Alert archive / Iowa / Special Weather Statements in 2018

Special Weather Statement, NWS Des Moines, IA

June 10, 2018Audubon County, Iowa

NWS Des Moines, IA issued this special weather statement at Jun 10, 2018, 1:49 PM CDT for Audubon County, Iowa. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 10, 2018, 1:49 PM CDT (18:49 UTC)
Expired: Jun 10, 2018, 4:45 PM CDT
In force: 3 hr
Issued by: NWS Des Moines, IA

County Audubon County, IA

The radar

The Des Moines radar (KDMX), 103 km from the middle of the area, began a volume at 18:52 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.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 6.8 hours before the alert went out and 370 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: 351 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 594 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 359 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 10, 12:41 PM CDT, 1 hour 8 minutes earlier.

Area forecast discussion, Jun 10, 12:41 PM CDT, 1 hour 8 minutes before

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Hazardous weather outlook, Jun 10, 4:48 AM CDT, 9 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Des Moines IA
448 AM CDT Sun Jun 10 2018

IAZ004>006-015-016-023>025-033>038-044>050-057>062-070>075-
081>086-092>097-111000-
Emmet-Kossuth-Winnebago-Palo Alto-Hancock-Pocahontas-Humboldt-
Wright-Sac-Calhoun-Webster-Hamilton-Hardin-Grundy-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-
448 AM CDT Sun Jun 10 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Scattered thunderstorms are possible today and into tonight.
Isolated severe storms are possible with large hail and damaging
winds. Locally heavy rainfall could occur with any storms.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Additional storms are possible Monday afternoon and night. A few
severe storms will be possible with large hail and damaging winds.
Isolated tornadoes may also occur. In addition, locally heavy
rainfall may occur.

Scattered storms are possible at times from Wednesday night
through Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times through Monday night.

IAZ007-017-026>028-039-111000-
Worth-Cerro Gordo-Franklin-Butler-Bremer-Black Hawk-
448 AM CDT Sun Jun 10 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Scattered thunderstorms are possible today and into tonight.
Isolated severe storms are possible with large hail and damaging
winds. Locally heavy rainfall could occur with any storms.

River Flood Warnings are in effect along the Winnebago, Shell Rock
and Cedar River basins.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Additional storms are possible Monday afternoon and night. A few
severe storms will be possible with large hail and damaging winds.
Isolated tornadoes may also occur. In addition, locally heavy
rainfall may occur.

Scattered storms are possible at times from Wednesday night
through Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times through Monday night.

In the hours before

Special weather statement, Jun 10, 7:52 AM CDT, 5 hours 57 minutes before

Special Weather Statement
National Weather Service Des Moines IA
752 AM CDT SUN JUN 10 2018

IAZ047-048-101330-
Story IA-Boone IA-
752 AM CDT SUN JUN 10 2018

...Nickel Size Hail Possible...

At 749 AM CDT, Doppler radar was tracking a strong thunderstorm near
Boone Speedway, or near Boone, moving east at 35 mph. At 737 AM CDT,
a mix of nickel and penny size hail was reported near Boone.

Nickel size hail will be possible with this storm.

Locations impacted include...
Ames, Boone, Huxley, Boone Speedway, Cambridge, Kelley, Luther, Boone
Municipal Airport, Ledges State Park and Ames Municipal Airport.

LAT...LON 4196 9340 4186 9356 4186 9361 4199 9390
      4206 9386
TIME...MOT...LOC 1249Z 289DEG 29KT 4200 9381

Krull

Local storm report, Jun 10, 9:11 AM CDT, 4 hours 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
911 AM CDT SUN JUN 10 2018

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

0700 AM     HEAVY RAIN       1 N CEDAR FALLS         42.53N 92.45W
06/10/2018  M2.22 INCH       BLACK HAWK         IA   COCORAHS

            24 HOUR TOTAL.

&&

ANSORGE

Local storm report, Jun 10, 9:12 AM CDT, 4 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
912 AM CDT SUN JUN 10 2018

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

0700 AM     HEAVY RAIN       TRIPOLI                 42.81N 92.26W
06/10/2018  M3.70 INCH       BREMER             IA   CO-OP OBSERVER

            24 HOUR TOTAL.

&&

ANSORGE

Local storm report, Jun 10, 9:14 AM CDT, 4 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
914 AM CDT SUN JUN 10 2018

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

0700 AM     HEAVY RAIN       1 NNE MASON CITY        43.17N 93.19W
06/10/2018  M2.72 INCH       CERRO GORDO        IA   CO-OP OBSERVER

            24 HOUR TOTAL.

&&

ANSORGE

Special weather statement, Jun 10, 12:42 PM CDT, 1 hour 7 minutes before

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Special weather statement, Jun 10, 1:49 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 7:21 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin	54 min
Jun 9, 7:30 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	45 min
Jun 9, 7:46 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin	29 min
Jun 9, 8:51 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Tama	54 min
Jun 9, 9:13 PM CDT	Severe Thunderstorm Warning	DMX	Grundy	32 min
Jun 9, 9:17 PM CDT	River Flood Warning	DMX	Cerro Gordo, Floyd, Worth	12 hr
Jun 9, 9:23 PM CDT	River Flood Warning	DMX	Black Hawk	6 days
Jun 9, 9:29 PM CDT	River Flood Warning	DMX	Black Hawk, Bremer, Butler	58 hr
Jun 9, 9:31 PM CDT	River Flood Watch	DMX	Black Hawk, Bremer, Butler	13 hr
Jun 9, 9:32 PM CDT	River Flood Watch	DMX	Black Hawk	13 hr
Jun 9, 9:48 PM CDT	Areal Flood Warning	DMX	Cerro Gordo	12 hr
Jun 10, 5:23 AM CDT	Special Weather Statement	DMX	Crawford, Sac	37 min
Jun 10, 5:40 AM CDT	Areal Flood Warning	DMX	Butler	24 hr
Jun 10, 5:58 AM CDT	Special Weather Statement	DMX	Audubon, Carroll, Crawford, Sac	47 min
Jun 10, 6:35 AM CDT	Special Weather Statement	DMX	Audubon, Calhoun, Carroll, Cass, Greene, Guthrie	40 min
Jun 10, 7:47 AM CDT	Special Weather Statement	DMX	Cass	43 min
Jun 10, 7:52 AM CDT	Special Weather Statement	DMX	Story	38 min
Jun 10, 10:22 AM CDT	River Flood Warning	DMX	Black Hawk	3 days
Jun 10, 12:42 PM CDT	Special Weather Statement	DMX	Audubon	48 min

Nearby

Special Weather Statements in Iowa, 2018 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.