Tornado Warning 77, NWS Quad Cities, IA

568 
WWUS53 KDVN 100204
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
904 PM CDT Sun Aug 9 2026

ILC011-073-100245-
/O.CON.KDVN.TO.W.0077.000000T0000Z-260810T0245Z/
Henry IL-Bureau IL-
904 PM CDT Sun Aug 9 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR EAST
CENTRAL HENRY AND WEST CENTRAL BUREAU COUNTIES...

At 903 PM CDT, a confirmed large and extremely dangerous tornado was
located over Johnson-Sauk Trail State Park, or 8 miles north of
Kewanee, moving northeast at 25 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado.

SOURCE...Weather spotters confirmed tornado.

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible.

The tornado will be near...
  Sheffield, Buda, and Mineral around 910 PM CDT.

This also includes Hennepin Canal State Trail, Johnson-Sauk Trail
State Recreation Area, and Mautino State Fish & Wildlife Area.
 
This includes Interstate 80 in Illinois between mile markers 35 and
47.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is on the ground. To protect your life, TAKE COVER NOW! Move
to a basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4132 8994 4136 8995 4139 8996 4144 8965
      4129 8960
TIME...MOT...LOC 0203Z 247DEG 23KT 4136 8988 

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
MAX HAIL SIZE...1.25 IN

$$

Ervin

666 
WWUS53 KDVN 100206
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
906 PM CDT Sun Aug 9 2026

ILC011-073-100245-
/O.CON.KDVN.TO.W.0077.000000T0000Z-260810T0245Z/
Henry IL-Bureau IL-
906 PM CDT Sun Aug 9 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR EAST
CENTRAL HENRY AND WEST CENTRAL BUREAU COUNTIES...

At 906 PM CDT, a confirmed tornado was located over Mineral, or 9
miles north of Kewanee, moving northeast at 25 mph.

HAZARD...Damaging tornado and half dollar size hail.

SOURCE...Weather spotters confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Sheffield, Buda, and Mineral around 910 PM CDT.

This also includes Hennepin Canal State Trail, Johnson-Sauk Trail
State Recreation Area, and Mautino State Fish & Wildlife Area.
 
This includes Interstate 80 in Illinois between mile markers 35 and
47.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4132 8994 4136 8995 4139 8996 4144 8965
      4129 8960
TIME...MOT...LOC 0206Z 247DEG 23KT 4137 8986 

TORNADO...OBSERVED
MAX HAIL SIZE...1.25 IN

$$

Ervin

582 
WWUS53 KDVN 100213
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
913 PM CDT Sun Aug 9 2026

ILC011-073-100245-
/O.CON.KDVN.TO.W.0077.000000T0000Z-260810T0245Z/
Henry IL-Bureau IL-
913 PM CDT Sun Aug 9 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR EAST
CENTRAL HENRY AND WEST CENTRAL BUREAU COUNTIES...

At 912 PM CDT, a confirmed tornado was located over Mineral, or 9
miles northeast of Kewanee, moving east at 20 mph.

HAZARD...Damaging tornado and quarter size hail.

SOURCE...Weather spotters confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Sheffield and Buda around 920 PM CDT.

This also includes Hennepin Canal State Trail and Mautino State Fish
& Wildlife Area.
 
This includes Interstate 80 in Illinois between mile markers 35 and
46.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4133 8986 4135 8991 4140 8990 4144 8965
      4132 8964
TIME...MOT...LOC 0212Z 253DEG 19KT 4136 8983 

TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN

$$

Ervin

213 
WWUS53 KDVN 100219
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
919 PM CDT Sun Aug 9 2026

ILC073-100229-
/O.CAN.KDVN.TO.W.0077.000000T0000Z-260810T0245Z/
Henry IL-
919 PM CDT Sun Aug 9 2026

...THE TORNADO WARNING FOR EAST CENTRAL HENRY COUNTY IS CANCELLED...

The tornadic thunderstorm which prompted the warning has weakened. 
moved out of the warned area.  Therefore, the warning has been 
cancelled.

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
north central Illinois.

