Alert archive / Missouri / Mesoscale Discussions in 2008

Mesoscale Discussion 522

March 31, 200817 counties in Illinois; 11 counties in Iowa; 28 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2008, 1:09 PM CDT for 17 counties in Illinois; 11 counties in Iowa; 28 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 31, 2008, 1:09 PM CDT (18:09 UTC)
Expired
Mar 31, 2008, 3:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 56 counties

Appanoose County, IA, Davis County, IA, Decatur 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, Wayne County, IA, Adams County, IL, Brown County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Mercer County, IL, Peoria County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Adair County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clark County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Jackson County, MO, Knox County, MO, Lafayette County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO

The radar

The St Louis radar (KLSX), 208 km from the middle of the area, began a volume at 18:13 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, 6.2 hours before the alert went out and 240 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, Davenport, at 12:00Z on 2008-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Davenport, at 12:00Z on 2008-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 230 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
434 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
230 m²/s²
0-3 km storm-relative helicity
293 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
Mar 31, 8:53 AM CDTMesoscale DiscussionSPCBureau, Cass, DeKalb, DeWitt, DuPage, Ford and 24 more2 hr
Mar 31, 1:10 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clinton, Greene, Jersey, Macoupin and 6 more35 min
Mar 31, 1:45 PM CDTTornado WatchSPCCalhoun, Greene, Jersey, Macoupin, Madison, Monroe and 2 more6 hr
Mar 31, 2:30 AM CDTMesoscale DiscussionSPCLyon5 hr
Mar 31, 3:06 AM CDTSevere Thunderstorm WatchSPCFremont, Mills, Montgomery, Page, Pottawattamie3 hr
Mar 31, 3:31 AM CDTMesoscale DiscussionSPCAdams, Clarke, Decatur, Ringgold, Taylor, Union and 1 more59 min
Mar 31, 5:59 AM CDTMesoscale DiscussionSPCAdams, Appanoose, Clarke, Decatur, Fremont, Montgomery and 5 more91 min
Mar 31, 9:48 AM CDTMesoscale DiscussionSPCLyon, Osceola6 hr
Mar 31, 4:09 AM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Buchanan, Caldwell, Clinton, Daviess and 9 more3 hr
Mar 31, 7:50 AM CDTMesoscale DiscussionSPCBarton, Bates, Cedar, Dade, Jasper, Newton and 1 more85 min
Mar 31, 8:44 AM CDTTornado WatchSPCBarry, Barton, Benton, Camden, Cedar, Christian and 23 more7 hr
Mar 31, 10:30 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Camden, Cedar and 24 more60 min
Mar 31, 3:04 PM CDTMesoscale DiscussionSPCBarry, Christian, Dent, Douglas, Greene, Howell and 11 more26 min
Mar 31, 3:45 PM CDTTornado WatchSPCBarry, Christian, Dent, Douglas, Howell, Laclede and 10 more7 hr
Mar 31, 5:28 PM CDTMesoscale DiscussionSPCButler, Dunklin, Ripley, Wayne62 min
Mar 31, 6:12 PM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, New Madrid and 6 more7 hr

Nearby

Mesoscale Discussions in Missouri, 2008Mesoscale Discussions in Illinois, 2008Mesoscale Discussions in Iowa, 2008Every mesoscale discussion in 2008

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.