Alert archive / Iowa / Mesoscale Discussions in 2015

Mesoscale Discussion 1164

June 24, 201527 counties in Iowa; 11 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2015, 7:49 PM CDT for 27 counties in Iowa; 11 counties in Missouri. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Jun 24, 2015, 7:49 PM CDT (00:49 UTC)
Expired
Jun 24, 2015, 9:45 PM CDT
In force
116 min
Issued by
the Storm Prediction Center
All 38 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Guthrie County, IA, Henry County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Montgomery County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Adair County, MO, Clark County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO

The radar

The Des Moines radar (KDMX), 90 km from the middle of the area, began a volume at 00:50 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

Omaha, NE (KOAX), launched 00:00Z, 0.8 hours before the alert went out and 250 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, Omaha, NE at 00:00Z on 2015-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3546 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, Omaha, NE at 00:00Z on 2015-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 234 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
3546 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
1148 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
234 m²/s²
0-3 km storm-relative helicity
618 m²/s²
Significant tornado parameter
10.1
Supercell composite
76.0

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 24, 9:26 PM CDTSevere Thunderstorm WatchSPCBenton, Cedar, Clinton, Des Moines, Henry, Iowa and 12 more6 hr
Jun 24, 10:00 PM CDTMesoscale DiscussionSPCAppanoose, Carroll, Clarke, Dallas, Davis, Guthrie and 7 more2 hr
Jun 24, 11:23 PM CDTMesoscale DiscussionSPCDes Moines, Henry, Jefferson, Lee, Van Buren2 hr
Jun 24, 11:26 PM CDTSevere Thunderstorm WatchSPCAdair, Appanoose, Audubon, Boone, Carroll, Clarke and 17 more3 hr
Jun 25, 2:02 AM CDTMesoscale DiscussionSPCAudrain, Lincoln, Marion, Monroe, Montgomery, Pike and 4 more118 min
Jun 25, 3:55 PM CDTMesoscale DiscussionSPCLincoln, Marion, Pike, Ralls, Saint Charles, Saint Louis and 2 more2 hr
Jun 25, 4:52 PM CDTMesoscale DiscussionSPCCarroll, Cass, Chariton, Clay, Cooper, Henry and 9 more113 min
Jun 25, 4:53 PM CDTSevere Thunderstorm WatchSPCAudrain, Boone, Callaway, Cole, Franklin, Gasconade and 16 more9 hr
Jun 25, 5:53 PM CDTSevere Thunderstorm WatchSPCAndrew, Buchanan, Caldwell, Carroll, Chariton, Clay and 17 more9 hr

Nearby

Mesoscale Discussions in Iowa, 2015Mesoscale Discussions in Missouri, 2015Every mesoscale discussion in 2015

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.