Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 359
NWS Storm Prediction Center Norman OK
400 PM CDT Sat Jul 11 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Iowa
Northern Illinois
Far Northeast Missouri
* Effective this Saturday afternoon from 400 PM until Midnight
CDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
A tornado or two possible
SUMMARY...Strong to severe thunderstorms may persist/redevelop along
a northwest/southeast-oriented boundary across the region, while
other storms are expected to further organize across east-central
Iowa and move southeastward into the region. Large hail is possible
but there will be an increasing concern for damaging winds across
the region by evening. A tornado cannot be ruled out, particularly
along the aforementioned boundary.
The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 25 miles west southwest
of Cedar Rapids IA to 15 miles north northeast of Danville IL. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU9).
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 356...WW 357...WW 358...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
32030.
...Guyer
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 359
NWS Storm Prediction Center Norman OK
400 PM CDT Sat Jul 11 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Iowa
Northern Illinois
Far Northeast Missouri
* Effective this Saturday afternoon from 400 PM until Midnight
CDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
A tornado or two possible
SUMMARY...Strong to severe thunderstorms may persist/redevelop along
a northwest/southeast-oriented boundary across the region, while
other storms are expected to further organize across east-central
Iowa and move southeastward into the region. Large hail is possible
but there will be an increasing concern for damaging winds across
the region by evening. A tornado cannot be ruled out, particularly
along the aforementioned boundary.
The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 25 miles west southwest
of Cedar Rapids IA to 15 miles north northeast of Danville IL. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU9).
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 356...WW 357...WW 358...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
32030.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW9
WW 359 SEVERE TSTM IA IL MO 112100Z - 120500Z
AXIS..65 STATUTE MILES NORTH AND SOUTH OF LINE..
25WSW CID/CEDAR RAPIDS IA/ - 15NNE DNV/DANVILLE IL/
..AVIATION COORDS.. 55NM N/S /28WNW IOW - 21WSW BVT/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 32030.
LAT...LON 42689217 41348749 39468749 40809217
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 359 Status Report Messages:
STATUS REPORT #4 ON WW 359
VALID 120145Z - 120240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 SW PIA TO
35 SE MLI TO 35 E DBQ.
..LYONS..07/12/20
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 359
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC007-011-019-037-039-053-063-089-093-099-103-105-107-113-123-
125-141-143-147-155-175-179-183-195-201-203-120240-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BOONE BUREAU CHAMPAIGN
DE KALB DE WITT FORD
GRUNDY KANE KENDALL
LA SALLE LEE LIVINGSTON
LOGAN MCLEAN MARSHALL
MASON OGLE PEORIA
PIATT PUTNAM STARK
TAZEWELL VERMILION WHITESIDE
WINNEBAGO 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 359
VALID 120045Z - 120140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 N OTM TO
20 SE CID TO 30 SSW DBQ TO 25 NNW DBQ.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1193
..LYONS..07/12/20
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 359
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-015-019-039-053-057-067-071-073-095-099-103-105-107-109-
113-123-125-131-143-147-155-161-175-179-183-187-195-203-
120140-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU CARROLL CHAMPAIGN
DE WITT FORD FULTON
HANCOCK HENDERSON HENRY
KNOX LA SALLE LEE
LIVINGSTON LOGAN MCDONOUGH
MCLEAN MARSHALL MASON
MERCER PEORIA PIATT
PUTNAM ROCK ISLAND STARK
TAZEWELL VERMILION WARREN
WHITESIDE WOODFORD
$$
IAC031-045-057-061-087-097-101-103-107-111-115-139-163-177-183-
120140-
IA
. IOWA COUNTIES INCLUDED ARE
CEDAR CLINTON DES MOINES
DUBUQUE HENRY JACKSON
JEFFERSON JOHNSON KEOKUK
LEE LOUISA MUSCATINE
SCOTT VAN BUREN WASHINGTON
$$
MOC045-120140-
MO
. MISSOURI COUNTIES INCLUDED ARE
CLARK
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 359
VALID 112240Z - 112340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..LYONS..07/11/20
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 359
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-015-019-039-053-057-067-071-073-095-099-103-105-107-109-
113-123-125-131-143-147-155-161-175-179-183-187-195-203-
112340-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU CARROLL CHAMPAIGN
DE WITT FORD FULTON
HANCOCK HENDERSON HENRY
KNOX LA SALLE LEE
LIVINGSTON LOGAN MCDONOUGH
MCLEAN MARSHALL MASON
MERCER PEORIA PIATT
PUTNAM ROCK ISLAND STARK
TAZEWELL VERMILION WARREN
WHITESIDE WOODFORD
$$
IAC011-019-031-045-055-057-061-087-095-097-101-103-105-107-111-
113-115-139-163-177-183-112340-
IA
. IOWA COUNTIES INCLUDED ARE
BENTON BUCHANAN CEDAR
CLINTON DELAWARE DES MOINES
DUBUQUE HENRY IOWA
JACKSON JEFFERSON JOHNSON
JONES KEOKUK LEE
LINN LOUISA MUSCATINE
SCOTT VAN BUREN WASHINGTON
$$
MOC045-112340-
MO
. MISSOURI COUNTIES INCLUDED ARE
CLARK
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 359
VALID 112140Z - 112240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..LYONS..07/11/20
ATTN...WFO...DVN...ILX...LOT...
&&
STATUS REPORT FOR WS 359
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC011-015-019-039-053-057-067-071-073-095-099-103-105-107-109-
113-123-125-131-143-147-155-161-175-179-183-187-195-203-
112240-
IL
. ILLINOIS COUNTIES INCLUDED ARE
BUREAU CARROLL CHAMPAIGN
DE WITT FORD FULTON
HANCOCK HENDERSON HENRY
KNOX LA SALLE LEE
LIVINGSTON LOGAN MCDONOUGH
MCLEAN MARSHALL MASON
MERCER PEORIA PIATT
PUTNAM ROCK ISLAND STARK
TAZEWELL VERMILION WARREN
WHITESIDE WOODFORD
$$
IAC011-019-031-045-055-057-061-087-095-097-101-103-105-107-111-
113-115-139-163-177-183-112240-
IA
. IOWA COUNTIES INCLUDED ARE
BENTON BUCHANAN CEDAR
CLINTON DELAWARE DES MOINES
DUBUQUE HENRY IOWA
JACKSON JEFFERSON JOHNSON
JONES KEOKUK LEE
LINN LOUISA MUSCATINE
SCOTT VAN BUREN WASHINGTON
$$
MOC045-112240-
MO
. MISSOURI COUNTIES INCLUDED ARE
CLARK
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (>95%)
|
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.