Alert archive / Iowa / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 60, NWS Des Moines, IA

June 4, 2019Emmet County, Palo Alto County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 4, 2019, 10:41 PM CDT for Emmet County, Palo Alto County, Iowa. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 4, 2019, 10:41 PM CDT (03:41 UTC)
Expired: Jun 4, 2019, 11:30 PM CDT
In force: 49 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Emmet County, IA, Palo Alto County, IA

The radar

The Sioux Falls radar (KFSD), 170 km from the middle of the area, began a volume at 03:41 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 00:00Z, 3.7 hours before the alert went out and 254 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: 1349 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1567 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.4

Open this sounding in Storm Lab

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 4, 6:38 PM CDT, 4 hours 3 minutes earlier.

Area forecast discussion, Jun 4, 6:38 PM CDT, 4 hours 3 minutes before

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Hazardous weather outlook, Jun 4, 3:47 PM CDT, 6 hours 54 minutes before

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In the hours before

Special weather statement, Jun 4, 6:13 PM CDT, 4 hours 28 minutes before

Special Weather Statement
National Weather Service Des Moines IA
613 PM CDT Tue Jun 4 2019

IAZ006-007-050115-
Winnebago-Worth-
Including the cities of Forest City, Lake Mills, Northwood,
and Manly
613 PM CDT Tue Jun 4 2019

...Gusty North Winds This Evening...

Thunderstorms in southern Minnesota are producing gusty north
winds that will be moving into far northern Iowa over the next
hour. Winds may reach 30 to 35 mph over Worth and Winnebago
Counties as a gust front enters the region early this evening.
Showers and thunderstorms are still possible as well this evening.
A severe thunderstorm watch is in effect until 11 pm CDT this
Tuesday evening.

REV

Special weather statement, Jun 4, 8:00 PM CDT, 2 hours 41 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 4, 11:36 PM CDT	Special Weather Statement	DMX	Kossuth, Palo Alto	24 min
Jun 5, 12:10 AM CDT	Special Weather Statement	DMX	Cerro Gordo, Hancock, Humboldt, Pocahontas, Wright	35 min
Jun 5, 12:52 AM CDT	Special Weather Statement	DMX	Bremer, Butler, Grundy, Hamilton, Hardin	38 min
Jun 5, 1:30 AM CDT	Special Weather Statement	DMX	Boone, Grundy, Marshall, Story, Tama	45 min
Jun 5, 2:18 AM CDT	Special Weather Statement	DMX	Jasper, Poweshiek	42 min
Jun 5, 6:14 AM CDT	Special Weather Statement	DMX	Marshall, Story, Tama	61 min
Jun 5, 6:44 AM CDT	Special Weather Statement	DMX	Tama	31 min
Jun 5, 6:56 AM CDT	Special Weather Statement	DMX	Jasper, Tama	64 min
Jun 5, 7:15 AM CDT	Severe Thunderstorm Warning	DMX	Jasper	11 min
Jun 5, 8:33 AM CDT	Special Weather Statement	DMX	Wapello	42 min
Jun 5, 8:37 AM CDT	Special Weather Statement	DMX	Ringgold	38 min
Jun 5, 9:13 AM CDT	Special Weather Statement	DMX	Davis	17 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2019 Every severe thunderstorm warning in 2019

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.