&&

LAT...LON 4133 8983 4136 8984 4141 8984 4144 8965
      4132 8964
TIME...MOT...LOC 0219Z 253DEG 19KT 4137 8979 

$$

ILC011-100245-
/O.CON.KDVN.TO.W.0077.000000T0000Z-260810T0245Z/
Bureau IL-
919 PM CDT Sun Aug 9 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR WEST
CENTRAL BUREAU COUNTY...

At 919 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Mineral, or 11 miles northeast of Kewanee, moving
east at 20 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Sheffield and Buda around 925 PM CDT.

This also includes Hennepin Canal State Trail and Mautino State Fish
& Wildlife Area.
 
This includes Interstate 80 in Illinois between mile markers 37 and
46.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4133 8983 4136 8984 4141 8984 4144 8965
      4132 8964
TIME...MOT...LOC 0219Z 253DEG 19KT 4137 8979 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

Ervin

310 
WWUS53 KDVN 100225
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
925 PM CDT Sun Aug 9 2026

ILC011-100245-
/O.CON.KDVN.TO.W.0077.000000T0000Z-260810T0245Z/
Bureau IL-
925 PM CDT Sun Aug 9 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR WEST
CENTRAL BUREAU COUNTY...

At 925 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Sheffield, or 13 miles northeast of Kewanee, moving
east at 20 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
west central Bureau County.

This also includes Hennepin Canal State Trail.
 
This includes Interstate 80 in Illinois between mile markers 39 and
46.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This storm has a history of producing tornadoes.  Seek shelter now!

&&

LAT...LON 4136 8978 4135 8981 4142 8980 4144 8965
      4139 8965
TIME...MOT...LOC 0225Z 253DEG 16KT 4139 8976 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Ervin

489 
WWUS53 KDVN 100229
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
929 PM CDT Sun Aug 9 2026

ILC011-100239-
/O.CAN.KDVN.TO.W.0077.000000T0000Z-260810T0245Z/
Bureau IL-
929 PM CDT Sun Aug 9 2026

...THE TORNADO WARNING FOR WEST CENTRAL BUREAU COUNTY IS CANCELLED...

The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
north central Illinois.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
the Quad Cities.

&&

LAT...LON 4136 8978 4135 8981 4142 8980 4144 8965
      4139 8965
TIME...MOT...LOC 0228Z 269DEG 16KT 4139 8973 

$$

Ervin

Area Forecast Discussion
National Weather Service Quad Cities IA IL
620 PM CDT Sun Aug 9 2026

.KEY MESSAGES...

- Chances for storms this evening for portions of the area, as
  the battle between heat and convection continues (and will
  continue through at least mid week). Daily severe storm risks
  also continue with high instability possibly through at least
  Tuesday.

- A Heat Advisory is in effect today for the southern half of
  the area with heat indices near 100 or higher. Depending on
  clouds and storms, Monday may be just as hot.

- Cooler temperatures may occur later in the week and into next
  weekend if the warm dome of air can get shunted off to the
  southwest.

&&

.SHORT TERM /THROUGH MONDAY NIGHT/...
Issued at 244 PM CDT Sun Aug 9 2026

Following showers and isolated storms this morning, skies have
mostly cleared, as seen on visible satellite imagery. This, combined
with strong WAA into the region, has helped us to quickly become hot
and humid this afternoon. As of early this afternoon, a warm front
is draped along the Interstate 80 and Interstate 88 corridors, with
gusty winds south of the boundary allowing for some relief amidst
forecast heat indices in the low 90s to near 100 degrees. A Heat
Advisory is in effect until 8 PM this evening for areas along and
south of Interstate 80.

The notable forecast challenge this evening is the potential for
thunderstorms. Overall, the chances for thunderstorms has decreased
due to a cap that extends from 850-700 mb. Still, a low chance (20-
40%) of thunderstorms is possible from 7 to 11 PM this evening,
primarily east of the Mississippi River and along and south of
Interstate 80. If storms are able to develop, there is sufficient
shear and instability to support supercells capable of all severe
hazards.

