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SPC Tornado/Severe Thunderstorm Watches



Storm Prediction Center



Published: Sun, 23 Jul 2017 10:45:01 +0000

Last Build Date: Sun, 23 Jul 2017 10:45:01 +0000

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SPC Severe Thunderstorm Watch 435

Sun, 23 Jul 2017 10:33:03 +0000

WW 435 SEVERE TSTM IL 230830Z - 231300Z
(image)

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 435
NWS Storm Prediction Center Norman OK
330 AM CDT Sun Jul 23 2017

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Central and southern Illinois

* Effective this Sunday morning from 330 AM until 800 AM CDT.

* Primary threats include...
  Scattered damaging winds and isolated significant gusts to 75
    mph possible

SUMMARY...Thunderstorms with a history of severe gusts -- including
measured 62-kt gust at SET (St. Charles MO) at 802Z -- will continue
to offer a threat for damaging wind across the new watch area.  The
complex should weaken over southeastern IL/southwestern Indiana as
it moves deeper into outflow air from earlier storms.  WFO LSX has
extended watch 434 eastward into more of IL and this new watch wraps
around that extension.

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 50 miles northwest of
Salem IL to 45 miles southeast of Mattoon IL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU5).

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 434...

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 27035.


...Edwards

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SPC Severe Thunderstorm Watch 435 Status Reports

Sun, 23 Jul 2017 10:33:03 +0000

WW 0435 Status Updates
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STATUS REPORT ON WW 435

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SE MVN TO
25 E SLO TO 30 WSW MTO TO 20 W HUF.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1406.

..PETERS..07/23/17

ATTN...WFO...ILX...PAH...


STATUS REPORT FOR WS 435 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ILC023-025-033-035-047-049-065-079-101-159-173-185-191-193-
231140-

IL 
.    ILLINOIS COUNTIES INCLUDED ARE

CLARK                CLAY                CRAWFORD            
CUMBERLAND           EDWARDS             EFFINGHAM           
HAMILTON             JASPER              LAWRENCE            
RICHLAND             SHELBY              WABASH              
WAYNE                WHITE               


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.

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SPC Severe Thunderstorm Watch 434 Status Reports

Sun, 23 Jul 2017 08:40:04 +0000

WW 0434 Status Updates
(image)

STATUS REPORT ON WW 434

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ENE VIH
TO 15 N STL TO 35 SE UIN TO 35 ESE UIN TO 20 W SPI.

..PETERS..07/23/17

ATTN...WFO...LSX...ILX...


STATUS REPORT FOR WS 434 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ILC005-027-051-061-083-117-119-121-133-135-137-163-171-189-
230940-

IL 
.    ILLINOIS COUNTIES INCLUDED ARE

BOND                 CLINTON             FAYETTE             
GREENE               JERSEY              MACOUPIN            
MADISON              MARION              MONROE              
MONTGOMERY           MORGAN              ST. CLAIR           
SCOTT                WASHINGTON          


MOC071-099-189-510-230940-

MO 
.    MISSOURI COUNTIES INCLUDED ARE

FRANKLIN             JEFFERSON           ST. LOUIS           




MISSOURI INDEPENDENT CITIES INCLUDED ARE

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