Alert archive / Iowa / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 174, NWS Des Moines, IA

June 28, 2018Lucas County, Marion County, Warren County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 28, 2018, 12:12 PM CDT for Lucas County, Marion County, Warren County, Iowa. It was in force for 48 min. 18 reports 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 28, 2018, 12:12 PM CDT (17:12 UTC)
Expired: Jun 28, 2018, 1:00 PM CDT
In force: 48 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 0.88 in
Wind: 70.0 mph

Counties Lucas County, IA, Marion County, IA, Warren County, IA

The radar

The Des Moines radar (KDMX), 41 km from the middle of the area, began a volume at 17:16 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 28, 12:14 PM CDT	TSTM WND DMG	1 W Indianola, IA	MULTIPLE TREE BRANCHES DOWN 3 INCHES OR GREATER NEAR WARREN COUNTY FAIRGROUND VIA SOCIAL MEDIA. TIME ESTIMATED VIA RADAR.
Jun 28, 12:14 PM CDT	TSTM WND DMG	2 Sse Bevington, IA	TRUCK OVERTURNED ON INTERSTATE 35 NEAR MILE MARKER 55.
Jun 28, 12:15 PM CDT	TSTM WND GST 68	Indianola, IA
Jun 28, 12:17 PM CDT	TSTM WND DMG	Indianola, IA	MULTIPLE TREE BRANCHES DOWN 3 INCHES AND GREATER ALONG HWY. 92 IN INDIANOLA VIA SOCIAL MEDIA PICTURES. TIME ESTIMATED BY RADAR.
Jun 28, 12:18 PM CDT	TSTM WND DMG	Martensdale, IA	SEVERAL REPORTS OF TREES DOWN BETWEEN MARTENSDALE AND INDIANOLA.
Jun 28, 12:21 PM CDT	NON-TSTM WND GST 70	Cumming, IA	LARGE TREES DOWN, AT LEAST 1 FOOT IN DIAMETER.
Jun 28, 12:22 PM CDT	TSTM WND DMG	Cumming, IA	TREE BRANCH SPLIT AT 43RD AND DAWSON IN CUMMING VIA SOCIAL MEDIA PICTURE. TIME ESTIMATED VIA RADAR.
Jun 28, 12:22 PM CDT	TSTM WND DMG	Indianola, IA	REPORTED AT BOSTON AVE INDIANOLA, IA VIA SOCIAL MEDIA. LARGE TREES DOWN, DAMAGE TO VEHICLES. KNOCKED POWER LINES DOWN. TIME ESTIMATED VIA RADAR.
Jun 28, 12:24 PM CDT	TSTM WND DMG	Cumming, IA	MULTIPLE 1 TO 2 INCH TREE BRANCHES DOWN IN CUMMING VIA SOCIAL MEDIA.
Jun 28, 12:24 PM CDT	TSTM WND GST 58	Indianola, IA
Jun 28, 12:25 PM CDT	TSTM WND DMG	Indianola, IA	LARGE TREE DOWN ON HOUSE.
Jun 28, 12:28 PM CDT	TSTM WND DMG	3 N Indianola, IA	GRAIN BINS KNOCKED OVER, WIDESPREAD TREE DAMAGE, INCLUDING TREES SNAPPED AT THE TRUNK.
Jun 28, 12:30 PM CDT	TSTM WND GST 88	1 Nnw Indianola, IA	MEASURED BY ANEMOMETER ON SIMPSON COLLEGE CAMPUS BEFORE POWER WAS LOST DURING SEVERE THUNDERSTORM.
Jun 28, 12:32 PM CDT	TSTM WND DMG	2 S Norwalk, IA	LARGE TREE FELL ON ROOF OF HOME VIA SOCIAL MEDIA PICTURE. TIME ESTIMATED BY RADAR.
Jun 28, 12:35 PM CDT	TSTM WND DMG	Norwalk, IA	MUTLIPLE 1-2 INCH BRANCHES ARE DOWN ALONG UNION STREET NEAR WARREN COUNTY BORDER. A FEW BRANCHES ARE 3 TO 4 INCHES IN DIAMETER.
Jun 28, 12:45 PM CDT	TSTM WND DMG	1 Sw Knoxville, IA	SEVERAL LARGE TREES DOWN IN KNOXVILLE.
Jun 28, 12:48 PM CDT	TSTM WND GST 85	Norwalk, IA	MANY BRANCHES OR TREES DOWN...3 INCHES OR MORE IN DIAMETER. 2.5 INCHES OF RAIN FELL IN ONE HALF HOUR. PEA SIZED HAIL. WIND GUSTS ESTIMATED AT 76 TO 85 MPH.
Jun 28, 12:59 PM CDT	TSTM WND DMG	Melcher-Dallas, IA	6 TO 12 INCH TREES DOWN. POWER LINES DOWN.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 17 storm reports to this severe thunderstorm warning; the first came 2 minutes after it went out.

