Alert archive / Mississippi / Mesoscale Discussions in 2012
Mesoscale Discussion 90
The Storm Prediction Center issued this mesoscale discussion at Feb 1, 2012, 7:10 PM CST for 15 counties in Alabama; 18 counties in Mississippi; Giles County, Lawrence County, Marshall County, Tennessee. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Feb 1, 2012, 7:10 PM CST (01:10 UTC)
- Expired
- Feb 1, 2012, 8:45 PM CST
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 36 counties
Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Marion County, AL, Morgan County, AL, Pickens County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Attala County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Holmes County, MS, Itawamba County, MS, Kemper County, MS, Lee County, MS, Lowndes County, MS, Monroe County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha County, MS, Pontotoc County, MS, Prentiss County, MS, Tishomingo County, MS, Webster County, MS, Winston County, MS, Giles County, TN, Lawrence County, TN, Marshall County, TN
The radar
The Columbus AFB radar (KGWX), 38 km from the middle of the area, began a volume at 01:13 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 (KLZK), launched 00:00Z, 1.2 hours before the alert went out and 148 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
- 1685 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- -161 m²/s²
- 0-3 km storm-relative helicity
- -137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
983
ACUS11 KWNS 020111
SWOMCD
SPC MCD 020110
ALZ000-TNZ000-MSZ000-020245-
MESOSCALE DISCUSSION 0090
NWS STORM PREDICTION CENTER NORMAN OK
0710 PM CST WED FEB 01 2012
AREAS AFFECTED...PARTS OF NRN MS/NWRN AL/SRN MIDDLE TN
CONCERNING...SEVERE THUNDERSTORM WATCH 22...
VALID 020110Z - 020245Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 22
CONTINUES.
FAIRLY WELL-ORGANIZED/BOWING LINE OF STRONG/LOCALLY SEVERE STORMS
CONTINUES MOVING QUICKLY ESEWD ACROSS NRN MS ATTM...WITH SOME NEW
STORM DEVELOPMENT ONGOING E AND NE OF THE MAIN LINE -- INTO SRN
MIDDLE TN AND NWRN AL.
OBJECTIVE ANALYSES CONTINUE TO INDICATE THAT STORMS ARE MOVING
THROUGH ERN FRINGES OF THE MAIN INSTABILITY AXIS -- WHERE DAYTIME
HEATING WAS MAXIMIZED THIS AFTERNOON. MEANWHILE...A MUCH
COOLER/MORE STABLE AIRMASS REMAINS IN PLACE FARTHER E... ACROSS
MIDDLE TN AND NRN AL.
WITH ELEVATED CAPE SUFFICIENT TO ALLOW A CONTINUATION OF CONVECTION
OVER THE NEXT FEW HOURS...STORMS SHOULD CONTINUE TO MOVE OUT OF NRN
MS AND INTO/ACROSS NRN AL AND SRN MIDDLE TN. HOWEVER...WITH A
PROGRESSIVELY MORE STABLE BOUNDARY LAYER AND STEADILY DECREASING
INSTABILITY WITH EWD EXTENT...SEVERE THREAT SHOULD SLOWLY DIMINISH
-- AND THUS IT APPEARS THAT AN ADDITIONAL WW MAY NOT BE REQUIRED.
..GOSS.. 02/02/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OHX...BMX...HUN...MEG...JAN...
LAT...LON 32799041 33009055 33318963 33878921 34368928 34788815
34928800 35438756 35558671 33898686 32728803 32799041Nearby
Mesoscale Discussions in Mississippi, 2012Mesoscale Discussions in Alabama, 2012Mesoscale Discussions in Tennessee, 2012Every mesoscale discussion in 2012
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.