Alert archive / Missouri / Mesoscale Discussions in 2018

Mesoscale Discussion 1085

July 19, 201816 counties in Arkansas; 33 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2018, 2:15 PM CDT for 16 counties in Arkansas; 33 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 19, 2018, 2:15 PM CDT (19:15 UTC)
Expired
Jul 19, 2018, 4:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 49 counties

Baxter County, AR, Boone County, AR, Clay County, AR, Cleburne County, AR, Craighead County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Marion County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Bollinger County, MO, Butler County, MO, Carter County, MO, Christian County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Dunklin County, MO, Greene County, MO, Howell County, MO, Iron County, MO, Laclede County, MO, Madison County, MO, New Madrid County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Wayne County, MO, Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 146 km from the middle of the area, began a volume at 19:18 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

Springfield, MO (KSGF), launched 12:00Z, 7.3 hours before the alert went out and 175 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, Springfield, MO at 12:00Z on 2018-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1220 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, Springfield, MO at 12:00Z on 2018-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 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
1220 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
767 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.4

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 19, 12:47 AM CDTMesoscale DiscussionSPCAtchison, Holt118 min
Jul 19, 1:00 AM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Buchanan, Holt, Nodaway5 hr
Jul 19, 3:52 AM CDTMesoscale DiscussionSPCAtchison, Holt53 min
Jul 19, 9:58 AM CDTMesoscale DiscussionSPCAndrew, Bates, Benton, Boone, Caldwell, Callaway and 45 more2 hr
Jul 19, 11:22 AM CDTSevere Thunderstorm WatchSPCBarry, Barton, Bates, Benton, Caldwell, Callaway and 47 more10 hr
Jul 19, 12:26 PM CDTSevere Thunderstorm WatchSPCPlatte8 hr
Jul 19, 2:32 PM CDTMesoscale DiscussionSPCMercer, Putnam, Schuyler118 min
Jul 19, 2:43 PM CDTMesoscale DiscussionSPCPlatte92 min
Jul 19, 3:11 PM CDTTornado WatchSPCClark, Scotland6 hr
Jul 19, 5:18 PM CDTMesoscale DiscussionSPCClark, Schuyler, Scotland57 min
Jul 19, 6:26 PM CDTMesoscale DiscussionSPCClark, Knox, Lewis, Lincoln, Marion, Pike and 1 more64 min
Jul 19, 6:49 PM CDTSevere Thunderstorm WatchSPCKnox, Lewis, Lincoln, Marion, Pike, Ralls and 4 more7 hr

Nearby

Mesoscale Discussions in Missouri, 2018Mesoscale Discussions in Arkansas, 2018Every mesoscale discussion in 2018

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.