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 28, 8:12 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 5.2 hours before the alert went out and 244 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: 3530 J/kg
Mixed-layer CIN: -227 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

As transmitted.

043 
WUUS53 KDMX 281712
SVRDMX
IAC117-125-181-281800-
/O.NEW.KDMX.SV.W.0174.180628T1712Z-180628T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Des Moines IA
1212 PM CDT THU JUN 28 2018

The National Weather Service in Des Moines  has issued a

* Severe Thunderstorm Warning for...
  Northern Lucas County in south central Iowa...
  Western Marion County in south central Iowa...
  Warren County in south central Iowa...

* Until 100 PM CDT.

* At 1212 PM CDT, a severe thunderstorm was located near Indianola,
  moving east at 60 mph.

  HAZARD...70 mph wind gusts and nickel size hail.

  SOURCE...Trained weather spotters. These storms have produced wind 
           damage in the warned counties.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Des Moines, West Des Moines, Indianola, Norwalk, Knoxville,
  Carlisle, Monroe, Pleasantville, Melcher-Dallas, Knoxville Raceway,
  Avenue Of The Saints Event Center, Lake Red Rock, Milo, Hartford,
  Martensdale, Lacona, Cumming, Williamson, St. Marys and Ackworth.

This includes Interstate 35 between mile markers 50 and 60, and
between mile markers 63 and 64.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is a DANGEROUS SITUATION. This storm is producing widespread 
wind damage across south central Iowa. SEEK SHELTER NOW inside a 
sturdy structure and stay away from windows!

&&

LAT...LON 4126 9379 4136 9379 4151 9376 4151 9341
      4149 9342 4150 9340 4149 9340 4150 9338
      4149 9336 4150 9335 4148 9335 4151 9333
      4151 9308 4095 9310
TIME...MOT...LOC 1712Z 286DEG 54KT 4129 9362 

HAIL...0.88IN
WIND...70MPH
 
$$

MF

1 follow-up statement

180 
WWUS53 KDMX 281728
SVSDMX

Severe Weather Statement
National Weather Service Des Moines IA
1228 PM CDT THU JUN 28 2018

IAC117-125-181-281800-
/O.CON.KDMX.SV.W.0174.000000T0000Z-180628T1800Z/
Lucas IA-Marion IA-Warren IA-
1228 PM CDT THU JUN 28 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR NORTHERN LUCAS...WESTERN MARION AND WARREN COUNTIES...

At 1227 PM CDT, severe thunderstorms were located along a line
extending from 6 miles southeast of Carlisle to 6 miles west of
Melcher-Dallas to 8 miles northwest of Chariton, moving east at 55
mph.

These are very dangerous storms.

HAZARD...80 mph wind gusts and nickel size hail.

SOURCE...Radar indicated. A measured gusts of 68 mph was reported in 
         Indianola at 1215pm.  Stronger winds are possible.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. 
         Extensive tree damage and power outages are likely.

Locations impacted include...
Des Moines, West Des Moines, Indianola, Norwalk, Knoxville, Carlisle,
Monroe, Pleasantville, Melcher-Dallas, Knoxville Raceway, Avenue Of
The Saints Event Center, Lake Red Rock, Milo, Hartford, Martensdale,
Lacona, Cumming, Williamson, St. Marys and Ackworth.

This includes Interstate 35 between mile markers 50 and 60, and
between mile markers 63 and 64.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across south central Iowa. SEEK SHELTER NOW inside a 
sturdy structure and stay away from windows.
 
&&

LAT...LON 4126 9379 4136 9379 4151 9376 4151 9341
      4149 9342 4150 9340 4149 9340 4150 9338
      4149 9336 4150 9335 4148 9335 4151 9333
      4151 9308 4095 9310
TIME...MOT...LOC 1727Z 287DEG 49KT 4144 9343 4120 9337 4109 9344 

HAIL...0.88IN
WIND...80MPH
 
$$

MF

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 28, 9:01 AM CDT, 3 hours 11 minutes earlier.

