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Special Weather Statement

Special Weather Statement
National Weather Service Quad Cities IA IL
144 AM CDT Sat Jul 22 2017

IAZ040-052-064-065-067-068-ILZ015>018-220945-
Buchanan-Linn-Johnson-Cedar-Muscatine-Scott-Rock Island-Henry IL-
Bureau-Putnam-
Including the cities of Independence, Cedar Rapids, Iowa City,
Tipton, Muscatine, Davenport, Bettendorf, Moline, Rock Island,
Geneseo, Princeton, and Hennepin
144 AM CDT Sat Jul 22 2017

...Strong gusty winds possible through 4:30 AM...

A large area of thunderstorms moving southeast at 35 MPH will produce
gusty winds of 30 to over 50 MPH with possibly small hail up to the
size of dimes. Motorists with high profile vehicles should take be
prepared from the impact of gusty winds while driving. Secure any loose
items outside.

Torrential heavy rainfall rates of up to 2 inches an hour will result
in significant ponding in favored low lying locations with a risk of
localized flash flooding.

$$

Nichols



Excessive Heat Warning

URGENT - WEATHER MESSAGE
National Weather Service Quad Cities IA IL
845 PM CDT Fri Jul 21 2017

...Extended Period of Dangerous Heat and Humidity Continues...

.A hot and humid air mass will remain over much of the area
through Saturday. The heat combined with the humidity will
continue to push peak heat index values over 100 degrees. At
night, heat indices will remain at or above 75 providing little
relief. The cumulative effects of several consecutive days with
heat indices over 100 will increase the risk for heat related
illnesses for those spending time outside or without access to
air conditioning. There will be interrupted periods to the
excessive heat by thunderstorms, associated rain-cooled outflow,
and clouds.

IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034-
035-MOZ009-010-220945-
/O.CON.KDVN.EH.W.0001.000000T0000Z-170723T0100Z/
Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa-
Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL-
Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark-
Including the cities of Marengo, Iowa City, Tipton, Muscatine,
Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield,
Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline,
Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb,
Memphis, and Kahoka
845 PM CDT Fri Jul 21 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* Heat Index Values...up to 110 due to temperatures in the low
  to mid 90s...and dewpoints in the mid to upper 70s.

* Timing...through Saturday evening.

* Impacts...Increased risk for heat exhaustion or heat stroke
  for people spending time outside or living without air
  conditioning. Children and the elderly are most susceptible.
  Also, parked vehicles will become dangerously hot within
  minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

An Excessive Heat Warning means that a prolonged period of
dangerously hot temperatures and high humidity will occur.  This
combination will lead to a dangerous situation in which heat
illnesses are likely.  Drink plenty of fluids, stay in an air-
conditioned room, stay out of the sun, and check on relatives and
neighbors, especially the elderly.

Take extra precautions if you work or spend time outside.  When
possible, reschedule strenuous activities to early morning or
evening.  Know the signs and symptoms of heat exhaustion and heat
stroke.  Wear light weight and loose fitting clothing when
possible and drink plenty of water.

To reduce risk during outdoor work the occupational safety and
health administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments.  Anyone overcome by
heat should be moved to a cool and shaded location.  Heat stroke
is an emergency, call 9 1 1.

&&

$$



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
458 PM CDT Fri Jul 21 2017

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-221000-
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 PM CDT Fri Jul 21 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...LATE THIS AFTERNOON AND TONIGHT

Thunderstorms will continue to develop and move across portions of
the Outlook Area this afternoon and evening. The environment is
conducive for severe weather with damaging winds, tornadoes, flash
flooding and large hail as the main threats. A few supercell
thunderstorms are possible this afternoon and evening, before one
or more bow echoes develop and move across the area later this
evening. Some of these storms could be fast moving. Later tonight,
storms are expected to be slower moving, and possibly move across
the same areas. This may produce localized flash flooding. A Flash
Flood Watch is in effect tonight for areas generally along and
north of the Interstate 80 corridor.

The Rock and Pecatonica rivers are experiencing, or will
experience moderate to major flooding. Please see the latest
River Flood Statements and Flood Warnings for details.

Hot and humid weather will continue into this evening, with
heat indices up to 110 degrees south of Highway 30. Excessive
heat warnings and heat advisories remain in effect for most of
the outlook area through Saturday.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

Additional rounds of thunderstorms are possible Saturday,
especially along and south of the Highway 34 corridor. Then
isolated thunderstorms are possible on Sunday afternoon. Severe
weather is possible for both these periods, but confidence on
timing and favored locations remains low. If severe storms do
occur Saturday, the main threats would be damaging winds and
flash flooding. Large hail may be more of a threat on Sunday
afternoon.

Hot and muggy conditions will continue Saturday, with afternoon
heat indices up to 110 degrees south of Highway 30.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely this afternoon through the early
morning hours.

$$

12



Flash Flood Watch

Flood Watch
National Weather Service Quad Cities IA IL
310 PM CDT Fri Jul 21 2017

...Heavy rainfall and flash flooding possible from late this
afternoon through Saturday Morning...

.Additional rounds of heavy rain will affect portions of eastern
Iowa into northwestern Illinois from late this afternoon through
Saturday morning. After heavy rain producing thunderstorms impact
the area late this afternoon and evening, additional late night
storms may develop and move along the same areas. These swaths of
heavy rain, coupled with the already saturated ground, could
result in flash flooding across portions of the watch area.

IAZ040>042-051>054-063>068-ILZ009-015>018-220415-
/O.EXA.KDVN.FF.A.0004.170721T2100Z-170722T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Whiteside-Rock Island-Henry IL-
Bureau-Putnam-
Including the cities of Independence, Manchester, Dubuque,
Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City,
Tipton, Clinton, Muscatine, Davenport, Bettendorf, Sterling,
Moline, Rock Island, Geneseo, Princeton, and Hennepin
310 PM CDT Fri Jul 21 2017

...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY MORNING...

The National Weather Service in Quad Cities has expanded the

* Flash Flood Watch to include portions of Illinois and Iowa,
  including the following areas, in Illinois, Bureau, Henry IL,
  Putnam, Rock Island, and Whiteside. In Iowa, Benton, Buchanan,
  Cedar, Clinton, Delaware, Dubuque, Iowa, Jackson, Johnson,
  Jones, Linn, Muscatine, and Scott.

* Through Saturday morning

* Heavy rainfall of 1 to 3 inches with locally higher amounts
  possible.

* Impacts could include flooded roads and intersections, river
  flooding, and possible rock and mud slides in hilly terrain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that flash flooding is possible.
Monitor forecasts and take action if flash flood warnings are
issued or flash flooding develops.

&&

$$



U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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