Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 1870

October 13, 20148 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Oct 13, 2014, 11:59 AM CDT for 8 counties in Missouri. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
Oct 13, 2014, 11:59 AM CDT (16:59 UTC)
Expired
Oct 13, 2014, 1:00 PM CDT
In force
61 min
Issued by
the Storm Prediction Center

Counties Bollinger County, MO, Butler County, MO, Madison County, MO, Perry County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Paducah radar (KPAH), 136 km from the middle of the area, began a volume at 17:00 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

Little Rock, AR (KBYH), launched 12:00Z, 5.0 hours before the alert went out and 283 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, Little Rock, AR at 12:00Z on 2014-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 687 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, Little Rock, AR at 12:00Z on 2014-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 228 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
687 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
657 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
228 m²/s²
0-3 km storm-relative helicity
216 m²/s²
Significant tornado parameter
1.0
Supercell composite
7.6

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
Oct 13, 12:00 AM CDTMesoscale DiscussionSPCMcDonald, Newton90 min
Oct 13, 12:55 AM CDTSevere Thunderstorm WatchSPCBarry, Christian, Douglas, Lawrence, McDonald, Newton and 3 more7 hr
Oct 13, 1:59 AM CDTMesoscale DiscussionSPCBarry, Christian, Douglas, Lawrence, McDonald, Newton and 3 more91 min
Oct 13, 6:34 AM CDTMesoscale DiscussionSPCDunklin, Pemiscot86 min
Oct 13, 6:56 AM CDTMesoscale DiscussionSPCChristian, Douglas, Ozark, Stone, Taney64 min
Oct 13, 7:08 AM CDTTornado WatchSPCDunklin, Pemiscot7 hr
Oct 13, 8:05 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Howell, Iron and 13 more115 min
Oct 13, 10:20 AM CDTMesoscale DiscussionSPCDunklin, Pemiscot115 min
Oct 13, 10:29 AM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Franklin, Iron and 16 more8 hr
Oct 13, 11:52 AM CDTMesoscale DiscussionSPCDunklin, Pemiscot113 min
Oct 13, 12:57 PM CDTTornado WatchSPCDunklin, Pemiscot7 hr
Oct 13, 1:33 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Mississippi, New Madrid, Perry, Scott and 1 more57 min

Nearby

Mesoscale Discussions in Missouri, 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.