Heat and humidity will continue on Monday as the warm front remains
draped across the area. While the NBM maintains a 40-80%
probability of exceeding heat indices of 100 degrees south of
Interstate 80, there is some uncertainty due to the potential
for showers and storms as another disturbance passes through the
flow. As such, any heat headline decisions have been left to
the midnight shift.

With the passage of another vort max on Monday, chances for storms
appear most likely in the afternoon and evening. However, capping
may once again limit any storms in our CWA, leading to development
just to our east in northeast Illinois. If storms are able to
develop, a similar setup to today would be in place, leading to
storms capable of all severe hazards.

&&

.LONG TERM /TUESDAY THROUGH SUNDAY/...
Issued at 300 AM CDT Sun Aug 9 2026

Tuesday through Saturday...With the flattening ridge transition, the
local area may be under the battle zone of the LLVL thermal gradient
and upper level short wave propagation path for almost daily chance
of showers and storms for much of the week and even into the
weekend. This deep summer-like MCS-track for much of the week from
the central plains over to the southern GRT LKS and OH RVR Valley
may add up to quite a bit of rainfall by Friday. At least temps look
cooler by late week and into the weekend as well, with a day or two
possibly held down in the 70s with cloud cover and east winds.

&&

.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 616 PM CDT Sun Aug 9 2026

A warm front is lifting northward through the area as of the
start of the period this evening. Thus far, the atmosphere
remains capped off from seeing storms developing along this
front, while farther east and north, near Lake Michigan, storms
are ongoing, and will be into the night, we appear more likely
to remain dry in eastern Iowa and far western Illinois. Some
MVFR cigs are scattered around the area, and may become more
numerous overnight, mainly in northeast Iowa, including DBQ and
CID. Tomorrow, a hot and humid day is expected, with light east
to south winds, and mainly VFR conditions after 15Z. A low
chance for thunderstorm redevelopment is possible in the
afternoon and evening Monday, but coverage is very uncertain,
below 30% in these outer periods, and we will leave it out of
TAFs at this issuance.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...Heat Advisory until 8 PM CDT this evening for IAZ063>065-067-
     068-076>078-087>089-098-099.
IL...Heat Advisory until 8 PM CDT this evening for ILZ015-016-
     024>026-034-035.
MO...Heat Advisory until 8 PM CDT this evening for MOZ009-010.

&&

SHORT TERM...Ellingworth
LONG TERM...12
AVIATION...Ervin

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
458 AM CDT Sun Aug 9 2026

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-101100-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
458 AM CDT Sun Aug 9 2026

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...TODAY AND TONIGHT

Several rounds of thunderstorms are possible today and into this
evening. There is a chance for severe storms especially from late
morning into the afternoon. Damaging winds will be the primary
threat, but large hail and a few tornadoes are also possible. The
Storm Prediction Center has placed much of the OutLook Area in a
Slight(Level 2 of 5) Risk for severe weather today. Locally heavy
rainfall and flash flooding will also be possible in areas with
repeated storm activity.

Dangerous heat and humidity will develop along and south of the
Interstate 80 corridor by this afternoon with heat indices
surpassing the 100 degree mark. A Heat Advisory has been issued
for these areas for this afternoon and evening. Thunderstorms and
clouds may temporarily interrupt the heat at times today.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Rounds of strong to severe storms will again be possible Monday
and Tuesday as the area continues to lay under an active storm
track. Marginal and Slight Risks for severe weather are in effect
for the Outlook Area for both days.

Depending on cloud cover and areas of rain, dangerous heat may
occur again on Monday and Tuesday with heat index readings
approaching or exceeding 100 degrees. Areas most likely for this
heat will be along and south of the Interstate 80 corridor.

.SPOTTER INFORMATION STATEMENT...

There is a good chance that spotter activation will be needed
today.

12

Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
528 PM CDT Sun Aug 9 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0756 PM     Tstm Wnd Dmg     Rubio                   41.22N 91.94W
08/07/2026                   Washington         IA   Emergency Mngr

            Delayed Report. Several trees blown down,
            many tree branches damaged in Rubio. A car
            port was flipped over. Shingles damaged at
            same residence. Damaged occurred coincident
            with heavy rain and hail. Time estimated
            from radar data.

&&

AE