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 462
NWS STORM PREDICTION CENTER NORMAN OK
1010 AM CDT THU JUN 18 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
PARTS OF EASTERN IOWA
PARTS OF NORTHERN AND CENTRAL ILLINOIS
EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 1010 AM UNTIL
400 PM CDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF
CEDAR RAPIDS IOWA TO 30 MILES NORTHEAST OF BLOOMINGTON ILLINOIS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).
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 459...WW 460...WW 461...
DISCUSSION...FORWARD PROPAGATING THUNDERSTORM COMPLEX/BOW ECHO ERN
IA EXPECTED TO DEVELOP SEWD ALONG AND ON COOL SIDE OF BOUNDARY
EXTENDING ACROSS CENTRAL IL. WIND DAMAGE WILL BE PRIMARY THREAT AND
WITH INCREASING DAY TIME INSTABILITY COULD BECOME MORE WIDESPREAD AS
COMPLEX TOWARD CENTRAL IL.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29030.
...HALES
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW2
WW 462 SEVERE TSTM IA IL 181510Z - 182100Z
AXIS..70 STATUTE MILES NORTH AND SOUTH OF LINE..
25W CID/CEDAR RAPIDS IA/ - 30NE BMI/BLOOMINGTON IL/
..AVIATION COORDS.. 60NM N/S /34NW IOW - 47S JOT/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 29030.
LAT...LON 42889220 41798851 39758851 40869220
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU2.
Watch 462 Status Report Messages:
STATUS REPORT #5 ON WW 462
VALID 181945Z - 182040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 SE BRL TO
40 S MLI TO 25 SE MLI TO 35 E MLI TO 35 WNW MMO TO 30 SSW MMO TO
20 NNE BMI TO 25 ESE BMI.
..MEAD..06/18/09
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 462
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-039-057-073-095-107-113-123-125-143-155-175-179-203-
182040-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU DE WITT FULTON
HENRY KNOX LOGAN
MCLEAN MARSHALL MASON
PEORIA PUTNAM STARK
TAZEWELL WOODFORD
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #4 ON WW 462
VALID 181845Z - 181940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 WSW PIA
TO 15 SSE MLI TO 30 E MLI TO 40 SW RFD TO 25 W RFD.
..MEAD..06/18/09
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 462
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-039-053-057-063-073-095-099-103-105-107-113-123-125-141-
143-155-175-179-203-181940-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU DE WITT FORD
FULTON GRUNDY HENRY
KNOX LA SALLE LEE
LIVINGSTON LOGAN MCLEAN
MARSHALL MASON OGLE
PEORIA PUTNAM STARK
TAZEWELL WOODFORD
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 462
VALID 181725Z - 181840Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MEAD..06/18/09
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 462
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-015-039-053-057-063-071-073-095-099-103-105-107-109-113-
123-125-131-141-143-155-161-175-179-187-195-203-181840-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU CARROLL DE WITT
FORD FULTON GRUNDY
HENDERSON HENRY KNOX
LA SALLE LEE LIVINGSTON
LOGAN MCDONOUGH MCLEAN
MARSHALL MASON MERCER
OGLE PEORIA PUTNAM
ROCK ISLAND STARK TAZEWELL
WARREN WHITESIDE WOODFORD
$$
IAC011-019-031-045-055-057-061-087-095-097-103-105-113-115-139-
163-183-181840-
IA
. IOWA COUNTIES INCLUDED ARE
BENTON BUCHANAN CEDAR
CLINTON DELAWARE DES MOINES
DUBUQUE HENRY IOWA
JACKSON JOHNSON JONES
LINN LOUISA MUSCATINE
SCOTT WASHINGTON
$$
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.
$$
STATUS REPORT #2 ON WW 462
VALID 181630Z - 181740Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MEAD..06/18/09
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 462
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-015-039-053-057-063-071-073-095-099-103-105-107-109-113-
123-125-131-141-143-155-161-175-179-187-195-203-181740-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU CARROLL DE WITT
FORD FULTON GRUNDY
HENDERSON HENRY KNOX
LA SALLE LEE LIVINGSTON
LOGAN MCDONOUGH MCLEAN
MARSHALL MASON MERCER
OGLE PEORIA PUTNAM
ROCK ISLAND STARK TAZEWELL
WARREN WHITESIDE WOODFORD
$$
IAC011-019-031-045-055-057-061-087-095-097-103-105-113-115-139-
163-183-181740-
IA
. IOWA COUNTIES INCLUDED ARE
BENTON BUCHANAN CEDAR
CLINTON DELAWARE DES MOINES
DUBUQUE HENRY IOWA
JACKSON JOHNSON JONES
LINN LOUISA MUSCATINE
SCOTT WASHINGTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 462
VALID 181550Z - 181640Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MEAD..06/18/09
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 462
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-015-039-053-057-063-071-073-095-099-103-105-107-109-113-
123-125-131-141-143-155-161-175-179-187-195-203-181640-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU CARROLL DE WITT
FORD FULTON GRUNDY
HENDERSON HENRY KNOX
LA SALLE LEE LIVINGSTON
LOGAN MCDONOUGH MCLEAN
MARSHALL MASON MERCER
OGLE PEORIA PUTNAM
ROCK ISLAND STARK TAZEWELL
WARREN WHITESIDE WOODFORD
$$
IAC011-019-031-045-055-057-061-087-095-097-103-105-113-115-139-
163-183-181640-
IA
. IOWA COUNTIES INCLUDED ARE
BENTON BUCHANAN CEDAR
CLINTON DELAWARE DES MOINES
DUBUQUE HENRY IOWA
JACKSON JOHNSON JONES
LINN LOUISA MUSCATINE
SCOTT WASHINGTON
$$
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 (F2-F5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (50%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (20%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (70%)
|
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.