Alert archive / Iowa / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 176, NWS Des Moines, IA

June 16, 2017Kossuth County, Winnebago County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 16, 2017, 4:19 PM CDT for Kossuth County, Winnebago County, Iowa. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 16, 2017, 4:19 PM CDT (21:19 UTC)
Expired: Jun 16, 2017, 5:00 PM CDT
In force: 41 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Kossuth County, IA, Winnebago County, IA

The radar

The Minneapolis radar (KMPX), 166 km from the middle of the area, began a volume at 21:22 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 16, 4:36 PM CDT	HAIL 0.88	Thompson, IA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 16, 3:53 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.3 hours before the alert went out and 166 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 10 J/kg
Mixed-layer CIN: -161 J/kg
Mixed-layer LCL: 2409 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

815 
WUUS53 KDMX 162119
SVRDMX
IAC109-189-162200-
/O.NEW.KDMX.SV.W.0176.170616T2119Z-170616T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
419 PM CDT FRI JUN 16 2017

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  East central Kossuth County in north central Iowa...
  Winnebago County in north central Iowa...

* Until 500 PM CDT.

* At 419 PM CDT, a severe thunderstorm was located 10 miles northeast
  of Union Slogh, or 17 miles west of Forest City, moving east at 30
  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...
  Buffalo Center, Thompson and Leland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and 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 4332 9350 4326 9384 4326 9399 4336 9407
      4350 9380 4350 9370
TIME...MOT...LOC 2119Z 249DEG 25KT 4333 9397 

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

Beerends

3 follow-up statements

922 
WWUS53 KDMX 162128
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
428 PM CDT FRI JUN 16 2017

IAC109-162138-
/O.CAN.KDMX.SV.W.0176.000000T0000Z-170616T2200Z/
Kossuth IA-
428 PM CDT FRI JUN 16 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL KOSSUTH 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
north central Iowa.

LAT...LON 4332 9350 4326 9384 4328 9392 4338 9397
      4350 9380 4350 9370
TIME...MOT...LOC 2128Z 249DEG 27KT 4336 9387 

$$

IAC189-162200-
/O.CON.KDMX.SV.W.0176.000000T0000Z-170616T2200Z/
Winnebago IA-
428 PM CDT FRI JUN 16 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR WINNEBAGO COUNTY...

At 428 PM CDT, a severe thunderstorm was located 13 miles northwest
of Forest City, moving east at 30 mph.

HAZARD...Golf 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...
Buffalo Center, Thompson and Leland. 

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 4332 9350 4326 9384 4328 9392 4338 9397
      4350 9380 4350 9370
TIME...MOT...LOC 2128Z 249DEG 27KT 4336 9387 

HAIL...1.75IN
WIND...60MPH
 
$$

Beerends

699 
WWUS53 KDMX 162139
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
439 PM CDT FRI JUN 16 2017

IAC189-162200-
/O.CON.KDMX.SV.W.0176.000000T0000Z-170616T2200Z/
Winnebago IA-
439 PM CDT FRI JUN 16 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR CENTRAL WINNEBAGO COUNTY...

At 439 PM CDT, a severe thunderstorm was located 8 miles northwest of
Forest City, moving east at 35 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...
Thompson and Leland. 

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 4328 9375 4338 9381 4350 9370 4332 9350
TIME...MOT...LOC 2139Z 259DEG 33KT 4337 9373 

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

Cogil

752 
WWUS53 KDMX 162156
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
456 PM CDT FRI JUN 16 2017

IAC189-162206-
/O.EXP.KDMX.SV.W.0176.000000T0000Z-170616T2200Z/
Winnebago IA-
456 PM CDT FRI JUN 16 2017

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WINNEBAGO COUNTY WILL
EXPIRE AT 500 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A severe thunderstorm watch remains in effect until 1000 PM CDT for
north central Iowa.

LAT...LON 4328 9375 4338 9381 4350 9370 4332 9350
TIME...MOT...LOC 2156Z 249DEG 25KT 4341 9360 

$$

Cogil

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 16, 2:53 PM CDT, 1 hour 26 minutes earlier.

Area forecast discussion, Jun 16, 2:53 PM CDT, 1 hour 26 minutes before

Area Forecast Discussion
National Weather Service Des Moines IA
253 PM CDT Fri Jun 16 2017

.SHORT TERM.../Tonight through Saturday/
Issued at 251 PM CDT Fri Jun 16 2017

Main concern is severe weather potential and its timing both this
evening/tonight and Saturday afternoon.

Have nudged timing of thunderstorm activity slightly later, to
more of a 00Z or after time period. Surface warm front has pushed
northward and as of early this afternoon extended ESE from
northwest into east central and southeast IA. A weak low existed
across northeast NE with a trof/dryline extending southwestward
from it. MUCAPE values of 3000 J/kg or more existed in the warm
sector. SPC has maintained Enhanced Risk of severe weather across
much of the southwestern CWA. Main threats will be large hail
initially, then evolving into a wind threat.

The storms are likely to continue through the late evening and
early morning hours Saturday across the southeastern CWA,
eventually exiting the area by around 2 to 4 am across the
southeastern CWA. Lows will fall into the 60s once again with the
low/front pushed into southern Iowa.

On Saturday, more severe weather is possible but uncertainties
regarding the location of the frontal boundary remain. Present
thinking is that the best severe weather potential will be
confined to the southern CWA. SPC has an Enhanced Risk of severe
weather there, with the best timing beginning in the mid to late
afternoon hours.

.LONG TERM.../Saturday night through Friday/
Issued at 251 PM CDT Fri Jun 16 2017

The long term period will be characterized by unsettled weather
with opportunities for precipitation early in the period, then by
mid week and again later in the week. Temperatures will begin the
period with near to below normal temperatures, followed by a warm-
up by mid week.

