Severe Thunderstorm Warning 80, NWS Quad Cities, IA

757 
WWUS53 KDVN 180118
SVSDVN

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

ILC073-131-161-195-IAC139-163-180215-
/O.CON.KDVN.SV.W.0080.000000T0000Z-170518T0215Z/
Rock Island IL-Mercer IL-Whiteside IL-Henry IL-Scott IA-Muscatine IA-
818 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR ROCK ISLAND...NORTHEASTERN MERCER...SOUTHERN WHITESIDE...NORTHERN
HENRY...SCOTT AND NORTHEASTERN MUSCATINE COUNTIES...

At 818 PM CDT, severe thunderstorms were located along a line
extending from near DeWitt to near Buffalo to near Illinois City to
near Eliza, moving east at 25 mph.

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

SOURCE...Trained weather spotters. 

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

Locations impacted include...
Davenport, Moline, Rock Island, Bettendorf, East Moline, Sterling,
Rock Falls, Morrison, Silvis, Geneseo, Eldridge, Milan, Colona, Le
Claire, Coal Valley, Prophetstown, Hampton, Orion, Port Byron and
Walcott.

This includes the following highways...
 Interstate 74 in Iowa between mile markers 1 and 5.
 Interstate 80 in Iowa between mile markers 283 and 306.
 Interstate 80 in Illinois between mile markers 1 and 22.
 Interstate 74 in Illinois between mile markers 1 and 22.
 Interstate 88 between mile markers 1 and 41.
 Interstate 280 between mile markers 1 and 18.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

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

LAT...LON 4150 8995 4140 9012 4126 9047 4122 9078
      4128 9093 4132 9098 4174 9075 4177 9053
      4176 9044 4173 9041 4173 9032 4181 9018
      4181 8963
TIME...MOT...LOC 0118Z 255DEG 23KT 4176 9053 4150 9068 4135 9084 4133
9092

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

ERVIN

264 
WWUS53 KDVN 180133
SVSDVN

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

ILC131-180143-
/O.CAN.KDVN.SV.W.0080.000000T0000Z-170518T0215Z/
Mercer IL-
833 PM CDT WED MAY 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MERCER COUNTY IS
CANCELLED...

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

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

LAT...LON 4150 8995 4140 9012 4127 9043 4133 9044
      4133 9057 4136 9062 4141 9083 4145 9087
      4174 9075 4174 9071 4175 9069 4177 9053
      4176 9046 4173 9041 4173 9032 4181 9018
      4181 8963
TIME...MOT...LOC 0133Z 243DEG 28KT 4174 9045 4161 9048 4149 9073 4144
9079

$$

ILC073-161-195-IAC139-163-180215-
/O.CON.KDVN.SV.W.0080.000000T0000Z-170518T0215Z/
Rock Island IL-Whiteside IL-Henry IL-Scott IA-Muscatine IA-
833 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR ROCK ISLAND...SOUTHERN WHITESIDE...NORTHERN HENRY...SCOTT AND
NORTHEASTERN MUSCATINE COUNTIES...

At 833 PM CDT, severe thunderstorms were located along a line
extending from McCausland to near Bettendorf to Buffalo to
Montpelier, moving northeast at 30 mph.

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

SOURCE...Trained weather spotters. 

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

Locations impacted include...
Davenport, Moline, Rock Island, Bettendorf, East Moline, Sterling,
Rock Falls, Morrison, Silvis, Geneseo, Eldridge, Colona, Milan, Le
Claire, Coal Valley, Prophetstown, Hampton, Orion, Port Byron and
Walcott.

