Alert archive / Alabama / Mesoscale Discussions in 2018
Mesoscale Discussion 63
The Storm Prediction Center issued this mesoscale discussion at Feb 10, 2018, 8:29 PM CST for 26 counties in Alabama; 6 counties in Florida; 8 counties in Mississippi. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 10, 2018, 8:29 PM CST (02:29 UTC)
- Expired
- Feb 10, 2018, 11:00 PM CST
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 40 counties
Autauga County, AL, Baldwin County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Geneva County, AL, Hale County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Holmes County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Clarke County, MS, George County, MS, Greene County, MS, Harrison County, MS, Jackson County, MS, Perry County, MS, Stone County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 105 km from the middle of the area, began a volume at 02:31 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
Birmingham, AL (KBMX), launched 00:00Z, 2.5 hours before the alert went out and 232 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
- 85 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 683 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 288 m²/s²
- 0-3 km storm-relative helicity
- 296 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 |
|---|---|---|---|---|
| Feb 11, 3:16 AM CST | Mesoscale Discussion | SPC | Henry, Houston | 89 min |
| Feb 11, 5:43 AM CST | Mesoscale Discussion | SPC | Harrison, Jackson | 3 hr |
Nearby
Mesoscale Discussions in Alabama, 2018Mesoscale Discussions in Mississippi, 2018Mesoscale Discussions in Florida, 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.