Alert archive / Missouri / Mesoscale Discussions in 2015

Mesoscale Discussion 930

June 7, 2015Adams County, Hancock County, Henderson County, Illinois; 6 counties in Iowa; 24 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2015, 6:21 PM CDT for Adams County, Hancock County, Henderson County, Illinois; 6 counties in Iowa; 24 counties in Missouri. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Jun 7, 2015, 6:21 PM CDT (23:21 UTC)
Expired
Jun 7, 2015, 7:45 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 33 counties

Davis County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Lee County, IA, Van Buren County, IA, Adams County, IL, Hancock County, IL, Henderson County, IL, Adair County, MO, Andrew County, MO, Caldwell County, MO, Chariton County, MO, Clark County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO

The radar

The Des Moines radar (KDMX), 184 km from the middle of the area, began a volume at 23:22 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

Davenport, (KDVN), launched 12:00Z, 11.4 hours before the alert went out and 245 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, Davenport, at 12:00Z on 2015-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 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, Davenport, at 12:00Z on 2015-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 179 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
31 J/kg
Mixed-layer CIN
-310 J/kg
Mixed-layer LCL
862 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
179 m²/s²
0-3 km storm-relative helicity
226 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 7, 1:52 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, DeWitt, Ford, Fulton and 18 more53 min
Jun 7, 2:36 PM CDTSevere Thunderstorm WatchSPCBoone, Bureau, Cass, Champaign, Coles, DeKalb and 33 more5 hr
Jun 7, 3:33 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Hancock, Henderson4 hr
Jun 7, 5:34 PM CDTMesoscale DiscussionSPCBureau, Champaign, DeWitt, Douglas, Ford, Fulton and 23 more86 min
Jun 6, 8:11 PM CDTMesoscale DiscussionSPCCherokee, Ida, Lyon, Monona, O'Brien, Osceola and 3 more64 min
Jun 6, 8:45 PM CDTTornado WatchSPCBuena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more4 hr
Jun 6, 11:00 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 14 more2 hr
Jun 6, 11:23 PM CDTSevere Thunderstorm WatchSPCAdair, Audubon, Black Hawk, Boone, Bremer, Butler and 32 more6 hr
Jun 7, 1:56 AM CDTMesoscale DiscussionSPCAdair, Adams, Benton, Black Hawk, Bremer, Buchanan and 29 more2 hr

Nearby

Mesoscale Discussions in Missouri, 2015Mesoscale Discussions in Iowa, 2015Mesoscale Discussions in Illinois, 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.