This includes the following highways...
 Interstate 74 in Iowa between mile markers 1 and 5.
 Interstate 80 in Iowa between mile markers 284 and 306.
 Interstate 80 in Illinois between mile markers 1 and 22.
 Interstate 74 in Illinois between mile markers 1 and 22.
 Interstate 88 between mile markers 1 and 41.
 Interstate 280 between mile markers 1 and 18.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

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

LAT...LON 4150 8995 4140 9012 4127 9043 4133 9044
      4133 9057 4136 9062 4141 9083 4145 9087
      4174 9075 4174 9071 4175 9069 4177 9053
      4176 9046 4173 9041 4173 9032 4181 9018
      4181 8963
TIME...MOT...LOC 0133Z 243DEG 28KT 4174 9045 4161 9048 4149 9073 4144
9079

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

ERVIN

951 
WWUS53 KDVN 180150
SVSDVN

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

IAC139-180159-
/O.CAN.KDVN.SV.W.0080.000000T0000Z-170518T0215Z/
Muscatine IA-
850 PM CDT WED MAY 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MUSCATINE COUNTY
IS CANCELLED...

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

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

LAT...LON 4150 8995 4140 9012 4127 9043 4133 9044
      4138 9050 4143 9054 4148 9067 4154 9072
      4169 9062 4175 9057 4177 9053 4176 9046
      4173 9041 4173 9032 4181 9018 4181 8963
TIME...MOT...LOC 0149Z 251DEG 22KT 4172 9041 4161 9048 4158 9053 4152
9061

$$

ILC073-161-195-IAC163-180215-
/O.CON.KDVN.SV.W.0080.000000T0000Z-170518T0215Z/
Rock Island IL-Whiteside IL-Henry IL-Scott IA-
850 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR EASTERN ROCK ISLAND...SOUTHERN WHITESIDE...NORTHERN HENRY AND
EASTERN SCOTT COUNTIES...

At 849 PM CDT, severe thunderstorms were located along a line
extending from near McCausland to near Riverdale to near Bettendorf
to near Davenport, moving east at 25 mph.

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

SOURCE...Trained weather spotters. 

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

Locations impacted include...
Davenport, Moline, Rock Island, Bettendorf, East Moline, Sterling,
Rock Falls, Morrison, Silvis, Geneseo, Eldridge, Colona, Milan, Le
Claire, Coal Valley, Prophetstown, Hampton, Orion, Port Byron and
Erie.

This includes the following highways...
 Interstate 74 in Iowa between mile markers 1 and 5.
 Interstate 80 in Iowa between mile markers 290 and 306.
 Interstate 80 in Illinois between mile markers 1 and 22.
 Interstate 74 in Illinois between mile markers 1 and 22.
 Interstate 88 between mile markers 1 and 41.
 Interstate 280 between mile markers 1 and 18.

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 northwestern
Illinois...and east central Iowa.

LAT...LON 4150 8995 4140 9012 4127 9043 4133 9044
      4138 9050 4143 9054 4148 9067 4154 9072
      4169 9062 4175 9057 4177 9053 4176 9046
      4173 9041 4173 9032 4181 9018 4181 8963
TIME...MOT...LOC 0149Z 251DEG 22KT 4172 9041 4161 9048 4158 9053 4152
9061

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

ERVIN

104 
WWUS53 KDVN 180203
SVSDVN

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

IAC163-180213-
/O.CAN.KDVN.SV.W.0080.000000T0000Z-170518T0215Z/
Scott IA-
903 PM CDT WED MAY 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SCOTT COUNTY IS
CANCELLED...

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

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

LAT...LON 4150 8995 4140 9012 4127 9043 4133 9043
      4143 9054 4147 9042 4155 9041 4160 9030
      4164 9033 4173 9032 4181 9018 4181 8963
TIME...MOT...LOC 0203Z 256DEG 23KT 4174 9032 4163 9039 4160 9044 4154
9052

$$

ILC073-161-195-180215-
/O.CON.KDVN.SV.W.0080.000000T0000Z-170518T0215Z/
Rock Island IL-Whiteside IL-Henry IL-
903 PM CDT WED MAY 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR EASTERN ROCK ISLAND...SOUTHERN WHITESIDE AND NORTHERN HENRY
COUNTIES...

