Alert archive / Mississippi / Mesoscale Discussions in 2003
Mesoscale Discussion 80
The Storm Prediction Center issued this mesoscale discussion at Feb 15, 2003, 5:51 PM CST for Washington Parish, Louisiana; 33 counties in Mississippi. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Feb 15, 2003, 5:51 PM CST (23:51 UTC)
- Expired
- Feb 15, 2003, 7:45 PM CST
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 34 counties
Washington Parish, LA, Attala County, MS, Carroll County, MS, Choctaw County, MS, Clarke County, MS, Covington County, MS, Forrest County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pearl River County, MS, Perry County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS, Webster County, MS, Winston County, MS
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 11.9 hours before the alert went out and 73 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
- 43 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 593 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 167 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 152352 SWOMCD SPC MCD 152351 MSZ000-LAZ000-160145- MESOSCALE DISCUSSION 0080 NWS STORM PREDICTION CENTER NORMAN OK 0551 PM CST SAT FEB 15 2003 AREAS AFFECTED...PARTS OF SRN AND ERN MS CONCERNING...SEVERE THUNDERSTORM WATCH 7... VALID 152351Z - 160145Z A FEW ROTATING THUNDERSTORMS WITHIN BOWING LINE SEGMENTS MOVING ACROSS ERN PORTIONS OF WW CONTINUE TO PRODUCE WIND DAMAGE. LATEST RADAR IMAGERY CONTINUES TO INDICATE MESOLOW MOVING ENEWD ACROSS E CENTRAL MS ATTM. MARGINAL INSTABILITY BUT FAVORABLE DEEP-LAYER SHEAR PERSISTS...AS DOES STORM ROTATION PER LATEST RADAR DATA. STRONGEST COUPLET ATTM APPEARS TO BE MOVING NEWD OUT OF NRN JONES COUNTY INTO JASPER COUNTY MS. SEVERE THREAT WILL CONTINUE ALONG AND AHEAD OF LINE AS BOWING SEGMENTS MOVE EWD INTO NEWLY-ISSUED WW OVER WRN AL. ..GOSS.. 02/15/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 33638906 33638819 32188848 30738878 30738962 30739046 32189019 33638993
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 15, 1:48 PM CST | Mesoscale Discussion | SPC | East Feliciana, Livingston, Saint Helena, Saint Tammany, Tangipahoa, Washington | 117 min |
| Feb 15, 3:05 PM CST | Tornado Watch | SPC | Washington | 6 hr |
| Feb 15, 5:18 PM CST | Mesoscale Discussion | SPC | Lowndes | 117 min |
Nearby
Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Louisiana, 2003Every mesoscale discussion in 2003
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.