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 500
NWS Storm Prediction Center Norman OK
730 PM CDT Tue Jul 2 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northern into Central Illinois
* Effective this Tuesday evening from 730 PM until 1100 PM CDT.
* Primary threats include...
Scattered damaging wind gusts to 65 mph possible
Isolated large hail events to 1 inch in diameter possible
SUMMARY...A squall line will continue east into the Watch area this
evening. The more intense portions of the line may yield a risk for
50-65 mph gusts and potential wind damage. The severe risk will
likely lessen with eastward extent as the thunderstorm band
encounters weaker instability farther east in Illinois.
The severe thunderstorm watch area is approximately along and 25
statute miles east and west of a line from 25 miles northwest of
Rockford IL to 50 miles southwest of Peoria IL. 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 497...WW 498...WW 499...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 55 knots. A few
cumulonimbi with maximum tops to 450. Mean storm motion vector
27035.
...Smith
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 500 SEVERE TSTM IL 030030Z - 030400Z
AXIS..25 STATUTE MILES EAST AND WEST OF LINE..
25NW RFD/ROCKFORD IL/ - 50SW PIA/PEORIA IL/
..AVIATION COORDS.. 20NM E/W /56E DBQ - 47ENE UIN/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..55 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 27035.
LAT...LON 42458896 40168988 40169082 42458994
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 500 Status Report Messages:
STATUS REPORT #1 ON WW 500
VALID 030215Z - 030340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 S MLI TO
35 NE PIA.
..SQUITIERI..07/03/24
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 500
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC057-095-143-169-030340-
IL
. ILLINOIS COUNTIES INCLUDED ARE
FULTON KNOX PEORIA
SCHUYLER
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (10%)
|
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 (20%)
|
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.
weather.gov 
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