Alert archive / Iowa / Mesoscale Discussions in 2014

Mesoscale Discussion 253

April 3, 20145 states

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2014, 1:05 AM CDT for 5 states. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2014, 1:05 AM CDT (06:05 UTC)
Expired
Apr 3, 2014, 2:00 AM CDT
In force
55 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 90 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Cass County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Fremont County, IA, Henry County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Muscatine County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Adams County, IL, Hancock County, IL, Henderson County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Schuyler County, IL, Warren County, IL, Atchison County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Doniphan County, KS, Jackson County, KS, Jewell County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Washington County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clark County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Knox County, MO, Lewis 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, Sullivan County, MO, Worth County, MO, Cass County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Thayer County, NE

The radar

The Topeka radar (KTWX), 147 km from the middle of the area, began a volume at 06:04 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, 6.1 hours before the alert went out and 124 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, Topeka, KS at 00:00Z on 2014-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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, Topeka, KS at 00:00Z on 2014-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 427 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
4 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
428 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
427 m²/s²
0-3 km storm-relative helicity
529 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.4

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
Apr 3, 2:49 AM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Bureau, Calhoun, Cass and 44 more116 min
Apr 3, 6:24 AM CDTMesoscale DiscussionSPCBond, Clay, Clinton, Effingham, Fayette, Franklin and 12 more96 min
Apr 3, 9:22 AM CDTMesoscale DiscussionSPCHardin, Massac, Pope83 min
Apr 3, 12:28 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more62 min
Apr 3, 12:46 PM CDTTornado WatchSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more4 hr
Apr 3, 3:17 PM CDTMesoscale DiscussionSPCAdams, Pike58 min
Apr 3, 4:58 PM CDTTornado WatchSPCMonroe, Randolph, Saint Clair7 hr
Apr 2, 7:25 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Barber, Butler, Chase, Clay and 32 more8 hr
Apr 2, 9:36 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Butler, Chase, Coffey and 22 more54 min
Apr 2, 9:59 PM CDTSevere Thunderstorm WatchSPCBourbon, Crawford, Johnson, Leavenworth, Linn, Miami and 1 more7 hr
Apr 3, 12:00 AM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Chase, Clay and 28 more90 min
Apr 3, 12:33 PM CDTMesoscale DiscussionSPCAllen, Bourbon, Cherokee, Crawford, Labette, Linn and 2 more87 min
Apr 3, 1:15 PM CDTTornado WatchSPCBourbon, Cherokee, Crawford8 hr
Apr 3, 9:18 AM CDTMesoscale DiscussionSPCBarry, Camden, Cedar, Christian, Dade, Dallas and 18 more57 min
Apr 3, 9:33 AM CDTTornado WatchSPCBarry, Camden, Christian, Dallas, Dent, Douglas and 19 more7 hr
Apr 3, 12:05 PM CDTMesoscale DiscussionSPCBarry, Camden, Cedar, Christian, Dade, Dallas and 19 more55 min
Apr 3, 3:48 PM CDTMesoscale DiscussionSPCBarry, Barton, Benton, Camden, Cedar, Christian and 18 more57 min
Apr 3, 4:34 PM CDTMesoscale DiscussionSPCDent, Howell, Oregon, Ozark, Shannon26 min

Nearby

Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Kansas, 2014Every 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.