI LM 092040Z - 100400Z
AXIS..95 STATUTE MILES NORTH AND SOUTH OF LINE..
55W RFD/ROCKFORD IL/ - 30E JVL/JANESVILLE WI/
..AVIATION COORDS.. 85NM N/S /27ESE DBQ - 31SSW BAE/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 24020.
LAT...LON 43579017 43998844 41248844 40829017
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 350 Status Report Messages:
STATUS REPORT #3 ON WW 350
VALID 100045Z - 100140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNE MLI
TO 15 SSE MSN TO 20 SSE OSH TO 25 NNE MKE.
..LYONS..07/10/20
ATTN...WFO...LOT...DVN...ILX...MKX...
&&
STATUS REPORT FOR WS 350
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC007-011-073-095-103-123-141-143-155-175-177-195-201-203-
100140-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BOONE BUREAU HENRY
KNOX LEE MARSHALL
OGLE PEORIA PUTNAM
STARK STEPHENSON WHITESIDE
WINNEBAGO WOODFORD
$$
WIC027-055-059-079-089-101-105-127-131-133-100140-
WI
. WISCONSIN COUNTIES INCLUDED ARE
DODGE JEFFERSON KENOSHA
MILWAUKEE OZAUKEE RACINE
ROCK WALWORTH WASHINGTON
WAUKESHA
$$
LMZ644-645-646-100140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
PORT WASHINGTON TO NORTH POINT LIGHT WI
NORTH POINT LIGHT TO WIND POINT WI
WIND POINT WI TO WINTHROP 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 #2 ON WW 350
VALID 092330Z - 100040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ENE DBQ
TO 30 W OSH.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1162
..LYONS..07/09/20
ATTN...WFO...LOT...DVN...ILX...MKX...
&&
STATUS REPORT FOR WS 350
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC007-011-015-073-095-103-123-141-143-155-175-177-195-201-203-
100040-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BOONE BUREAU CARROLL
HENRY KNOX LEE
MARSHALL OGLE PEORIA
PUTNAM STARK STEPHENSON
WHITESIDE WINNEBAGO WOODFORD
$$
WIC021-025-027-039-045-047-055-059-065-079-089-101-105-117-127-
131-133-100040-
WI
. WISCONSIN COUNTIES INCLUDED ARE
COLUMBIA DANE DODGE
FOND DU LAC GREEN GREEN LAKE
JEFFERSON KENOSHA LAFAYETTE
MILWAUKEE OZAUKEE RACINE
ROCK SHEBOYGAN WALWORTH
WASHINGTON WAUKESHA
$$
LMZ643-644-645-646-100040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
SHEBOYGAN TO PORT WASHINGTON WI
PORT WASHINGTON TO NORTH POINT LIGHT WI
NORTH POINT LIGHT TO WIND POINT WI
WIND POINT WI TO WINTHROP 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 350
VALID 092155Z - 092240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..LYONS..07/09/20
ATTN...WFO...LOT...DVN...ILX...MKX...
&&
STATUS REPORT FOR WS 350
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC007-011-015-073-095-103-123-141-143-155-175-177-195-201-203-
092240-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BOONE BUREAU CARROLL
HENRY KNOX LEE
MARSHALL OGLE PEORIA
PUTNAM STARK STEPHENSON
WHITESIDE WINNEBAGO WOODFORD
$$
WIC021-025-027-039-045-047-049-055-059-065-077-079-089-101-105-
111-117-127-131-133-092240-
WI
. WISCONSIN COUNTIES INCLUDED ARE
COLUMBIA DANE DODGE
FOND DU LAC GREEN GREEN LAKE
IOWA JEFFERSON KENOSHA
LAFAYETTE MARQUETTE MILWAUKEE
OZAUKEE RACINE ROCK
SAUK SHEBOYGAN WALWORTH
WASHINGTON WAUKESHA
$$
LMZ643-644-645-646-092240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
SHEBOYGAN TO PORT WASHINGTON WI
PORT WASHINGTON TO NORTH POINT LIGHT WI
NORTH POINT LIGHT TO WIND POINT WI
WIND POINT WI TO WINTHROP 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 (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (40%)
|
Probability of 1 or more wind events > 65 knots
|
Low (10%)
|
Hail
Probability of 10 or more severe hail events
|
Low (20%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (<5%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (60%)
|
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.