Alert archive / Iowa / Special Weather Statements in 2016

Special Weather Statement, NWS Des Moines, IA

May 26, 2016Polk County, Iowa

NWS Des Moines, IA issued this special weather statement at May 26, 2016, 6:49 PM CDT for Polk County, Iowa. It was in force for 26 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: May 26, 2016, 6:49 PM CDT (23:49 UTC)
Expired: May 26, 2016, 7:15 PM CDT
In force: 26 min
Issued by: NWS Des Moines, IA

County Polk County, IA

The radar

The Des Moines radar (KDMX), 8 km from the middle of the area, began a volume at 23:53 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

Omaha, NE (KOAX), launched 12:00Z, 11.8 hours before the alert went out and 218 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1783 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -107 m²/s²
0-3 km storm-relative helicity: -78 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 May 26, 6:48 PM CDT, 1 minute earlier.

Area forecast discussion, May 26, 6:48 PM CDT, 1 minute before

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Hazardous weather outlook, May 26, 8:24 AM CDT, 10 hours 25 minutes before

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In the hours before

Local storm report, May 26, 5:20 PM CDT, 1 hour 29 minutes before

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Local storm report, May 26, 5:34 PM CDT, 1 hour 15 minutes before

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Special weather statement, May 26, 6:08 PM CDT, 41 minutes before

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Special weather statement, May 26, 6:37 PM CDT, 12 minutes before

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Special weather statement, May 26, 6:49 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
May 25, 10:13 PM CDT	Special Weather Statement	DMX	Emmet	62 min
May 25, 10:16 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	44 min
May 25, 11:13 PM CDT	Special Weather Statement	DMX	Emmet	32 min
May 26, 12:17 AM CDT	Special Weather Statement	DMX	Adams, Decatur, Ringgold, Taylor, Union	58 min
May 26, 12:45 AM CDT	Special Weather Statement	DMX	Emmet, Kossuth, Palo Alto	60 min
May 26, 1:00 AM CDT	Severe Thunderstorm Warning	DMX	Emmet, Kossuth, Palo Alto	45 min
May 26, 1:11 AM CDT	Special Weather Statement	DMX	Appanoose, Wayne	64 min
May 26, 1:41 AM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth, Winnebago	34 min
May 26, 1:56 AM CDT	Special Weather Statement	DMX	Carroll, Crawford, Sac	64 min
May 26, 2:10 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Carroll, Cass, Crawford, Greene and 1 more	50 min
May 26, 2:30 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk	45 min
May 26, 2:42 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Worth	28 min
May 26, 2:54 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Calhoun, Carroll, Dallas, Greene, Guthrie and 4 more	51 min
May 26, 3:21 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Polk, Story	39 min
May 26, 3:36 AM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hardin, Marshall, Story	39 min
May 26, 4:01 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Marshall, Tama	29 min
May 26, 4:19 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Tama	26 min
May 26, 6:03 PM CDT	Flash Flood Warning	DMX	Cass	6 hr
May 26, 6:08 PM CDT	Special Weather Statement	DMX	Boone, Dallas	37 min
May 26, 6:37 PM CDT	Special Weather Statement	DMX	Warren	53 min

Nearby

Special Weather Statements in Iowa, 2016 Every special weather statement in 2016

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.