Severe Thunderstorm Warning 114, NWS Des Moines, IA

977 
WWUS53 KDMX 070157
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
857 PM CDT WED JUN 6 2018

IAC001-003-029-175-070245-
/O.CON.KDMX.SV.W.0114.000000T0000Z-180607T0245Z/
Cass IA-Union IA-Adams IA-Adair IA-
857 PM CDT WED JUN 6 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR SOUTHEASTERN CASS...WESTERN UNION...ADAMS AND SOUTHWESTERN ADAIR
COUNTIES...

At 857 PM CDT, a severe thunderstorm was located 11 miles southwest
of Greenfield, moving south at 35 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Creston, Corning, Lenox, Lake Icaria, Fontanelle, Massena, Prescott,
Bridgewater, Cromwell, Kent, Nodaway Park, Corning Municipal Airport
and Lake Icaria State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4130 9484 4135 9452 4090 9432 4090 9480
TIME...MOT...LOC 0157Z 347DEG 29KT 4124 9465 

HAIL...1.50IN
WIND...60MPH
 
$$

Beerends

545 
WWUS53 KDMX 070206
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
906 PM CDT WED JUN 6 2018

IAC001-003-029-175-070245-
/O.CON.KDMX.SV.W.0114.000000T0000Z-180607T0245Z/
Cass IA-Union IA-Adams IA-Adair IA-
906 PM CDT WED JUN 6 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR SOUTHEASTERN CASS...WESTERN UNION...ADAMS AND SOUTHWESTERN ADAIR
COUNTIES...

At 906 PM CDT, a severe thunderstorm was located 10 miles northeast
of Lake Icaria, or 11 miles southwest of Greenfield, moving south 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...
Creston, Corning, Lenox, Lake Icaria, Fontanelle, Massena, Prescott,
Bridgewater, Cromwell, Kent, Nodaway Park, Corning Municipal Airport
and Lake Icaria State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4131 9477 4135 9452 4090 9432 4090 9480
TIME...MOT...LOC 0206Z 348DEG 22KT 4119 9463 

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

Beerends

472 
WWUS53 KDMX 070219
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
919 PM CDT WED JUN 6 2018

IAC029-070229-
/O.CAN.KDMX.SV.W.0114.000000T0000Z-180607T0245Z/
Cass IA-
919 PM CDT WED JUN 6 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CASS COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central and southwestern Iowa.

LAT...LON 4132 9469 4135 9452 4090 9442 4090 9480
      4109 9479 4116 9469
TIME...MOT...LOC 0219Z 340DEG 27KT 4109 9462 

$$

IAC001-003-175-070245-
/O.CON.KDMX.SV.W.0114.000000T0000Z-180607T0245Z/
Union IA-Adams IA-Adair IA-
919 PM CDT WED JUN 6 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR SOUTHWESTERN UNION...ADAMS AND SOUTHWESTERN ADAIR COUNTIES...

At 919 PM CDT, a severe thunderstorm was located near Lake Icaria, or
9 miles northeast of Corning, moving south 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...
Corning, Lenox, Lake Icaria, Fontanelle, Prescott, Bridgewater,
Cromwell, Kent, Lake Icaria State Park, Corning Municipal Airport and
Nodaway Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4132 9469 4135 9452 4090 9442 4090 9480
      4109 9479 4116 9469
TIME...MOT...LOC 0219Z 340DEG 27KT 4109 9462 

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

Beerends

Area Forecast Discussion
National Weather Service Des Moines IA
643 PM CDT Wed Jun 6 2018

.DISCUSSION.../Tonight through Wednesday/
Issued at 253 PM CDT Wed Jun 6 2018

Iowa is just downstream of the upper ridge axis across the Plains in
an area of good warm advection and moisture advection.  Strong
instability has developed into the western half of Iowa this
afternoon as temperatures and dewpoints have quickly risen. Surface
boundary is pushing into northern Iowa with a weak shortwave
crossing through South Dakota along with some associated forcing.
This setup is the main concern in the short term with the potential
for severe convection late this afternoon into tonight. Latest GOES-
16 visible imagery is showing agitated cumulus near Storm Lake
and cap is likely to break within an hour or two as the updrafts
continue to strengthen and the front approaches. Given the strong
instability, rapid development is expected once initiation occurs.
However, shear is modest at best with effective bulk shear around
25- 35kts across much of the area. Despite this lack of stronger
shear, the strong instability should be more than sufficient for
severe hail production. Downdraft CAPES are also robust with
values of 1200-1400 adding the wind threat component as well. Any
tornado potential is likely to be early in the event with initial
strong updrafts stretching out any available surface vorticity
near the boundary. As gusts fronts consolidate into the evening,
the system is likely to become a forward propagating line moving
southeast through central into southern Iowa during the evening
with hail and winds the main threat. Heavy rains will also occur
given PWATs approaching 1.5 inches although as the system become
more progressive, the overall threat for flash flooding is
expected to remain limited, although urban areas are always
concerning in high rate events.

This convective complex is expected to pass out of southern Iowa
this evening.  However, main low level flow will continue to be
focused just west of the forecast area in Nebraska as southeast
South Dakota overnight with convection continuing in those
locations.  Upper flow will likely carry some of this convection
into western areas overnight with additional rainfall and some
limited severe threat persisting through sunrise.

