Alert archive / Mississippi / Mesoscale Discussions in 2013
Mesoscale Discussion 310
The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2013, 6:49 PM CDT for 4 counties in Alabama; 21 counties in Mississippi. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Mar 23, 2013, 6:49 PM CDT (23:49 UTC)
- Expired
- Mar 23, 2013, 8:45 PM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 25 counties
Greene County, AL, Lamar County, AL, Pickens County, AL, Sumter County, AL, Attala County, MS, Carroll County, MS, Choctaw County, MS, Clay County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Kemper County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha County, MS, Sharkey County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 101 km from the middle of the area, began a volume at 23:52 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
Jackson, MS (KJAN), launched 12:00Z, 11.8 hours before the alert went out and 104 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
- -308 J/kg
- Mixed-layer LCL
- 445 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 250 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
818
ACUS11 KWNS 232350
SWOMCD
SPC MCD 232349
ALZ000-MSZ000-LAZ000-ARZ000-240145-
MESOSCALE DISCUSSION 0310
NWS STORM PREDICTION CENTER NORMAN OK
0649 PM CDT SAT MAR 23 2013
AREAS AFFECTED...N CNTRL MS INTO W CNTRL AL
CONCERNING...SEVERE THUNDERSTORM WATCH 60...
VALID 232349Z - 240145Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 60
CONTINUES.
SUMMARY...SEVERE STORMS WITH DAMAGING WINDS AND HAIL WILL CONTINUE
TO MOVE ENEWD ACROSS THE REGION AND MAY PERSIST INTO AL.
DISCUSSION...RADAR SHOWS TWO STRONG BOWING STORMS ACROSS NWRN MS AND
NEAR THE ARKLAMISS. THESE STORMS HAVE BEEN SHOWING SIGNS UP
INTENSIFICATION WITH AN INCREASE IN SIZE AS WELL AS LIGHTNING.
SURFACE ANALYSIS ALSO SHOWS PRESSURE FALLS ARE MAXIMIZED IN THIS
REGION...AND OTHER ECHOES WERE FORMING JUST AHEAD OF THESE TWO BOWS.
GIVEN VERY STRONG DEEP LAYER SHEAR...A CONTINUED FORWARD PROPAGATION
OF THESE SYSTEMS...ESPECIALLY THE SRN ONE...IS LIKELY. FURTHER
INTENSIFICATION MAY OCCUR AS THE LOW LEVEL JET INCREASES LATER THIS
EVENING IN RESPONSE TO THE UPPER TROUGH.
..JEWELL.. 03/23/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BMX...MEG...JAN...
LAT...LON 32388835 32589043 32669121 32869119 33349126 33759010
33828806 33448769 32988770 32628788 32388835SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 23, 3:41 AM CDT | Mesoscale Discussion | SPC | Blount, Colbert, Cullman, Fayette, Franklin, Jefferson and 12 more | 64 min |
| Mar 23, 7:38 AM CDT | Mesoscale Discussion | SPC | Baldwin, Covington, Escambia, Geneva, Mobile | 97 min |
| Mar 23, 12:35 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 8 more | 85 min |
| Mar 23, 12:56 PM CDT | Severe Thunderstorm Watch | SPC | Baldwin, Barbour, Bullock, Butler, Choctaw, Clarke and 19 more | 9 hr |
| Mar 23, 2:52 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 13 more | 83 min |
| Mar 23, 5:22 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 13 more | 53 min |
| Mar 23, 6:24 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Butler, Chilton, Choctaw and 24 more | 66 min |
| Mar 23, 6:42 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more | 7 hr |
| Mar 22, 8:16 PM CDT | Mesoscale Discussion | SPC | Attala, Bolivar, Carroll, Choctaw, Claiborne, Copiah and 18 more | 119 min |
| Mar 23, 5:01 PM CDT | Mesoscale Discussion | SPC | Adams, Attala, Carroll, Choctaw, Claiborne, Copiah and 28 more | 119 min |
| Mar 23, 5:21 PM CDT | Tornado Watch | SPC | Adams, Amite, Claiborne, Clarke, Copiah, Covington and 25 more | 6 hr |
| Mar 23, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | Attala, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw and 29 more | 5 hr |
Nearby
Mesoscale Discussions in Mississippi, 2013Mesoscale Discussions in Alabama, 2013Every mesoscale discussion in 2013
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.