At 903 PM CDT, severe thunderstorms were located along a line
extending from near Cordova to near Le Claire to near Bettendorf to
near Riverdale, moving east at 25 mph.

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

SOURCE...Trained weather spotters. 

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

Locations impacted include...
Moline, East Moline, Sterling, Rock Falls, Morrison, Silvis, Geneseo,
Colona, Coal Valley, Prophetstown, Hampton, Orion, Port Byron, Erie,
Garden Plain, Rapids City, Albany, Cordova, Lyndon and Cleveland.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 1 and 22.
 Interstate 74 in Illinois between mile markers 7 and 22.
 Interstate 88 between mile markers 1 and 41.

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 northwestern
Illinois...and east central Iowa.

LAT...LON 4150 8995 4140 9012 4127 9043 4133 9043
      4143 9054 4147 9042 4155 9041 4160 9030
      4164 9033 4173 9032 4181 9018 4181 8963
TIME...MOT...LOC 0203Z 256DEG 23KT 4174 9032 4163 9039 4160 9044 4154
9052

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

ERVIN

599 
WWUS53 KDVN 180215
SVSDVN

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

ILC073-161-195-180224-
/O.EXP.KDVN.SV.W.0080.000000T0000Z-170518T0215Z/
Rock Island IL-Whiteside IL-Henry IL-
915 PM CDT WED MAY 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ROCK ISLAND...SOUTHERN
WHITESIDE AND NORTHERN HENRY COUNTIES WILL EXPIRE AT 915 PM CDT...

The storms which prompted the warning have moved out of
the warned area. Therefore, the warning will be allowed to expire.
However small hail and gusty winds are still possible with these
thunderstorms.

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

Remember, a Severe Thunderstorm Warning still remains in effect for
Whiteside County.

LAT...LON 4150 8995 4140 9012 4127 9043 4133 9043
      4143 9054 4147 9042 4155 9041 4160 9030
      4164 9033 4173 9032 4181 9018 4181 8963
TIME...MOT...LOC 0214Z 256DEG 23KT 4176 9024 4165 9031 4162 9036 4156
9044

$$

ERVIN

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
747 PM CDT WED MAY 17 2017

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

0740 PM     HAIL             SSE GRANDVIEW           41.28N 91.19W
05/17/2017  E1.75 INCH       LOUISA             IA   TRAINED SPOTTER

0734 PM     HEAVY RAIN       MARENGO                 41.80N 92.07W
05/17/2017  E1.10 INCH       IOWA               IA   TRAINED SPOTTER

            WATER STANDING IN THE STREETS

&&

TES

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

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

0750 PM     HAIL             1 N WALCOTT             41.61N 90.78W
05/17/2017  E0.50 INCH       SCOTT              IA   TRAINED SPOTTER

            PEA TO DIMES AT I-80 TRUCK STOP.

&&

GROSS

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

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

0754 PM     HAIL             1 N WALCOTT             41.61N 90.78W
05/17/2017  M1.00 INCH       SCOTT              IA   TRAINED SPOTTER

            AT I-80 TRUCK STOP.

&&

GROSS

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

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

0628 PM     TSTM WND GST     1 W RYAN                42.35N 91.50W
05/17/2017  M89 MPH          DELAWARE           IA   FIRE DEPT/RESCUE

&&

TES

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

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

0734 PM     HAIL             FRUITLAND               41.35N 91.13W
05/17/2017  M1.00 INCH       MUSCATINE          IA   PUBLIC

            PICTURE FROM TWITTER, TIME ESTIMATED.

&&

PETERS

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

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

0759 PM     TSTM WND GST     DONAHUE                 41.69N 90.68W
05/17/2017  M60 MPH          SCOTT              IA   TRAINED SPOTTER

            VERY HEAVY RAIN FALLING.

&&

GROSS