Severe Thunderstorm Warning 82, NWS Quad Cities, IA

518 
WWUS53 KDVN 180244 RRA
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
944 PM CDT WED MAY 17 2017

ILC011-073-180330-
/O.CON.KDVN.SV.W.0082.000000T0000Z-170518T0330Z/
Henry IL-Bureau IL-
944 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHEASTERN HENRY AND BUREAU COUNTIES...

At 943 PM CDT, severe thunderstorms were located along a line
extending from near Annawan to near Sheffield to near Kewanee, moving
northeast at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Law enforcement reported a power line down in Kewanee at 
         941 pm. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Kewanee, Princeton, Hennepin, Spring Valley, Galva, DePue, Walnut,
Ladd, Wyanet, Sheffield, Annawan, Tiskilwa, La Moille, Buda, Bureau
Junction, Ohio, Cherry, Neponset, Malden and Manlius.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 34 and 70.
 Interstate 180 between mile markers 3 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
sturdy building.

&&

A tornado watch remains in effect until 1100 PM CDT for north central
and northwestern Illinois.

LAT...LON 4123 8944 4123 8947 4122 8947 4115 8958
      4115 8964 4123 8964 4123 8987 4115 8987
      4115 8997 4122 9020 4159 8959 4158 8917
      4140 8916
TIME...MOT...LOC 0243Z 230DEG 45KT 4139 8985 4132 8982 4124 8986 

HAIL...1.00IN
WIND...60MPH
 
$$

12

159 
WWUS53 KDVN 180255
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
955 PM CDT WED MAY 17 2017

ILC073-180304-
/O.CAN.KDVN.SV.W.0082.000000T0000Z-170518T0330Z/
Henry IL-
955 PM CDT WED MAY 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HENRY COUNTY IS
CANCELLED...

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

A tornado watch remains in effect until 1100 PM CDT for north central
and northwestern Illinois.

LAT...LON 4123 8943 4123 8947 4122 8947 4115 8958
      4115 8964 4123 8964 4123 8986 4143 8986
      4158 8960 4158 8917 4140 8916
TIME...MOT...LOC 0254Z 231DEG 47KT 4151 8968 4141 8965 4126 8969 

$$

ILC011-180330-
/O.CON.KDVN.SV.W.0082.000000T0000Z-170518T0330Z/
Bureau IL-
955 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR BUREAU COUNTY...

At 954 PM CDT, severe thunderstorms were located along a line
extending from near Walnut to near Wyanet to near Buda, moving
northeast at 55 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Princeton, Hennepin, Spring Valley, DePue, Walnut, Ladd, Wyanet,
Sheffield, Tiskilwa, La Moille, Buda, Bureau Junction, Ohio, Cherry,
Neponset, Malden, Manlius, Seatonville, Mineral and Milo.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 36 and 70.
 Interstate 180 between mile markers 3 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
sturdy building.

&&

A tornado watch remains in effect until 1100 PM CDT for north central
and northwestern Illinois.

LAT...LON 4123 8943 4123 8947 4122 8947 4115 8958
      4115 8964 4123 8964 4123 8986 4143 8986
      4158 8960 4158 8917 4140 8916
TIME...MOT...LOC 0254Z 231DEG 47KT 4151 8968 4141 8965 4126 8969 

HAIL...<.75IN
WIND...60MPH
 
$$

12

035 
WWUS53 KDVN 180307
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1007 PM CDT WED MAY 17 2017

ILC011-180330-
/O.CON.KDVN.SV.W.0082.000000T0000Z-170518T0330Z/
Bureau IL-
1007 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR BUREAU COUNTY...

At 1007 PM CDT, severe thunderstorms were located along a line
extending from 7 miles west of La Moille to near Princeton to
Bradford, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Princeton, Hennepin, Spring Valley, DePue, Walnut, Ladd, Wyanet,
Sheffield, Tiskilwa, La Moille, Buda, Bureau Junction, Ohio, Cherry,
Neponset, Malden, Manlius, Seatonville, Mineral and Milo.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 36 and 70.
 Interstate 180 between mile markers 3 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
sturdy building.

&&

A tornado watch remains in effect until 1100 PM CDT for north central
and northwestern Illinois.

LAT...LON 4123 8943 4123 8947 4122 8947 4115 8958
      4115 8964 4123 8964 4123 8986 4143 8986
      4158 8960 4158 8917 4140 8916
TIME...MOT...LOC 0307Z 276DEG 36KT 4157 8942 4138 8943 4118 8963 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

12

446 
WWUS53 KDVN 180308
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1008 PM CDT WED MAY 17 2017

ILC011-180330-
/O.CON.KDVN.SV.W.0082.000000T0000Z-170518T0330Z/
Bureau IL-
1008 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR BUREAU COUNTY...

