Alert archive / Iowa / Special Weather Statements in 2018

Special Weather Statement, NWS Des Moines, IA

June 11, 2018Palo Alto County, Iowa

NWS Des Moines, IA issued this special weather statement at Jun 11, 2018, 4:45 AM CDT for Palo Alto County, Iowa. It was in force for 45 min. 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 11, 2018, 4:45 AM CDT (09:45 UTC)
Expired: Jun 11, 2018, 5:30 AM CDT
In force: 45 min
Issued by: NWS Des Moines, IA

County Palo Alto County, IA

The radar

The Sioux Falls radar (KFSD), 162 km from the middle of the area, began a volume at 09:47 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

Minneapolis, MN (KMPX), launched 00:00Z, 9.8 hours before the alert went out and 208 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: 1 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -78 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 11, 4:13 AM CDT, 32 minutes earlier.

Area forecast discussion, Jun 11, 4:13 AM CDT, 32 minutes before

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Hazardous weather outlook, Jun 10, 10:11 PM CDT, 6 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
1011 PM CDT Sun Jun 10 2018

IAZ004>007-015>017-023>026-033-034-037-038-044-045-049-050-057-
058-062-070-071-075-081-082-086-092-093-097-120315-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Sac-Calhoun-Hardin-Grundy-
Crawford-Carroll-Marshall-Tama-Audubon-Guthrie-Poweshiek-Cass-
Adair-Mahaska-Adams-Union-Wapello-Taylor-Ringgold-Davis-
1011 PM CDT Sun Jun 10 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Tonight

Scattered thunderstorms are possible tonight. Isolated severe
storms are possible with large hail and damaging winds. Heavy
rainfall could occur with any storms.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Additional thunderstorms are possible later Monday afternoon into
Monday evening. A few severe storms will be possible with the
primary threats damaging wind gusts and locally heavy rain. Large
hail and isolated tornadoes may also occur.

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

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times through Monday night.

IAZ027-028-039-120315-
Butler-Bremer-Black Hawk-
1011 PM CDT Sun Jun 10 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Tonight

Scattered thunderstorms are possible this afternoon 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 Shell Rock and Cedar
River basins. Please refer to our website at
weather.gov/desmoines for further details.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Additional thunderstorms are possible later Monday afternoon into
Monday evening. A few severe storms will be possible with the
primary threats damaging wind gusts and locally heavy rain. Large
hail and isolated tornadoes may also occur.

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

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times through Monday night.

IAZ035-036-046>048-059>061-072>074-083>085-094>096-120315-
Webster-Hamilton-Greene-Boone-Story-Dallas-Polk-Jasper-Madison-
Warren-Marion-Clarke-Lucas-Monroe-Decatur-Wayne-Appanoose-
1011 PM CDT Sun Jun 10 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Tonight

A Flash Flood Watch is in effect until 8 AM. Please refer to our
website at weather.gov/desmoines for further details.

Thunderstorms with heavy rainfall are likely tonight. Isolated
severe storms are possible with threat being large hail and
damaging winds.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Additional thunderstorms are possible later Monday afternoon into
Monday evening. A few severe storms will be possible with the
primary threats damaging wind gusts and locally heavy rain. Large
hail and isolated tornadoes may also occur.

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

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times through Monday night.

FAB

In the hours before

Special weather statement, Jun 11, 3:17 AM CDT, 1 hour 28 minutes before

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Special weather statement, Jun 11, 3:20 AM CDT, 1 hour 25 minutes before

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Special weather statement, Jun 11, 3:33 AM CDT, 1 hour 12 minutes before

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Special weather statement, Jun 11, 3:42 AM CDT, 1 hour 3 minutes before

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Special weather statement, Jun 11, 4:08 AM CDT, 37 minutes before

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Special weather statement, Jun 11, 4:45 AM 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 10, 8:23 PM CDT	Special Weather Statement	DMX	Warren	52 min
Jun 10, 8:34 PM CDT	Special Weather Statement	DMX	Dallas	41 min
Jun 10, 9:04 PM CDT	Special Weather Statement	DMX	Warren	41 min
Jun 10, 9:08 PM CDT	Severe Thunderstorm Warning	DMX	Clarke	37 min
Jun 10, 9:25 PM CDT	Special Weather Statement	DMX	Dallas	50 min
Jun 10, 9:43 PM CDT	Special Weather Statement	DMX	Polk	47 min
Jun 10, 9:53 PM CDT	Flash Flood Watch	DMX	Appanoose, Boone, Clarke, Dallas, Decatur, Greene and 11 more	10 hr
Jun 10, 10:00 PM CDT	Special Weather Statement	DMX	Lucas	60 min
Jun 10, 10:24 PM CDT	Special Weather Statement	DMX	Boone, Clarke, Dallas, Greene, Lucas, Madison and 2 more	51 min
Jun 11, 12:04 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur	41 min
Jun 11, 12:21 AM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Union	39 min
Jun 11, 12:43 AM CDT	Severe Thunderstorm Warning	DMX	Decatur, Ringgold	62 min
Jun 11, 1:37 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	42 min
Jun 11, 1:45 AM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	30 min
Jun 11, 3:13 AM CDT	Special Weather Statement	DMX	Pocahontas	47 min
Jun 11, 3:17 AM CDT	Special Weather Statement	DMX	Union	43 min
Jun 11, 3:20 AM CDT	Special Weather Statement	DMX	Adair, Cass	40 min
Jun 11, 3:33 AM CDT	Special Weather Statement	DMX	Audubon	42 min
Jun 11, 3:42 AM CDT	Special Weather Statement	DMX	Palo Alto	63 min
Jun 11, 4:08 AM CDT	Special Weather Statement	DMX	Pocahontas	52 min
Jun 11, 5:00 AM CDT	Flash Flood Warning	DMX	Palo Alto	6 hr
Jun 11, 5:32 AM CDT	Flash Flood Warning	DMX	Audubon, Cass	6 hr
Jun 11, 6:41 AM CDT	Special Weather Statement	DMX	Emmet	49 min
Jun 11, 7:39 AM CDT	Special Weather Statement	DMX	Boone, Hamilton, Jasper, Marshall, Polk, Story	3 hr
Jun 11, 11:10 AM CDT	Special Weather Statement	DMX	Audubon	35 min
Jun 11, 11:14 AM CDT	Special Weather Statement	DMX	Cass	31 min
Jun 11, 11:50 AM CDT	Special Weather Statement	DMX	Adair	25 min
Jun 11, 11:53 AM CDT	Special Weather Statement	DMX	Adams	37 min
Jun 11, 6:11 PM CDT	Severe Thunderstorm Warning	DMX	Cass	32 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.