Alert archive / Mississippi / Mesoscale Discussions in 2007
Mesoscale Discussion 355
The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2007, 4:25 PM CDT for 8 counties in Arkansas; 7 parishes in Louisiana; 18 counties in Mississippi. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2007, 4:25 PM CDT (21:25 UTC)
- Expired
- Mar 27, 2007, 6:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 33 counties
Arkansas County, AR, Ashley County, AR, Chicot County, AR, Desha County, AR, Drew County, AR, Jefferson County, AR, Lincoln County, AR, Phillips County, AR, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Bolivar County, MS, Claiborne County, MS, Coahoma County, MS, Copiah County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Leflore County, MS, Madison County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tunica County, MS, Warren County, MS, Washington County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 132 km from the middle of the area, began a volume at 21:26 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
Jackson, MS (KJAN), launched 12:00Z, 9.4 hours before the alert went out and 123 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
- 755 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 11:58 AM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Clark, Cleveland, Columbia and 9 more | 2 hr |
| Mar 27, 12:35 PM CDT | Tornado Watch | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 15 more | 9 hr |
| Mar 27, 2:48 PM CDT | Mesoscale Discussion | SPC | Bradley, Union | 87 min |
| Mar 27, 5:58 PM CDT | Severe Thunderstorm Watch | SPC | Ashley, Chicot, Desha | 2 hr |
| Mar 27, 6:56 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 28 more | 64 min |
Nearby
Mesoscale Discussions in Mississippi, 2007Mesoscale Discussions in Arkansas, 2007Mesoscale Discussions in Louisiana, 2007Every mesoscale discussion in 2007
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.