Alert archive / Iowa / Mesoscale Discussions in 2007

Mesoscale Discussion 395

March 31, 200752 counties in Iowa; 7 counties in Missouri; 10 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2007, 10:30 AM CDT for 52 counties in Iowa; 7 counties in Missouri; 10 counties in Nebraska. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Mar 31, 2007, 10:30 AM CDT (15:30 UTC)
Expired
Mar 31, 2007, 12:00 PM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 69 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Harrison County, IA, Ida County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Keokuk County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Monona County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Webster County, IA, Woodbury County, IA, Atchison County, MO, Harrison County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Worth County, MO, Burt County, NE, Cass County, NE, Dodge County, NE, Douglas County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Sarpy County, NE, Saunders County, NE, Washington County, NE

The radar

The Des Moines radar (KDMX), 106 km from the middle of the area, began a volume at 15:31 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, 3.5 hours before the alert went out and 126 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 2007-03-31Temperature 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 2007-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 252 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
523 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
252 m²/s²
0-3 km storm-relative helicity
288 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
Mar 30, 11:44 PM CDTMesoscale DiscussionSPCAdair, Adams, Cass, Clarke, Fremont, Mills and 6 more61 min
Mar 31, 11:38 AM CDTTornado WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Buena Vista and 50 more7 hr
Mar 31, 1:47 PM CDTTornado WatchSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 37 more7 hr
Mar 31, 2:38 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Calhoun, Carroll and 29 more97 min
Mar 30, 7:12 PM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Cass, Cedar, Dade and 5 more63 min
Mar 31, 12:57 PM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Camden, Chariton, Cole and 33 more2 hr

Nearby

Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Nebraska, 2007Mesoscale Discussions in Missouri, 2007Every mesoscale discussion in 2007

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.