Alert archive / Missouri / Mesoscale Discussions in 2017

Mesoscale Discussion 875

May 27, 201724 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 27, 2017, 5:56 PM CDT for 24 counties in Missouri. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
May 27, 2017, 5:56 PM CDT (22:56 UTC)
Expired
May 27, 2017, 7:00 PM CDT
In force
64 min
Issued by
the Storm Prediction Center
All 24 counties

Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cole County, MO, Cooper County, MO, Dallas County, MO, Dent County, MO, Gasconade County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pulaski County, MO, Saline County, MO

The radar

The Springfield radar (KSGF), 142 km from the middle of the area, began a volume at 22:58 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.9 hours before the alert went out and 192 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 2017-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3187 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 2017-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 square meters per square second.1939587897Sfc1 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
3187 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
766 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
1.8
Supercell composite
9.6

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
May 27, 12:06 AM CDTSevere Thunderstorm WatchSPCBarry, Christian, Douglas, Howell, McDonald, Oregon and 4 more5 hr
May 27, 2:04 AM CDTMesoscale DiscussionSPCBarry, Christian, Douglas, Howell, McDonald, Oregon and 4 more116 min
May 27, 3:54 AM CDTMesoscale DiscussionSPCBollinger, Butler, Carter, Dunklin, Howell, Mississippi and 9 more2 hr
May 27, 4:19 AM CDTSevere Thunderstorm WatchSPCButler, Dunklin, New Madrid, Pemiscot, Ripley, Stoddard6 hr
May 27, 6:12 AM CDTMesoscale DiscussionSPCDunklin, New Madrid, Pemiscot2 hr
May 27, 9:59 AM CDTMesoscale DiscussionSPCBarton, Bates, Benton, Boone, Callaway, Camden and 47 more2 hr
May 27, 12:13 PM CDTTornado WatchSPCBarry, Barton, Bates, Benton, Bollinger, Boone and 61 more7 hr
May 27, 1:12 PM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Bollinger, Camden and 50 more93 min
May 27, 1:16 PM CDTMesoscale DiscussionSPCCape Girardeau, Mississippi, New Madrid, Pemiscot, Perry, Scott and 1 more59 min
May 27, 1:36 PM CDTSevere Thunderstorm WatchSPCCape Girardeau, Dunklin, Mississippi, New Madrid, Pemiscot, Saint Charles and 4 more7 hr
May 27, 3:29 PM CDTMesoscale DiscussionSPCBollinger, Butler, Carter, Crawford, Dent, Howell and 14 more91 min
May 27, 3:50 PM CDTMesoscale DiscussionSPCMississippi, New Madrid, Pemiscot, Scott85 min
May 27, 4:24 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Dent, Iron and 8 more66 min
May 27, 5:13 PM CDTSevere Thunderstorm Watch PDSSPCCape Girardeau, Dunklin, Mississippi, New Madrid, Pemiscot, Scott and 1 more7 hr
May 27, 6:17 PM CDTMesoscale DiscussionSPCHowell, Oregon, Ozark, Ripley, Taney58 min
May 27, 6:26 PM CDTSevere Thunderstorm WatchSPCBarton, Benton, Boone, Callaway, Camden, Cedar and 28 more3 hr

Nearby

Mesoscale Discussions in Missouri, 2017Every mesoscale discussion in 2017

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.