Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL2
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 542
NWS Storm Prediction Center Norman OK
1055 PM EDT Mon Jul 15 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
East central Illinois
West central into central Indiana
* Effective this Monday night and Tuesday morning from 1055 PM
until 500 AM EDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph likely
Isolated large hail events to 1 inch in diameter possible
A tornado or two possible
SUMMARY...A well-formed, bowing squall line with a history of
damaging winds will continue east-southeastward from Illinois into
Indiana through the early morning hours. Wind damage and severe
wind gusts of 60-75 mph will be the main threat, though isolated
large hail near 1 inch in diameter and a tornado or two with
embedded circulations will also be possible.
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 40 miles south
southwest of Decatur IL to 40 miles northeast of Indianapolis IN.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU2).
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 539...WW 541...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few
cumulonimbi with maximum tops to 550. Mean storm motion vector
30040.
...Thompson
SEL2
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 542
NWS Storm Prediction Center Norman OK
1055 PM EDT Mon Jul 15 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
East central Illinois
West central into central Indiana
* Effective this Monday night and Tuesday morning from 1055 PM
until 500 AM EDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph likely
Isolated large hail events to 1 inch in diameter possible
A tornado or two possible
SUMMARY...A well-formed, bowing squall line with a history of
damaging winds will continue east-southeastward from Illinois into
Indiana through the early morning hours. Wind damage and severe
wind gusts of 60-75 mph will be the main threat, though isolated
large hail near 1 inch in diameter and a tornado or two with
embedded circulations will also be possible.
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 40 miles south
southwest of Decatur IL to 40 miles northeast of Indianapolis IN.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU2).
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 539...WW 541...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few
cumulonimbi with maximum tops to 550. Mean storm motion vector
30040.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW2
WW 542 SEVERE TSTM IL IN 160255Z - 160900Z
AXIS..45 STATUTE MILES NORTH AND SOUTH OF LINE..
40SSW DEC/DECATUR IL/ - 40NE IND/INDIANAPOLIS IN/
..AVIATION COORDS.. 40NM N/S /30SSW AXC - 35NE IND/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..65 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 30040.
LAT...LON 39958916 40788574 39488574 38648916
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU2.
Watch 542 Status Report Messages:
STATUS REPORT #1 ON WW 542
VALID 160430Z - 160540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SSE SPI
TO 20 NNE MTO TO 15 WSW LAF TO 35 N LAF.
..MOORE..07/16/24
ATTN...WFO...ILX...IND...
&&
STATUS REPORT FOR WS 542
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC023-029-033-035-045-049-079-173-160540-
IL
. ILLINOIS COUNTIES INCLUDED ARE
CLARK COLES CRAWFORD
CUMBERLAND EDGAR EFFINGHAM
JASPER SHELBY
$$
INC011-015-021-023-045-057-059-063-067-081-095-097-107-109-119-
121-133-145-153-157-159-165-167-160540-
IN
. INDIANA COUNTIES INCLUDED ARE
BOONE CARROLL CLAY
CLINTON FOUNTAIN HAMILTON
HANCOCK HENDRICKS HOWARD
JOHNSON MADISON MARION
MONTGOMERY MORGAN OWEN
PARKE PUTNAM SHELBY
SULLIVAN TIPPECANOE TIPTON
VERMILLION VIGO
$$
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 (5%)
|
Wind
Probability of 10 or more severe wind events
|
High (70%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (60%)
|
Hail
Probability of 10 or more severe hail events
|
Low (20%)
|
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 (90%)
|
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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