Area forecast discussion, Jun 28, 9:01 AM CDT, 3 hours 11 minutes before

Area Forecast Discussion
National Weather Service Des Moines IA
901 AM CDT Thu Jun 28 2018

.UPDATE...
Issued at 901 AM CDT Thu Jun 28 2018

Slightly elevated severe storm currently in eastern Nebraska
continues to move east around 40kts on northern edge of impressive
instability axis. Shear is sufficient to maintain some balance
with respect to the cold pool although OAX radar does show outflow
advancing southeast of the main updrafts which would limit severe
potential where that outflow outruns the main cores. However,
severe weather threat will continue near the intersection of the
outflow and line and have seen severe hail reports and strong wind
gusts. Concern also increases with daytime heating a weakening of
cap as insolation warms the low levels. May see some
reinvigorated updrafts at the boundary layer destabilizes with
large hail and damaging winds remaining likely. Current movement
would bring it to the Des Moines metro around 18Z or slightly
before.

This will likely affect temperatures as well with rainfall/clouds
limiting heating across portions of current heat advisory areas
although no plans to alter any headlines at this point.

UPDATE Issued at 535 AM CDT Thu Jun 28 2018

Did introduce slight chance PoPs this afternoon over the central
to southeast part of the forecast area. As mentioned in the
earlier discussion below, HRRR continues to advertise convection
toward 22z with the National Blend of Models hourly Precipitation
Potential Index also increasing in PoP value from just a few hours
ago. There may be refinement to the area and adjustments to the
PoP value as confidence grows or diminishes. If convection does
form, it may impact the northern part of the heat advisory area.
However, if current timing holds, heat indices will still be able
to reach around 105 degrees, though the duration may be shortened
a bit. Otherwise, routine update with the remainder of the
forecast on track at this time.

&&

.DISCUSSION.../Today through Wednesday/
Issued at 350 AM CDT Thu Jun 28 2018

GOES-East clean infrared channel shows a band of clouds over
southwest Iowa into central Missouri early this morning. While
conditions are warm and humid here, they are even more so south of
this band of clouds with 3am temperatures in the low 80s and
dewpoints in the upper 70s. Isolated convection has formed over
central Missouri in an environment characterized by MUCAPE of 5000
J/kg (!) that is uninhibited. Closer to Iowa, a few showers are
over far south central Iowa. Many of the convective allowing
models (CAMs) along with the HREF show this activity festering
and then sinking south into Missouri no later than mid-morning.
Attention then turns to northeast Colorado and western Nebraska
where a few thunderstorms have formed this morning. This would be
the MCS that models have been indicating would slide through Iowa
later today, though in its present form does not look very
MCSish. The CAMs have little in the way of this making it into
Iowa, though recent runs of the HRRR tries to develop convection
this afternoon on an outflow boundary expected from morning
convection. Will hold off on mention of PoPs at this time, but
will be something to monitor through the rest of the morning
hours. While there will be a mixture of clouds and sunshine today,
850mb temperatures will climb 5 to 7 degrees Celsius into the low
20s Celsius in most areas. This will mean surface temperatures in
the upper 80s to low 90s and within this very moist airmass, will
see heat indices to around 105 degrees over many parts of south
central Iowa. Therefore, will be issuing a heat advisory for much
of south central Iowa. With heat indices not dropping below the
middle 70s, will run the advisory through the night and into the
heat advisory already out for Friday.

The upper level ridge will begin to slide east on Friday with
southwesterly flow developing overhead as a trough digs into the
northern Rockies. 850mb temperatures over central Iowa will once
again climb a few degrees and range from 24 to 27 Celsius. This
will equate to temperatures well into the 90s and current heat
advisory is still very much on track. It will also be quite breezy
Friday. A cold front will begin to sink toward Iowa late in the
day with any storms confined to the far northwest part of the
forecast area. The better chance of areawide thunderstorms will be
Saturday afternoon into the night as the front moves farther into
the state with the trough swinging into the area. With this front
arriving, this should temper the heat over at least northern
areas, but there is still uncertainty to what degree conditions
will heat up on Saturday over the south and less so southeast.
Within this hot and humid airmass, there will be a risk of severe
weather. There will be an impressive amount of instability ahead
of the front for storms. While deep layer shear is below 30 knots,
0-1km and 0-3km storm relative helicity would support brief, but
not persistent rotation. However, given the magnitude of CAPE,
still could have supercells with large hail and damaging wind
gusts. LCL heights of 1500m would suggest the tornado threat would
be more marginal. In addition to the severe threat, there will
also be the risk of heavy rainfall. There will be good moisture
transport into the state with a ribbon of 2 inches plus of
precipitable water ahead of the front. Warm cloud depths will be
in excess of 4000 meters, which should allow for efficient rain
processes. Further, the 850-300mb flow will be nearly parallel to
the boundary with the possibility of training storms. Models
generally agree on the idea of 1 to 3 inches, with GFS showing the
upper end potential towards 5 inches. For now, have 1 to 2 inches
across central to northern Iowa.

