Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 374
NWS Storm Prediction Center Norman OK
315 PM CDT Wed Jul 15 2020
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northeast Illinois
* Effective this Wednesday afternoon and evening from 315 PM
until 900 PM CDT.
* Primary threats include...
A couple tornadoes possible
Isolated damaging wind gusts to 70 mph possible
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY...Severe weather/tornado threat may develop northeastward
across parts of northeastern Illinois this afternoon, with all
severe hazards a possibility.
The tornado watch area is approximately along and 30 statute miles
north and south of a line from 25 miles west southwest of Marseilles
IL to 70 miles east southeast of Marseilles IL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU4).
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 373...
AVIATION...Tornadoes and 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 500. Mean
storm motion vector 24025.
...Guyer
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 374
NWS Storm Prediction Center Norman OK
315 PM CDT Wed Jul 15 2020
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northeast Illinois
* Effective this Wednesday afternoon and evening from 315 PM
until 900 PM CDT.
* Primary threats include...
A couple tornadoes possible
Isolated damaging wind gusts to 70 mph possible
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY...Severe weather/tornado threat may develop northeastward
across parts of northeastern Illinois this afternoon, with all
severe hazards a possibility.
The tornado watch area is approximately along and 30 statute miles
north and south of a line from 25 miles west southwest of Marseilles
IL to 70 miles east southeast of Marseilles IL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU4).
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 373...
AVIATION...Tornadoes and 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 500. Mean
storm motion vector 24025.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 374 TORNADO IL 152015Z - 160200Z
AXIS..30 STATUTE MILES NORTH AND SOUTH OF LINE..
25WSW MMO/MARSEILLES IL/ - 70ESE MMO/MARSEILLES IL/
..AVIATION COORDS.. 25NM N/S /21ENE BDF - 30NW BVT/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24025.
LAT...LON 41668912 41418744 40548744 40808912
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 374 Status Report Messages:
STATUS REPORT #2 ON WW 374
VALID 160025Z - 160140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SW MMO TO
20 SSW VPZ.
..LYONS..07/16/20
ATTN...WFO...LOT...
&&
STATUS REPORT FOR WT 374
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC053-075-091-105-160140-
IL
. ILLINOIS COUNTIES INCLUDED ARE
FORD IROQUOIS KANKAKEE
LIVINGSTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 374
VALID 152310Z - 160040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SW MMO TO
25 W VPZ.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1236
..LYONS..07/15/20
ATTN...WFO...LOT...
&&
STATUS REPORT FOR WT 374
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC053-075-091-105-160040-
IL
. ILLINOIS COUNTIES INCLUDED ARE
FORD IROQUOIS KANKAKEE
LIVINGSTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (30%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Low (20%)
|
Probability of 1 or more wind events > 65 knots
|
Low (<5%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
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 
@NWSSPC