The period will begin with walking the showers and thunderstorms
out on Saturday night. Sunday looks to be much cooler than the
temperatures we have experienced over the past several days. High
temperatures will be in the 70s. By mid-week the upper level
pattern will flatten, returning southerly surface flow and
temperatures well into the 80s. Additionally, a few shortwaves
will move through to end the week, however timing them and
resulting storms is difficult at this time.

&&

.AVIATION.../For the 18Z TAFS through 18Z Saturday afternoon/
Issued at 1113 AM CDT Fri Jun 16 2017

Main concern this period will be severe convection. Storms
expected to fire 20-22z northwest/north then develop south
southeast with time. Best dynamics/bulk shear/instability will
favor greatest threat from KFOD south southeast to KDSM from 22z
through 04z with possibly less intense storms near KMCW/KALO and
KOTM. Early in event large hail main threat then damaging wind aft
00-01z. Airport operations managers at KFOD/KDSM most likely to
see impactful storms and have hit these sites harder with
wind/+TSRA. Elsewhere less confident on higher end severe. Hires
models suggest 23-08z most impactful timeframe. Storms may
accelerate southeast with time to 40- 45kt aft 01Z. MVFR cigs
introduced at some TAF sites for Saturday morning.

&&

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

&&

SHORT TERM...Zogg
LONG TERM...Zogg
AVIATION...Zogg

Hazardous weather outlook, Jun 16, 4:06 AM CDT, 12 hours 13 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
406 AM CDT Fri Jun 16 2017

IAZ004>007-015>017-023>025-033>035-044-045-170915-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Sac-Calhoun-Webster-Crawford-Carroll-
406 AM CDT Fri Jun 16 2017

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Thunderstorms return this afternoon and tonight, there is an
enhanced risk for severe thunderstorms over much of the
outlook area. Large hail and damaging winds are the primary
threats. An isolated tornado or two may be possible as well.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

While thunderstorms will be possible Saturday, the primary severe
threat is expected to remain south of the area.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed at times between today and Saturday.

IAZ026>028-036>039-046>050-057>062-070>075-081>086-092>097-170915-
Franklin-Butler-Bremer-Hamilton-Hardin-Grundy-Black Hawk-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-
406 AM CDT Fri Jun 16 2017

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Thunderstorms return this afternoon and tonight, there is an
enhanced risk for severe thunderstorms over much of the
outlook area. Large hail and damaging winds are the primary
threats. An isolated tornado or two may be possible as well.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Additional severe thunderstorms are forecast Saturday afternoon
and evening. There is an enhanced risk for the area. Both severe
hail and damaging winds will be possible, though damaging winds
will be the primary threat.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed at times between today and Saturday
evening.

CURTIS

In the hours before

Local storm report, Jun 16, 10:39 AM CDT, 5 hours 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1039 AM CDT FRI JUN 16 2017

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

0615 PM     HAIL             5 NNW CLARKSVILLE       42.84N 92.71W
06/15/2017  E1.00 INCH       BUTLER             IA   TRAINED SPOTTER

            DELAYED REPORT.

&&

BF

Local storm report, Jun 16, 10:55 AM CDT, 5 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1055 AM CDT FRI JUN 16 2017

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

0645 PM     HAIL             5 SSE ALLISON           42.69N 92.77W
06/15/2017  E1.00 INCH       BUTLER             IA   TRAINED SPOTTER

            DELAYED REPORT. TIME ESTIMATED BASED ON
            SPOTTER REPORT AND RADAR.

&&

BF

Special weather statement, Jun 16, 3:30 PM CDT, 49 minutes before

Special Weather Statement
National Weather Service Des Moines IA
330 PM CDT FRI JUN 16 2017

IAZ004-162100-
Emmet IA-
330 PM CDT FRI JUN 16 2017

...Nickel Hail and Gusty Winds Possible Across Portions of Emmet
County...

At 329 PM CDT, Doppler radar was tracking a strong thunderstorm near
Superior, or near Estherville, moving east at 30 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Estherville, Swan Lake, Gruver, Fort Defiance State Park and
Estherville Municipal Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4350 9463 4333 9464 4339 9492 4350 9492
TIME...MOT...LOC 2029Z 269DEG 24KT 4349 9488

Beerends

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 15, 7:16 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Butler	40 min
Jun 15, 7:24 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass	21 min
Jun 15, 7:28 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	47 min
Jun 15, 7:52 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	38 min
Jun 15, 8:23 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Warren	37 min
Jun 15, 8:39 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	21 min
Jun 15, 8:43 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Warren	37 min
Jun 15, 8:55 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	50 min
Jun 15, 8:58 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Monroe	47 min
Jun 15, 9:17 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison	28 min
Jun 15, 9:19 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Monroe, Warren	27 min
Jun 15, 9:36 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Polk, Warren	39 min
Jun 15, 9:44 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion	46 min
Jun 15, 9:45 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass, Union	60 min
Jun 15, 10:38 PM CDT	Severe Thunderstorm Warning	DMX	Marion	25 min
Jun 15, 10:40 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	35 min
Jun 15, 10:50 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	25 min
Jun 15, 10:57 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	37 min
Jun 15, 11:07 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	23 min
Jun 15, 11:23 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	52 min
Jun 15, 11:54 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Poweshiek	36 min
Jun 16, 3:30 PM CDT	Special Weather Statement	DMX	Emmet	30 min
Jun 16, 3:39 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	21 min
Jun 16, 5:09 PM CDT	Special Weather Statement	DMX	Worth	51 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.