Alert archive / Tennessee / Mesoscale Discussions in 2019
Mesoscale Discussion 504
The Storm Prediction Center issued this mesoscale discussion at May 2, 2019, 4:36 PM CDT for 4 states. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- May 2, 2019, 4:36 PM CDT (21:36 UTC)
- Expired
- May 2, 2019, 5:30 PM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
Counties Clay County, AR, Mississippi County, AR, Ballard County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, McCracken County, KY, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Stoddard County, MO, Crockett County, TN, Dyer County, TN, Gibson County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 97 km from the middle of the area, began a volume at 21:37 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
Little Rock, AR (KBYH), launched 12:00Z, 9.6 hours before the alert went out and 154 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.
- Mixed-layer CAPE
- 18 J/kg
- Mixed-layer CIN
- -199 J/kg
- Mixed-layer LCL
- 888 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 8:11 PM CDT | Mesoscale Discussion | SPC | Clark, Columbia, Hempstead, Howard, Lafayette, Little River and 8 more | 2 hr |
| May 1, 9:40 PM CDT | Severe Thunderstorm Watch | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more | 7 hr |
| May 1, 11:37 PM CDT | Mesoscale Discussion | SPC | Clark, Columbia, Garland, Hempstead, Hot Spring, Howard and 11 more | 113 min |
| May 2, 1:47 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Cross, Faulkner, Greene, Independence and 8 more | 118 min |
| May 2, 2:13 PM CDT | Tornado Watch | SPC | Clay, Cleburne, Craighead, Cross, Greene, Independence and 8 more | 5 hr |
| May 2, 4:49 PM CDT | Tornado Watch | SPC | Mississippi | 5 hr |
| May 2, 6:37 PM CDT | Mesoscale Discussion | SPC | Mississippi | 83 min |
| May 2, 12:22 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Boone and 73 more | 113 min |
Nearby
Mesoscale Discussions in Tennessee, 2019Mesoscale Discussions in Kentucky, 2019Mesoscale Discussions in Missouri, 2019Every mesoscale discussion in 2019
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.