Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 577
NWS Storm Prediction Center Norman OK
345 AM CDT Wed Jul 31 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southeast Iowa
Western and Northwest Illinois
Northeast Missouri
* Effective this Wednesday morning from 345 AM until 900 AM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph likely
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...A cluster of storms will likely persist and potentially
further intensify across southern Iowa into northeast Missouri and
west/northwest Illinois this morning, with damaging winds and some
hail possible.
The severe thunderstorm watch area is approximately along and 55
statute miles north and south of a line from 65 miles west northwest
of Burlington IA to 25 miles east southeast of Burlington IA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU7).
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 576...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
30035.
...Guyer
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 577
NWS Storm Prediction Center Norman OK
345 AM CDT Wed Jul 31 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southeast Iowa
Western and Northwest Illinois
Northeast Missouri
* Effective this Wednesday morning from 345 AM until 900 AM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph likely
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...A cluster of storms will likely persist and potentially
further intensify across southern Iowa into northeast Missouri and
west/northwest Illinois this morning, with damaging winds and some
hail possible.
The severe thunderstorm watch area is approximately along and 55
statute miles north and south of a line from 65 miles west northwest
of Burlington IA to 25 miles east southeast of Burlington IA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU7).
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 576...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
30035.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW7
WW 577 SEVERE TSTM IA IL MO 310845Z - 311400Z
AXIS..55 STATUTE MILES NORTH AND SOUTH OF LINE..
65WNW BRL/BURLINGTON IA/ - 25ESE BRL/BURLINGTON IA/
..AVIATION COORDS.. 50NM N/S /38SW IOW - 55NNE UIN/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 30035.
LAT...LON 41939228 41449069 39849069 40349228
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.
Watch 577 Status Report Messages:
STATUS REPORT #4 ON WW 577
VALID 311345Z - 311440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 NNE IRK
TO 35 ENE UIN.
..LEITMAN..07/31/24
ATTN...WFO...DVN...LSX...
&&
STATUS REPORT FOR WS 577
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC001-311440-
IL
. ILLINOIS COUNTIES INCLUDED ARE
ADAMS
$$
MOC103-111-311440-
MO
. MISSOURI COUNTIES INCLUDED ARE
KNOX LEWIS
$$
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.
$$
STATUS REPORT #3 ON WW 577
VALID 311240Z - 311340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 SE OTM TO
10 SW BRL TO 25 E BRL.
..GRAMS..07/31/24
ATTN...WFO...DVN...LSX...
&&
STATUS REPORT FOR WS 577
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC001-067-109-311340-
IL
. ILLINOIS COUNTIES INCLUDED ARE
ADAMS HANCOCK MCDONOUGH
$$
IAC111-177-311340-
IA
. IOWA COUNTIES INCLUDED ARE
LEE VAN BUREN
$$
MOC045-103-111-199-311340-
MO
. MISSOURI COUNTIES INCLUDED ARE
CLARK KNOX LEWIS
SCOTLAND
$$
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.
$$
STATUS REPORT #2 ON WW 577
VALID 311135Z - 311240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 NE OTM TO
BRL TO 20 SSW MLI.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1762.
..GRAMS..07/31/24
ATTN...WFO...DVN...LSX...
&&
STATUS REPORT FOR WS 577
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC001-067-071-109-131-187-311240-
IL
. ILLINOIS COUNTIES INCLUDED ARE
ADAMS HANCOCK HENDERSON
MCDONOUGH MERCER WARREN
$$
IAC101-111-177-311240-
IA
. IOWA COUNTIES INCLUDED ARE
JEFFERSON LEE VAN BUREN
$$
MOC045-103-111-199-311240-
MO
. MISSOURI COUNTIES INCLUDED ARE
CLARK KNOX LEWIS
SCOTLAND
$$
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.
$$
STATUS REPORT #1 ON WW 577
VALID 311035Z - 311140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1762.
..GRAMS..07/31/24
ATTN...WFO...DVN...LSX...
&&
STATUS REPORT FOR WS 577
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC001-067-071-109-131-187-311140-
IL
. ILLINOIS COUNTIES INCLUDED ARE
ADAMS HANCOCK HENDERSON
MCDONOUGH MERCER WARREN
$$
IAC057-087-095-101-103-107-111-115-139-177-183-311140-
IA
. IOWA COUNTIES INCLUDED ARE
DES MOINES HENRY IOWA
JEFFERSON JOHNSON KEOKUK
LEE LOUISA MUSCATINE
VAN BUREN WASHINGTON
$$
MOC045-103-111-199-311140-
MO
. MISSOURI COUNTIES INCLUDED ARE
CLARK KNOX LEWIS
SCOTLAND
$$
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 (EF2-EF5) tornadoes
|
Low (10%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
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 (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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