The trough will exit the area on Sunday and storm chances will end
in the morning hours. Surface high pressure will cross the area
later Sunday into Monday as winds from the northwest deliver drier
and cooler air. However, showers and thunderstorms will return to
the state as warm air advection commences Monday night into Tuesday.

&&

.AVIATION.../For the 12Z TAFS through 12Z Friday morning/
Issued at 535 AM CDT Thu Jun 28 2018

Visibilities will bounce between MVFR and LIFR at MCW with patchy
dense fog through 14z. Otherwise, VFR conditions are expected
through the remainder of the period at the terminals. There is a
low chance of a few isolated storms this afternoon, but confidence
is too low to include at this time. Low level wind shear will
begin to develop after 6z as winds at FL020 increase to 40 to 45
knots.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory from 1 PM this afternoon to 8 PM CDT Friday for
IAZ057>061-070>074-081>085-092>097.

Heat Advisory from 11 AM to 8 PM CDT Friday for IAZ004>007-
015>017-023>028-033>039-044>050-062-075-086.

&&

UPDATE...Cogil
DISCUSSION...Ansorge
AVIATION...Ansorge

Hazardous weather outlook, Jun 28, 8:29 AM CDT, 3 hours 43 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
829 AM CDT Thu Jun 28 2018

IAZ061-074-084-085-095>097-291330-
Jasper-Marion-Lucas-Monroe-Wayne-Appanoose-Davis-
829 AM CDT Thu Jun 28 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Heat and humidity will build into the area today. A Heat Advisory
is in effect for the area. Please refer to the National Weather
Service website at weather.gov/desmoines for further details.

Isolated storms are also possible this afternoon central and
southeast.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Hot and humid weather will persist into Friday with widespread
highs in the mid to upper 90s. A heat advisory remains in effect
through Friday. Please refer to the National Weather Service
website at weather.gov/desmoines for further details.

Strong to perhaps severe thunderstorms with heavy rainfall will
then be possible late Saturday afternoon and Saturday night.
Additional thunderstorms chances return Tuesday as well with the
severe potential better defined in the coming days.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed for a time late Saturday.

IAZ004>007-015>017-023>028-033>039-048>050-062-075-086-291330-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Story-Marshall-Tama-
Poweshiek-Mahaska-Wapello-
829 AM CDT Thu Jun 28 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Flood Warnings remain in effect for portions of some rivers in
the area. Please refer to the National Weather Service website at
weather.gov/desmoines for further details.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Hot and humid weather will return Friday with highs in the middle
to upper 90s and heat index values 103 to 110 degrees. A Heat
Advisory is in effect from late Friday morning through early
Friday evening. Please refer to the National Weather Service
website at weather.gov/desmoines for further details.

Strong to perhaps severe thunderstorms with heavy rainfall will
then be possible late Saturday afternoon and Saturday night.
Additional thunderstorms chances return Tuesday with the severe
potential better defined in the coming days.

Flood Warnings are expected to continue for portions of some
rivers in the area into next week. Please refer to the National
Weather Service website at weather.gov/desmoines for further
details.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed for a time late Saturday.

IAZ044>047-057>060-070>073-081>083-092>094-291330-
Crawford-Carroll-Greene-Boone-Audubon-Guthrie-Dallas-Polk-Cass-
Adair-Madison-Warren-Adams-Union-Clarke-Taylor-Ringgold-Decatur-
829 AM CDT Thu Jun 28 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Flood Warnings remain in effect for portions of some rivers in
the area. Please refer to the National Weather Service website at
weather.gov/desmoines for further details.

Severe thunderstorms are possible late this morning and early into
the afternoon. A severe thunderstorm watch is in effect for the
area until 3 PM. The primary threats are for large hail and wind
gusts up to 70 MPH likely.