At 1008 PM CDT, severe thunderstorms were located along a line
extending from 7 miles west of La Moille to near Princeton to
Bradford, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Princeton, Hennepin, Spring Valley, DePue, Walnut, Ladd, Wyanet,
Tiskilwa, La Moille, Buda, Bureau Junction, Ohio, Cherry, Malden,
Seatonville, Milo, Arlington, Dover, Hollowayville and Coal Hollow.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 47 and 70.
 Interstate 180 between mile markers 3 and 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
sturdy building.

&&

A tornado watch remains in effect until 1100 PM CDT for north central
Illinois.

LAT...LON 4123 8943 4123 8947 4122 8947 4115 8958
      4115 8964 4123 8964 4123 8981 4140 8965
      4158 8960 4158 8917 4140 8916
TIME...MOT...LOC 0308Z 276DEG 36KT 4157 8942 4138 8943 4118 8963 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

12

186 
WWUS53 KDVN 180331
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
1031 PM CDT WED MAY 17 2017

ILC011-180341-
/O.EXP.KDVN.SV.W.0082.000000T0000Z-170518T0330Z/
Bureau IL-
1031 PM CDT WED MAY 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR BUREAU COUNTY HAS EXPIRED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been allowed to expire.

A tornado watch remains in effect until 100 AM CDT for north central
Illinois.

LAT...LON 4123 8943 4123 8947 4122 8947 4115 8958
      4115 8964 4123 8964 4123 8981 4140 8965
      4158 8960 4158 8917 4140 8916
TIME...MOT...LOC 0331Z 240DEG 46KT 4170 8911 4151 8913 4131 8933 

$$

12

Area Forecast Discussion
National Weather Service Quad Cities IA IL
645 PM CDT Wed May 17 2017

.UPDATE...
Issued at 645 pm CDT Wed May 17 2017

A line of severe storms with confirmed wind gusts of 60 to 70
mph, heavy rainfall and hail is moving across eastern IA with
embedded supercells possibly producing tornadoes, mainly south of
I-80. Mesoanalysis indicates the tornado potential remains,
especially along the southern portions of the line, over the next
couple hours. A tornado watch remains in effect for most of the
CWA until 11 pm.

&&

.SYNOPSIS...
Issued at 221 PM CDT Wed May 17 2017

Abbreviated early issuance AFD to get ready for convective event.
Water vapor showing neg tilted upper wave on track acrs southeastern
Neb. After potentail convective severe event this afternoon and
evening, a reprieve with cooler conditions on Thu. Then the next
main upstream large cut-off upper low will roll out to the upper
Midwest for a wet end to the week and start to the weekend.
Generally cooler Sunday into earlier next week, with another wave
digging from the northwest for another precip event toward mid next
week.

&&

.SHORT TERM...(This Evening through Thursday)
ISSUED AT 221 PM CDT Wed May 17 2017

Will have to watch for isolated to sctrd elevated storms with
hail potential ahead of the "main show" for the rest of the
afternoon, but the main severe weather event currently gathering
steam/"bubbling" in sfc pressure falls max over the MO RVR
Valley. Strong wing of lift into current mesoanalysis-indicated
already strongly sheared environment in place acrs the local area,
supportive of enhanced severe weather risk acrs the area
especially along and west of the MS RVR. Most of latest run
HiRes/CAM's continue to suggest an arching wing or two of broken
line of supercells, mixed with a few strong convective clusters,
moving rapidly at 50-60 MPH in from the west- southwest mainly
after 21z, with prime impact window from 5 PM to 8 or 9 PM CDT
before the brunt of the activity blows eastward. Again speed of
storms to complicate matters and increase danger aspect. Current
CAPEs of 1000-1500 J/KG acrs the region may increase a bit more
through early evening, while brunt of Cap/EML starts to migrate
eastward. This should be adequate for such strong shear profiles
to work with for all modes of severe weather, with tornadoes and
large hail the prime threats. But lingering concern that limited
CAPE for such strong shear profiles, may actually limit a higher
end severe weather event such as if we had 3000+ CAPEs.

The tornado threat may be limited to the initial incoming line as
long as llvl winds have some type of southeasterly direction
component, but then switch to more hail and damaging winds, as llvl
ambient environmental winds go south-southwest making for a more
uniform vertical profile, but still very high in speed shear.

