Alert archive / Missouri / Mesoscale Discussions in 2015

Mesoscale Discussion 1652

August 9, 201514 counties in Iowa; 19 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Aug 9, 2015, 1:37 AM CDT for 14 counties in Iowa; 19 counties in Missouri. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Aug 9, 2015, 1:37 AM CDT (06:37 UTC)
Expired: Aug 9, 2015, 3:00 AM CDT
In force: 83 min
Issued by: the Storm Prediction Center

All 33 counties

Adams County, IA, Appanoose County, IA, Cass County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wayne County, IA, Adair County, MO, Atchison County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Knox 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

The radar

The Des Moines radar (KDMX), 148 km from the middle of the area, began a volume at 06:37 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

Topeka, KS (KFOE), launched 00:00Z, 6.6 hours before the alert went out and 203 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1534 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 1534 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 6.1

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.

Issued	Product	Office	Counties	Lasted
Aug 8, 8:36 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Cass, Clarke, Decatur, Fremont and 7 more	114 min
Aug 8, 8:51 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Cass, Clarke, Decatur, Fremont and 10 more	6 hr
Aug 8, 11:11 PM CDT	Mesoscale Discussion	SPC	Adams, Clarke, Decatur, Fremont, Montgomery, Page and 3 more	94 min
Aug 9, 1:05 PM CDT	Mesoscale Discussion	SPC	Cherokee, Lyon, Monona, O'Brien, Osceola, Plymouth and 2 more	115 min
Aug 9, 1:42 PM CDT	Severe Thunderstorm Watch	SPC	Cherokee, Ida, Lyon, O'Brien, Osceola, Plymouth and 2 more	9 hr
Aug 9, 4:03 PM CDT	Mesoscale Discussion	SPC	Cherokee, Ida, Lyon, O'Brien, Osceola, Plymouth and 2 more	117 min
Aug 9, 3:55 PM CDT	Mesoscale Discussion	SPC	Benton, Bollinger, Boone, Callaway, Camden, Cape Girardeau and 40 more	2 hr
Aug 9, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	Crawford, Dent, Franklin, Gasconade, Iron, Jefferson and 9 more	4 hr

Nearby

Mesoscale Discussions in Missouri, 2015 Mesoscale Discussions in Iowa, 2015 Every mesoscale discussion in 2015

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.