Alert archive / Iowa / Special Weather Statements in 2017

Special Weather Statement, NWS Des Moines, IA

June 14, 20175 counties in Iowa

NWS Des Moines, IA issued this special weather statement at Jun 14, 2017, 9:00 PM CDT for 5 counties in Iowa. It was in force for 60 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 14, 2017, 9:00 PM CDT (02:00 UTC)
Expired: Jun 14, 2017, 10:00 PM CDT
In force: 60 min
Issued by: NWS Des Moines, IA

Counties Appanoose County, IA, Davis County, IA, Monroe County, IA, Wapello County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 117 km from the middle of the area, began a volume at 02:02 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 00:00Z, 2.0 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: 2336 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1021 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 9.4

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 14, 7:00 PM CDT, 2 hours earlier.

Area forecast discussion, Jun 14, 7:00 PM CDT, 2 hours before

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Hazardous weather outlook, Jun 14, 3:52 PM CDT, 5 hours 8 minutes before

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In the hours before

Special weather statement, Jun 14, 9:00 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 15, 5:26 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin, Grundy, Hardin	49 min
Jun 15, 5:32 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin	43 min
Jun 15, 6:00 PM CDT	Severe Thunderstorm Warning	DMX	Franklin	15 min
Jun 15, 6:06 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Butler, Grundy	39 min
Jun 15, 6:12 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin	33 min
Jun 15, 6:14 PM CDT	Severe Thunderstorm Warning	DMX	Bremer, Butler	27 min
Jun 15, 6:36 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Butler	19 min
Jun 15, 6:40 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	35 min
Jun 15, 6:44 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	46 min
Jun 15, 6:50 PM CDT	Severe Thunderstorm Warning	DMX	Cass	40 min
Jun 15, 6:52 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Butler, Grundy	23 min

Nearby

Special Weather Statements in Iowa, 2017 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.