Alert archive / Arkansas / Mesoscale Discussions in 2018
Mesoscale Discussion 338
The Storm Prediction Center issued this mesoscale discussion at May 3, 2018, 3:45 PM CDT for 31 counties in Arkansas. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- May 3, 2018, 3:45 PM CDT (20:45 UTC)
- Expired
- May 3, 2018, 4:45 PM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 31 counties
Arkansas County, AR, Clark County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Craighead County, AR, Cross County, AR, Dallas County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hot Spring County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lonoke County, AR, Monroe County, AR, Pike County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, White County, AR, Woodruff County, AR
The radar
The Little Rock radar (KLZK), 16 km from the middle of the area, began a volume at 20:45 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, 8.8 hours before the alert went out and 196 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1346 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 2, 10:20 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Crawford, Franklin and 6 more | 115 min |
| May 2, 11:09 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Crawford, Franklin and 12 more | 7 hr |
| May 3, 2:32 AM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Franklin, Fulton, Izard and 6 more | 88 min |
| May 3, 9:02 AM CDT | Mesoscale Discussion | SPC | Crawford, Franklin, Sebastian, Washington | 88 min |
| May 3, 12:35 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Clark, Conway, Crawford, Franklin and 22 more | 85 min |
| May 3, 1:44 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Clark, Clay, Cleburne, Conway, Craighead and 34 more | 4 hr |
| May 3, 4:52 PM CDT | Mesoscale Discussion | SPC | Baxter, Clark, Clay, Cleburne, Cleveland, Conway and 31 more | 53 min |
Nearby
Mesoscale 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.