Alert archive / Iowa / Mesoscale Discussions in 2016

Mesoscale Discussion 578

May 9, 201621 counties in Iowa; Atchison County, Holt County, Nodaway County, Missouri; 12 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 9, 2016, 10:06 PM CDT for 21 counties in Iowa; Atchison County, Holt County, Nodaway County, Missouri; 12 counties in Nebraska. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
May 9, 2016, 10:06 PM CDT (03:06 UTC)
Expired
May 9, 2016, 11:00 PM CDT
In force
54 min
Issued by
the Storm Prediction Center
All 36 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Ida County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Taylor County, IA, Woodbury County, IA, Atchison County, MO, Holt County, MO, Nodaway County, MO, Burt County, NE, Cuming County, NE, Dakota County, NE, Douglas County, NE, Madison County, NE, Nemaha County, NE, Richardson County, NE, Sarpy County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 26 km from the middle of the area, began a volume at 03:10 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 nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.1 hours before the alert went out and 26 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 2016-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 37 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 2016-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 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
37 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
2626 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 9, 7:33 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Carroll, Cass, Crawford and 8 more57 min
May 9, 7:23 PM CDTTornado WatchSPCDunklin, Pemiscot8 hr
May 9, 8:16 PM CDTSevere Thunderstorm WatchSPCBollinger, Butler, Cape Girardeau, Carter, Iron, Madison and 8 more6 hr
May 9, 9:42 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Mississippi, New Madrid, Perry, Scott and 1 more93 min
May 9, 10:37 PM CDTMesoscale DiscussionSPCBarry, Barton, Cedar, Christian, Dade, Dallas and 10 more83 min
May 10, 7:01 AM CDTMesoscale DiscussionSPCIron, Jefferson, Madison, Perry, Sainte Genevieve, Saint Francois104 min
May 10, 12:59 PM CDTSevere Thunderstorm WatchSPCCape Girardeau, Mississippi, New Madrid, Scott, Stoddard9 hr
May 10, 3:08 PM CDTMesoscale DiscussionSPCMississippi67 min
May 10, 2:42 PM CDTMesoscale DiscussionSPCAntelope, Boone, Boyd, Cedar, Colfax, Cuming and 17 more93 min
May 10, 3:18 PM CDTMesoscale DiscussionSPCBuffalo, Franklin, Furnas, Gosper, Harlan, Kearney and 3 more117 min
May 10, 6:14 PM CDTMesoscale DiscussionSPCAdams, Antelope, Boone, Buffalo, Butler, Clay and 26 more91 min
May 10, 6:29 PM CDTSevere Thunderstorm WatchSPCAdams, Boone, Buffalo, Butler, Clay, Colfax and 26 more6 hr

Nearby

Mesoscale Discussions in Iowa, 2016Mesoscale Discussions in Nebraska, 2016Mesoscale Discussions in Missouri, 2016Every mesoscale discussion in 2016

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.