Heat and humidity will build into the area today. A Heat Advisory
is in effect for the area. Please refer to the National Weather
Service website at weather.gov/desmoines for further details.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Hot and humid weather will return Friday with highs in the middle
to upper 90s and heat index values 103 to 110 degrees. A Heat
Advisory is in effect from late Friday morning through early
Friday evening. Please refer to the National Weather Service
website at weather.gov/desmoines for further details.

Strong to perhaps severe thunderstorms with heavy rainfall will
then be possible late Saturday afternoon and Saturday night.
Additional thunderstorms chances return Tuesday with the severe
potential better defined in the coming days.

Flood Warnings are expected to continue for portions of some
rivers in the area into next week. Please refer to the National
Weather Service website at weather.gov/desmoines for further
details.

.SPOTTER INFORMATION STATEMENT...

Spotters will likely be needed Thursday morning through afternoon. Spotters
may be needed for a time late Saturday.

In the hours before

Local storm report, Jun 28, 11:53 AM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1153 AM CDT THU JUN 28 2018

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

1145 AM     TSTM WND GST     1 NE CRESTON            41.07N 94.35W
06/28/2018  E60 MPH          UNION              IA   AMATEUR RADIO

            ELECTRICITY IS OUT.

&&

Local storm report, Jun 28, 11:54 AM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1154 AM CDT THU JUN 28 2018

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

1125 AM     TSTM WND DMG     GREENFIELD              41.31N 94.46W
06/28/2018                   ADAIR              IA   EMERGENCY MNGR

            IN GREENFIELD AND FONTANELLE. 8 TO 10 INCH
            DIAMETER TREES DOWN...BRANCHES, FENCES DOWN.
            GREENHOUSE BLOWN OVER AT SHOPKO IN
            GREENFIELD. DIME SIZE HAIL WITH HIGH WINDS
            AND HEAVY RAIN IN STUART. TIME ESTIMATED.

&&

BF

Local storm report, Jun 28, 11:56 AM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1156 AM CDT THU JUN 28 2018

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

1150 AM     TSTM WND DMG     1 ESE CRESTON           41.05N 94.35W
06/28/2018                   UNION              IA   AMATEUR RADIO

            POWERLINES DOWN ALONG HIGHWAY 34 IN CRESTON.

&&

Local storm report, Jun 28, 11:59 AM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1159 AM CDT THU JUN 28 2018

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

1140 AM     TSTM WND GST     CRESTON                 41.06N 94.36W
06/28/2018  M69 MPH          UNION              IA   AWOS

            AT CRESTON AIRPORT.

&&

BF

Local storm report, Jun 28, 12:00 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1200 PM CDT THU JUN 28 2018

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

1156 AM     TSTM WND GST     WINTERSET               41.34N 94.01W
06/28/2018  E60 MPH          MADISON            IA   TRAINED SPOTTER

            BRANCHES DOWN AT LOCATION IN WINTERSET. WIND
            ESTIMATED.

&&

JJ

Local storm report, Jun 28, 12:09 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1209 PM CDT THU JUN 28 2018

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

1128 AM     TSTM WND GST     5 N LENOX               40.96N 94.56W
06/28/2018  E65 MPH          ADAMS              IA   PUBLIC

            VIDEO VIA SOCIAL MEDIA.

&&

AK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 10:08 AM CDT	Severe Thunderstorm Warning	DMX	Crawford	37 min
Jun 28, 10:30 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Cass, Crawford	60 min
Jun 28, 11:01 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Audubon, Cass, Guthrie	59 min
Jun 28, 11:26 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Clarke, Decatur, Madison, Ringgold and 2 more	64 min
Jun 28, 11:51 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Madison, Warren	39 min
Jun 28, 12:04 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas, Ringgold, Warren, Wayne	56 min
Jun 28, 12:38 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Mahaska, Marion, Monroe, Wayne	67 min
Jun 28, 12:57 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Decatur, Wayne	48 min
Jun 28, 1:06 PM CDT	Severe Thunderstorm Warning	DMX	Davis, Mahaska, Wapello	54 min
Jun 28, 3:42 PM CDT	Excessive Heat Warning	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 4 more	29 hr
Jun 28, 3:42 PM CDT	Heat Advisory	DMX	Adair, Audubon, Cass, Dallas, Guthrie, Jasper and 4 more	29 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2018 Every severe thunderstorm warning in 2018

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.