Some isolated to sctrd showers and storms may linger acrs the
northern half of the CWA after the main line exits off to the east-
northeast through midnight, but then mainly dry into Thu morning or
just some wrap-around showers in the far north as upper level
cyclone pivots acrs northern WI and induces wrap-around.

Thu...after wrap around showers decrease in the north, this day
mainly dry and cooler in between two upper cyclones, with varying
amounts of cloud cover. LLVL baroclinicity aligns and tightens along
and south of the DVN CWA into the evening, with northeast post-
frontal boundary layer winds keeping temps in the 60s to low 70s
acrs much of the area.    ..12..

.LONG TERM...(Thursday Night through next Wednesday)
ISSUED AT 221 PM CDT Wed May 17 2017

Active weather pattern to continue through the period with chances
of rain and thunderstorms through the beginning of the weekend and
then again midweek next week.  Previously discussed issues with
model inconsistency still remains with this package.  This, along
with the threat for severe weather today has led to heavy use of
blended guidance for the long term.  Overall agreement in the large
scale pattern through the period means that the mesoscale details
need to be worked out and thus lead to most of uncertainty
throughout the period.   Gibbs

&&

.AVIATION...(For the 00Z TAFS through 00Z Thursday Evening)
ISSUED AT 645 PM CDT Wed May 17 2017

A line of severe thunderstorms with wind gusts to 55 kts moving
across eastern Iowa will affect the terminals early this evening.
Outside of the thunderstorms, strong south winds from 25 to 35 kts
will shift to the southwest to west and diminish to less than 15
kts by midnight behind the associated passing front. Otherwise,
conditions will be mainly VFR with a period of low confidence MVFR
ceilings possible late tonight into early Thursday morning. Winds
will become west and then northwest during the day Thursday as
surface low pressure moves into the Great Lakes.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...NONE.
IL...NONE.
MO...NONE.
&&

SYNOPSIS...12
SHORT TERM...12
LONG TERM...Gibbs
AVIATION...Sheets

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
302 AM CDT Wed May 17 2017

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-180815-
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-
302 AM CDT Wed May 17 2017

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...TONIGHT

Scattered thunderstorms are expected this morning. The main
threats are lightning and hail to penny size.

More widespread thunderstorms are expected this afternoon and
evening. Fast-moving storms could produce damaging winds around 70
mph and tornadoes. A secondary threat is large hail.

A south wind will gust around 40 mph this afternoon. Drivers of
high profile vehicles should use caution.

Area rivers are experiencing flooding. Please see the
latest Flood Statements and Flood Warnings for details.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

There is a risk of thunderstorms late Thursday night through
Saturday evening. It is too early to determine the severe weather
risk.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is expected between 2 PM and 10 PM CDT today.

RP Kinney/08

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
849 PM CDT WED MAY 17 2017

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

0845 PM     FUNNEL CLOUD     4 WNW ATKINSON          41.44N 90.09W
05/17/2017                   HENRY              IL   PUBLIC

            UNCONFIRMED PUBLIC REPORT RELAYED TO LAW ENFORCEMENT.

&&

TES

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
851 PM CDT WED MAY 17 2017

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

0845 PM     TSTM WND GST     HOOPPOLE                41.52N 89.91W
05/17/2017  E40 MPH          HENRY              IL   TRAINED SPOTTER

            LOTS OF LIGHTNING

&&

TES

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
854 PM CDT WED MAY 17 2017

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

0850 PM     TSTM WND GST     SE CLINTON              41.84N 90.23W
05/17/2017  E60.00 MPH       CLINTON            IA   AMATEUR RADIO

            50 TO 60 MPH WIND.

0850 PM     HAIL             SE CLINTON              41.84N 90.23W
05/17/2017  E0.75 INCH       CLINTON            IA   AMATEUR RADIO

&&

GROSS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
925 PM CDT WED MAY 17 2017

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

0925 PM     TSTM WND GST     1 E FREEPORT            42.29N 89.62W
05/17/2017  M60 MPH          STEPHENSON         IL   TRAINED SPOTTER

&&

PETERS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
932 PM CDT WED MAY 17 2017

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

0932 PM     NON-TSTM WND GST MILLEDGEVILLE           41.96N 89.78W
05/17/2017  E70 MPH          CARROLL            IL   EMERGENCY MNGR

&&

PETERS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
935 PM CDT WED MAY 17 2017

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

0420 PM     TORNADO          1 ESE RICHLAND          41.18N 91.98W
05/17/2017                   KEOKUK             IA   FIRE DEPT/RESCUE

            TORNADO MOVED NORTHEAST INTO WASHINGTON COUNTY.

&&

BROOKS