Alert archive / Iowa / Mesoscale Discussions in 2014

Mesoscale Discussion 1198

June 29, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2014, 5:14 PM CDT for 4 states. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Jun 29, 2014, 5:14 PM CDT (22:14 UTC)
Expired
Jun 29, 2014, 6:45 PM CDT
In force
91 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 35 counties

Allamakee County, IA, Bremer County, IA, Buena Vista County, IA, Butler County, IA, Cerro Gordo County, IA, Cherokee County, IA, Chickasaw County, IA, Clay County, IA, Emmet County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Hancock County, IA, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Mitchell County, IA, O'Brien County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Webster County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Winona County, MN, Dixon County, NE, Union County, SD

The radar

The Des Moines radar (KDMX), 145 km from the middle of the area, began a volume at 22:15 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.2 hours before the alert went out and 203 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2014-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2014-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
4 J/kg
Mixed-layer CIN
-215 J/kg
Mixed-layer LCL
1253 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
140 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 29, 2:02 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 33 more118 min
Jun 29, 4:04 PM CDTTornado WatchSPCAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 40 more7 hr
Jun 29, 6:06 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 20 more84 min
Jun 29, 2:23 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Benton, Carlton, Carver, Chippewa and 26 more2 hr
Jun 29, 6:38 AM CDTMesoscale DiscussionSPCAdams, Buffalo, Chase, Clay, Custer, Dawson and 21 more97 min

Nearby

Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Minnesota, 2014Mesoscale Discussions in Nebraska, 2014Every mesoscale discussion in 2014

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.