Alert archive / Iowa / Mesoscale Discussions in 2010

Mesoscale Discussion 1306

July 14, 20104 states

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2010, 7:37 PM CDT for 4 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jul 14, 2010, 7:37 PM CDT (00:37 UTC)
Expired
Jul 14, 2010, 9:00 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 62 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Black Hawk County, IA, Boone County, IA, Butler County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Decatur County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Nemaha County, KS, Shawnee 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, Grundy County, MO, Harrison County, MO, Holt County, MO, Linn County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Sullivan County, MO, Worth County, MO, Richardson County, NE

The radar

The Des Moines radar (KDMX), 120 km from the middle of the area, began a volume at 00:40 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 00:00Z, 0.6 hours before the alert went out and 208 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 2010-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5182 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 2010-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 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
5182 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
1163 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
209 m²/s²
Significant tornado parameter
5.4
Supercell composite
30.9

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
Jul 14, 8:17 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Black Hawk, Boone, Bremer, Butler and 21 more5 hr
Jul 14, 9:25 PM CDTMesoscale DiscussionSPCAllamakee, Clayton, Dubuque95 min
Jul 14, 10:54 PM CDTMesoscale DiscussionSPCAdair, Adams, Black Hawk, Boone, Bremer, Butler and 21 more96 min
Jul 14, 11:47 PM CDTMesoscale DiscussionSPCClayton58 min
Jul 14, 11:32 PM CDTMesoscale DiscussionSPCChase, Edwards, Harvey, McPherson, Marion, Pawnee and 4 more88 min
Jul 15, 3:20 PM CDTSevere Thunderstorm WatchSPCCheyenne, Greeley, Sherman, Wallace8 hr
Jul 15, 4:48 PM CDTMesoscale DiscussionSPCBarry, Bollinger, Butler, Cape Girardeau, Carter, Christian and 20 more87 min

Nearby

Mesoscale Discussions in Iowa, 2010Mesoscale Discussions in Missouri, 2010Mesoscale Discussions in Kansas, 2010Every mesoscale discussion in 2010

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.