Alert archive / Iowa / Mesoscale Discussions in 2014

Mesoscale Discussion 799

June 3, 201428 counties in Iowa; 23 counties in Missouri; 5 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2014, 4:37 PM CDT for 28 counties in Iowa; 23 counties in Missouri; 5 counties in Nebraska. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jun 3, 2014, 4:37 PM CDT (21:37 UTC)
Expired
Jun 3, 2014, 6:00 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 56 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Cass County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Fremont County, IA, Guthrie County, IA, Harrison County, IA, Jefferson County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Adair County, MO, Andrew County, MO, Atchison County, MO, Clark County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon 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, Cass County, NE, Douglas County, NE, Nemaha County, NE, Sarpy County, NE, Washington County, NE

The radar

The Des Moines radar (KDMX), 117 km from the middle of the area, began a volume at 21:40 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 12:00Z, 9.6 hours before the alert went out and 207 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 12:00Z on 2014-06-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2014-06-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 172 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1541 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
172 m²/s²
0-3 km storm-relative helicity
235 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 3, 1:12 PM CDTTornado WatchSPCAdair, Adams, Audubon, Carroll, Cass, Clarke and 20 more10 hr
Jun 3, 3:48 PM CDTMesoscale DiscussionSPCAudubon, Cass, Harrison, Monona, Pottawattamie, Shelby87 min
Jun 3, 5:59 PM CDTTornado WatchSPCAdair, Adams, Appanoose, Cass, Clarke, Davis and 16 more7 hr
Jun 3, 12:41 PM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Cole, Cooper, Franklin and 14 more3 hr
Jun 3, 3:02 AM CDTMesoscale DiscussionSPCBlaine, Brown, Cherry, Grant, Hooker, Keya Paha and 6 more118 min
Jun 3, 7:00 AM CDTMesoscale DiscussionSPCBlaine, Brown, Garfield, Greeley, Holt, Howard and 6 more2 hr
Jun 3, 9:36 AM CDTSevere Thunderstorm WatchSPCBoyd, Brown, Cherry, Holt, Keya Paha, Rock and 2 more7 hr
Jun 3, 12:07 PM CDTMesoscale DiscussionSPCAntelope, Blaine, Boone, Boyd, Brown, Cedar and 15 more83 min
Jun 3, 1:20 PM CDTMesoscale DiscussionSPCArthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 7 more85 min
Jun 3, 2:37 PM CDTSevere Thunderstorm WatchSPCDawes, Sioux6 hr
Jun 3, 3:11 PM CDTTornado WatchSPCArthur, Box Butte, Cherry, Deuel, Garden, Grant and 10 more7 hr
Jun 3, 4:54 PM CDTMesoscale DiscussionSPCAdams, Blaine, Boone, Buffalo, Butler, Clay and 36 more96 min
Jun 3, 6:40 PM CDTMesoscale DiscussionSPCDawes, Sioux65 min

Nearby

Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Missouri, 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.