Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL3
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 713
NWS STORM PREDICTION CENTER NORMAN OK
1250 PM CDT WED AUG 19 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
EXTREME SOUTHEAST IOWA
WEST CENTRAL AND NORTHWEST ILLINOIS
EXTREME NORTHEAST MISSOURI
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL
700 PM CDT.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST SOUTHWEST OF
BURLINGTON IOWA TO 30 MILES NORTHEAST OF BLOOMINGTON ILLINOIS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU3).
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.
DISCUSSION...THUNDERSTORMS HAVE BEEN GRADUALLY INTENSIFYING EARLY
THIS AFTERNOON WITH AN MCV THAT IS MOVING NEWD FROM NE MO TOWARD SE
IA/WRN IL. A BELT OF ENHANCED LOW-MID LEVEL SHEAR IMMEDIATELY E-NE
OF THE MCV...ALONG WITH BOUNDARY LAYER DEWPOINTS IN THE LOW 70S
ALONG THE NWD MOVING WARM FRONT...WILL SUPPORT A THREAT FOR EMBEDDED
SUPERCELLS WITH A FEW TORNADOES THIS AFTERNOON.
AVIATION...TORNADOES AND 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 500.
MEAN STORM MOTION VECTOR 23030.
...THOMPSON
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW3
WW 713 TORNADO IA IL MO 191750Z - 200000Z
AXIS..75 STATUTE MILES NORTH AND SOUTH OF LINE..
35WSW BRL/BURLINGTON IA/ - 30NE BMI/BLOOMINGTON IL/
..AVIATION COORDS.. 65NM N/S /47NE IRK - 47S JOT/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 23030.
LAT...LON 41669175 41868851 39688851 39509175
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU3.
Watch 713 Status Report Messages:
STATUS REPORT #3 ON WW 713
VALID 192230Z - 192340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SE SPI TO
30 S MMO TO 20 W MMO TO 40 NE MLI.
..BROYLES..08/19/09
ATTN...WFO...DVN...LSX...ILX...LOT...
&&
STATUS REPORT FOR WT 713
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC019-029-031-037-039-041-043-045-053-063-075-089-091-093-099-
103-105-115-139-141-147-173-183-197-192340-
IL
. ILLINOIS COUNTIES INCLUDED ARE
CHAMPAIGN COLES COOK
DEKALB DE WITT DOUGLAS
DUPAGE EDGAR FORD
GRUNDY IROQUOIS KANE
KANKAKEE KENDALL LA SALLE
LEE LIVINGSTON MACON
MOULTRIE OGLE PIATT
SHELBY VERMILION WILL
$$
INC007-073-089-111-127-192340-
IN
. INDIANA COUNTIES INCLUDED ARE
BENTON JASPER LAKE
NEWTON PORTER
$$
LMZ740-741-742-192340-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
LMZ740
LMZ741
LMZ742
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 713
VALID 192050Z - 192140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 SE UIN TO
40 NE UIN TO 35 NW BRL AND 15 SSW SPI TO 25 NNE SPI TO 10 SW PIA
TO 35 SSE MLI TO 40 ENE OTM.
..GOSS..08/19/09
ATTN...WFO...DVN...LSX...ILX...LOT...
&&
STATUS REPORT FOR WT 713
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-019-021-029-037-039-041-045-053-063-073-075-089-091-093-
095-099-103-105-107-113-115-117-123-131-135-139-141-143-147-155-
161-167-173-175-179-183-195-203-192140-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU CHAMPAIGN CHRISTIAN
COLES DEKALB DE WITT
DOUGLAS EDGAR FORD
GRUNDY HENRY IROQUOIS
KANE KANKAKEE KENDALL
KNOX LA SALLE LEE
LIVINGSTON LOGAN MCLEAN
MACON MACOUPIN MARSHALL
MERCER MONTGOMERY MOULTRIE
OGLE PEORIA PIATT
PUTNAM ROCK ISLAND SANGAMON
SHELBY STARK TAZEWELL
VERMILION WHITESIDE WOODFORD
$$
IAC031-045-139-163-192140-
IA
. IOWA COUNTIES INCLUDED ARE
CEDAR CLINTON MUSCATINE
SCOTT
$$
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.
$$
STATUS REPORT #1 ON WW 713
VALID 191925Z - 192040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 SE UIN TO
40 NE UIN TO 35 NW BRL.
..GOSS..08/19/09
ATTN...WFO...DVN...LSX...ILX...LOT...
&&
STATUS REPORT FOR WT 713
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-017-037-039-057-063-071-073-089-093-095-099-103-105-107-
109-113-115-123-125-129-131-137-141-143-147-155-161-167-171-175-
179-187-195-203-192040-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU CASS DEKALB
DE WITT FULTON GRUNDY
HENDERSON HENRY KANE
KENDALL KNOX LA SALLE
LEE LIVINGSTON LOGAN
MCDONOUGH MCLEAN MACON
MARSHALL MASON MENARD
MERCER MORGAN OGLE
PEORIA PIATT PUTNAM
ROCK ISLAND SANGAMON SCOTT
STARK TAZEWELL WARREN
WHITESIDE WOODFORD
$$
IAC031-045-057-115-139-163-192040-
IA
. IOWA COUNTIES INCLUDED ARE
CEDAR CLINTON DES MOINES
LOUISA MUSCATINE SCOTT
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (50%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
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 (10%)
|
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% (F2-F5 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 
