Alert archive / Arkansas / Mesoscale Discussions in 2022

Mesoscale Discussion 773

May 15, 20224 states

The Storm Prediction Center issued this mesoscale discussion at May 15, 2022, 3:28 PM CDT for 4 states. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
May 15, 2022, 3:28 PM CDT (20:28 UTC)
Expired
May 15, 2022, 5:00 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 218
All 30 counties

Clay County, AR, Cleburne County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Greene County, AR, Independence County, AR, Jackson County, AR, Lawrence County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Sharp County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO, Pemiscot County, MO, DeSoto County, MS, Tunica County, MS, Lauderdale County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 107 km from the middle of the area, began a volume at 20:30 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, 8.5 hours before the alert went out and 292 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 2022-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 403 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 2022-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
403 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
1598 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 15, 8:45 AM CDTSevere Thunderstorm WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Washington7 hr
May 15, 11:18 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 13 more87 min
May 15, 12:38 PM CDTSevere Thunderstorm WatchSPCArkansas, Baxter, Boone, Cleburne, Conway, Faulkner and 28 more5 hr
May 15, 12:46 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Conway, Crawford and 13 more89 min
May 15, 2:41 PM CDTMesoscale DiscussionSPCClark, Cleveland, Conway, Crawford, Dallas, Faulkner and 17 more94 min
May 15, 2:58 PM CDTSevere Thunderstorm WatchSPCBradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 16 more6 hr
May 15, 3:23 PM CDTSevere Thunderstorm WatchSPCCrawford, Franklin, Sebastian, Washington7 hr
May 15, 3:40 PM CDTSevere Thunderstorm WatchSPCClay, Craighead, Crittenden, Cross, Greene, Lee and 4 more5 hr
May 15, 5:09 PM CDTMesoscale DiscussionSPCAshley, Chicot66 min
May 15, 5:22 PM CDTSevere Thunderstorm WatchSPCAshley, Chicot5 hr
May 15, 6:23 PM CDTMesoscale DiscussionSPCAlcorn, Chickasaw, Itawamba, Lee, Pontotoc, Prentiss and 3 more67 min
May 15, 6:26 AM CDTMesoscale DiscussionSPCBates, Buchanan, Cass, Clay, Clinton, Henry and 5 more94 min
May 15, 6:50 AM CDTSevere Thunderstorm WatchSPCBates, Buchanan, Carroll, Cass, Clay, Clinton and 9 more9 hr
May 15, 8:30 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Camden, Cass and 36 more90 min
May 15, 2:03 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Jefferson, Madison, Mississippi, Perry and 5 more117 min
May 15, 2:22 PM CDTSevere Thunderstorm WatchSPCBollinger, Butler, Cape Girardeau, Carter, Madison, Mississippi and 8 more5 hr

Nearby

Mesoscale Discussions in Arkansas, 2022Mesoscale Discussions in Tennessee, 2022Mesoscale Discussions in Mississippi, 2022Every mesoscale discussion in 2022

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.