Alert archive / Iowa / Mesoscale Discussions in 2006

Mesoscale Discussion 447

April 6, 200616 counties in Iowa; Doniphan County, Leavenworth County, Wyandotte County, Kansas; 15 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2006, 7:12 PM CDT for 16 counties in Iowa; Doniphan County, Leavenworth County, Wyandotte County, Kansas; 15 counties in Missouri. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued
Apr 6, 2006, 7:12 PM CDT (00:12 UTC)
Expired
Apr 6, 2006, 8:15 PM CDT
In force
63 min
Issued by
the Storm Prediction Center
All 34 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Cass County, IA, Crawford County, IA, Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Doniphan County, KS, Leavenworth County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Harrison County, MO, Holt County, MO, Nodaway County, MO, Platte County, MO, Ray County, MO, Worth County, MO

The radar

The Omaha radar (KOAX), 130 km from the middle of the area, began a volume at 00:14 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, 0.2 hours before the alert went out and 130 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 2006-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 753 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 2006-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 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
753 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
2279 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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
Apr 6, 7:43 PM CDTTornado WatchSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 18 more5 hr
Apr 6, 9:51 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Buena Vista and 54 more114 min
Apr 6, 8:29 PM CDTMesoscale DiscussionSPCAllen, Anderson, Brown, Chase, Chautauqua, Clay and 28 more91 min
Apr 6, 10:21 PM CDTMesoscale DiscussionSPCLinn, Miami84 min
Apr 6, 7:53 PM CDTMesoscale DiscussionSPCMcDonald, Newton97 min
Apr 6, 11:33 PM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, Iron and 9 more3 hr
Apr 7, 9:07 AM CDTMesoscale DiscussionSPCCape Girardeau, Dunklin, Mississippi, New Madrid, Pemiscot, Scott and 1 more113 min
Apr 7, 10:20 AM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, Iron and 14 more10 hr
Apr 7, 12:52 PM CDTTornado WatchSPCSaint Charles, Saint Louis, City of Saint Louis7 hr
Apr 7, 2:22 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Dunklin, Mississippi, New Madrid, Pemiscot and 2 more113 min

Nearby

Mesoscale Discussions in Iowa, 2006Mesoscale Discussions in Missouri, 2006Mesoscale Discussions in Kansas, 2006Every mesoscale discussion in 2006

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.