Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 1428

July 22, 2014Hancock County, Henderson County, Illinois; 9 counties in Iowa; 10 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2014, 7:16 AM CDT for Hancock County, Henderson County, Illinois; 9 counties in Iowa; 10 counties in Missouri. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Jul 22, 2014, 7:16 AM CDT (12:16 UTC)
Expired: Jul 22, 2014, 9:15 AM CDT
In force: 119 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 21 counties

Appanoose County, IA, Davis County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Lee County, IA, Louisa County, IA, Van Buren County, IA, Wapello County, IA, Hancock County, IL, Henderson County, IL, Adair County, MO, Clark County, MO, Grundy County, MO, Knox County, MO, Lewis County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO

The radar

The Des Moines radar (KDMX), 174 km from the middle of the area, began a volume at 12:15 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

Davenport, (KDVN), launched 12:00Z, 0.3 hours before the alert went out and 198 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: 1357 J/kg
Mixed-layer CIN: -311 J/kg
Mixed-layer LCL: 1052 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.5

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.

Issued	Product	Office	Counties	Lasted
Jul 22, 5:54 PM CDT	Mesoscale Discussion	SPC	Boone, DeKalb, Kane, Lake, McHenry, Ogle and 2 more	2 hr

Nearby

Mesoscale Discussions in Missouri, 2014 Mesoscale Discussions in Iowa, 2014 Mesoscale Discussions in Illinois, 2014 Every mesoscale discussion in 2014

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.