Alert archive / Illinois / Mesoscale Discussions in 2015

Mesoscale Discussion 595

May 10, 201528 counties in Illinois; 15 counties in Iowa

The Storm Prediction Center issued this mesoscale discussion at May 10, 2015, 5:17 PM CDT for 28 counties in Illinois; 15 counties in Iowa. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
May 10, 2015, 5:17 PM CDT (22:17 UTC)
Expired
May 10, 2015, 6:45 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 43 counties

Cedar County, IA, Clinton County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Washington County, IA, Brown County, IL, Bureau County, IL, Carroll County, IL, Cass County, IL, Christian County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, Lee County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Mercer County, IL, Morgan County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Sangamon County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Woodford County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.3 hours before the alert went out and 182 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, Lincoln, IL at 12:00Z on 2015-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 66 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, Lincoln, IL at 12:00Z on 2015-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 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
66 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
777 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
142 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
May 10, 3:52 PM CDTMesoscale DiscussionSPCAdams, Alexander, Bond, Brown, Calhoun, Clinton and 24 more68 min
May 10, 4:02 PM CDTSevere Thunderstorm WatchSPCAlexander, Bond, Calhoun, Clinton, Fayette, Franklin and 23 more4 hr
May 10, 6:30 PM CDTMesoscale DiscussionSPCAlexander, Bond, Christian, Clay, Clinton, Edwards and 31 more90 min
May 10, 10:24 AM CDTMesoscale DiscussionSPCAudubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 16 more3 hr
May 10, 10:46 AM CDTTornado WatchSPCAdair, Audubon, Buena Vista, Calhoun, Carroll, Cass and 21 more8 hr
May 10, 11:52 AM CDTMesoscale DiscussionSPCAdams, Decatur, Fremont, Page, Ringgold, Taylor2 hr
May 10, 1:47 PM CDTSevere Thunderstorm WatchSPCAdams, Fremont, Mills, Montgomery, Page, Ringgold and 2 more8 hr
May 10, 2:43 PM CDTMesoscale DiscussionSPCAdams, Audubon, Buena Vista, Cass, Cherokee, Crawford and 11 more92 min
May 10, 3:13 PM CDTMesoscale DiscussionSPCPage92 min

Nearby

Mesoscale Discussions in Illinois, 2015Mesoscale Discussions in Iowa, 2015Every 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.