Another round of convection is expected from later Thursday
afternoon into Friday morning as a shortwave passes through the
Plains and toward the state.  There remains the potential for severe
weather during this time along with heavy rain although detail
remain somewhat sketchy as the convection tonight into early
Thursday will impact Thursday afternoons outcome.  The potential for
additional periods of convection persist into the weekend and
especially later Monday into Monday night as the main shortwave
passes through the state.  Temperatures will be at the mercy of
convection, although with no push of colder air until early next
week, readings will remain mostly above normal.

&&

.AVIATION.../For the 00Z TAFS through 00Z Thursday evening/
Issued at 642 PM CDT Wed Jun 6 2018

Thunderstorms will impact the KDSM and KOTM areas early in the
period. Primary threat is strong outflow winds through 03z.
Additional storms may occur on Thursday though confidence is low
enough at any location to keep out of the forecast at this time.
As storms end, the wind will generally become light then
gradually become east/southeast on Thu.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

DISCUSSION...Cogil
AVIATION...Donavon

Hazardous Weather Outlook
National Weather Service Des Moines IA
329 PM CDT Wed Jun 6 2018

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-072030-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
329 PM CDT Wed Jun 6 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

Scattered strong to severe thunderstorms are developing this
afternoon and will continue into tonight. The main threats will
be damaging thunderstorm wind gusts, large hail, and heavy rain.
An isolated tornado or two is also possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

An active weather pattern will continue into the weekend. A few
severe storms are possible on Thursday and Friday with the main
threat expected to be hail and winds. The heavy rain potential
also exists Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotters might be needed this afternoon into tonight and at times
Thursday into this weekend.

Ansorge

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
800 PM CDT WED JUN 6 2018

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

0754 PM     TSTM WND GST     6 S MENLO               41.44N 94.39W
06/06/2018  E60 MPH          ADAIR              IA   PUBLIC

&&

RD

Special Weather Statement
National Weather Service Des Moines IA
801 PM CDT WED JUN 6 2018

IAZ083-084-094>097-070145-
Appanoose IA-Clarke IA-Wayne IA-Lucas IA-Davis IA-Decatur IA-
801 PM CDT WED JUN 6 2018

...GUSTY WINDS TO 50 MPH POSSIBLE...

At 801 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles northeast of Lake Sundown to 6 miles
south of Osceola. Movement was south at 40 mph. Some of the
strongest winds are out ahead of the main precipitation area of the
storms.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Centerville, Leon, Corydon, Lake Sundown, Rathbun Lake, Seymour,
Moravia, Moulton, Allerton, Humeston, Mystic, Cincinnati, Van Wert,
Lineville, Garden Grove, Davis City, Decatur City, Exline, Weldon and
Promise City.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central and southeastern Iowa.

LAT...LON 4091 9382 4090 9262 4059 9263 4058 9387
TIME...MOT...LOC 0101Z 004DEG 35KT 4093 9265 4094 9380

Beerends

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
811 PM CDT WED JUN 6 2018

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

0640 PM     HAIL             1 S URBANDALE           41.62N 93.74W
06/06/2018  E0.88 INCH       POLK               IA   TRAINED SPOTTER

            DELAYED REPORT.

&&

Special Weather Statement
National Weather Service Des Moines IA
825 PM CDT WED JUN 6 2018

IAZ044-070200-
Crawford IA-
825 PM CDT WED JUN 6 2018

...NICKEL HAIL POSSIBLE...

At 824 PM CDT, Doppler radar was tracking a strong thunderstorm near
Danbury, or 15 miles southwest of Ida Grove, moving southeast at 25
mph. Nickel hail was reported in Danbury with this storm.

Nickel size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Schleswig, Charter Oak and Ricketts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
west central Iowa.

LAT...LON 4210 9567 4221 9567 4221 9539 4201 9549
      4210 9566
TIME...MOT...LOC 0124Z 308DEG 21KT 4217 9565

Beerends

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
830 PM CDT WED JUN 6 2018

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

0640 PM     TSTM WND DMG     3 N LYNNVILLE           41.62N 92.79W
06/06/2018                   JASPER             IA   PUBLIC

            2 LARGE TREES DOWN (3FT AND 2.5FT DIAMETER)
            VIA SOCIAL MEDIA.

&&

Special Weather Statement
National Weather Service Des Moines IA
840 PM CDT WED JUN 6 2018

IAZ070>072-081-082-092-093-070215-
Adams IA-Adair IA-Ringgold IA-Union IA-Madison IA-Taylor IA-Cass IA-
840 PM CDT WED JUN 6 2018

...GUSTY WINDS IN EXCESS OF 50 MPH...

At 839 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles east of Creston to 10 miles west of
Greenfield. Movement was south at 50 mph.

Half inch hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Creston, Greenfield, Mount Ayr, Corning, Lenox, Sun Valley Lake,
Green Valley Lake, Lake Icaria, Afton, Fontanelle, Orient,
Clearfield, Lorimor, Diagonal, Kellerton, Prescott, Tingley,
Bridgewater, Macksburg and Cromwell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central and southwestern Iowa.

LAT...LON 4085 9477 4139 9475 4115 9401 4061 9403
TIME...MOT...LOC 0139Z 001DEG 42KT 4112 9417 4127 9466

Beerends