Alert archive / Missouri / Mesoscale Discussions in 2003
Mesoscale Discussion 508
The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2003, 8:29 PM CDT for 12 counties in Kansas; 21 counties in Missouri. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2003, 8:29 PM CDT (01:29 UTC)
- Expired
- Apr 19, 2003, 10:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 33 counties
Allen County, KS, Anderson County, KS, Bourbon County, KS, Coffey County, KS, Crawford County, KS, Douglas County, KS, Franklin County, KS, Johnson County, KS, Linn County, KS, Miami County, KS, Osage County, KS, Woodson County, KS, Barton County, MO, Bates County, MO, Benton County, MO, Camden County, MO, Cass County, MO, Cedar County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Henry County, MO, Hickory County, MO, Jackson County, MO, Jasper County, MO, Johnson County, MO, Lafayette County, MO, Morgan County, MO, Pettis County, MO, Polk County, MO, Saline County, MO, St. Clair County, MO, Vernon County, MO
The radar
The Pleasant Hill radar (KEAX), 103 km from the middle of the area, began a volume at 01:30 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
Springfield, MO (KSGF), launched 00:00Z, 1.5 hours before the alert went out and 134 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
- 11 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 902 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 286 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
032 ACUS11 KWNS 200130 SWOMCD SPC MCD 200129 MOZ000-KSZ000-200330- MESOSCALE DISCUSSION 0508 NWS STORM PREDICTION CENTER NORMAN OK 0829 PM CDT SAT APR 19 2003 AREAS AFFECTED...ERN KS/WRN MO CONCERNING...SEVERE THUNDERSTORM WATCH 133...134... VALID 200129Z - 200330Z LATEST MESOANALYSIS SHOWS PACIFIC COLD FRONT EXTENDING SOUTH OF MCI TO NORTH OF JLN...WITH INSTABILITY AXIS INTO SOUTHEAST KS. IT APPEARS THE MAIN TORNADIC THREAT WILL BE ACROSS SOUTHEAST KS/SOUTHWEST MO...WHERE 0-3KM STORM RELATIVE HELICITY VALUES EXCEED 300 M2/S2. LATEST RADAR TRENDS SHOW SUPERCELLS IN SE KS...WHICH WILL TRACK INTO SW MO BY 20/0200Z WITH AN INCREASING THREAT OF DAMAGING WINDS AS ACTIVITY MOVES INTO LESS UNSTABLE AIR. MEANWHILE...SEVERE THREAT IS DECREASING ACROSS THE WRN PORTIONS OF WW 133...WHERE STRATIFORM RAIN AREA HAS STABILIZED THE ENVIRONMENT. THE MAIN THREAT IN THE ERN PORTION OF THE WW WILL BE FROM LARGE HAIL WITH A CONTINUED WIND THREAT UNTIL THE MID LEVEL SPEED MAX MOVES AWAY FROM THE AREA. ..TAYLOR.. 04/20/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...LSX...SGF...EAX...TOP...ICT... 37069478 37719512 37919610 38889601 39399283 37439264
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 7:54 PM CDT | Mesoscale Discussion | SPC | Labette, Montgomery | 96 min |
| Apr 19, 8:55 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Lawrence, McDonald, Newton | 5 hr |
| Apr 19, 10:35 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Callaway, Camden, Christian, Cole, Cooper and 20 more | 5 hr |
| Apr 19, 10:42 PM CDT | Mesoscale Discussion | SPC | Barry, McDonald, Newton | 93 min |
| Apr 20, 1:25 AM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 29 more | 2 hr |
| Apr 20, 1:50 AM CDT | Severe Thunderstorm Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Franklin, Iron and 14 more | 5 hr |
| Apr 20, 4:00 AM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Iron, Jefferson, Madison and 8 more | 2 hr |
| Apr 20, 11:52 AM CDT | Mesoscale Discussion | SPC | Dunklin, Mississippi, New Madrid, Pemiscot, Scott | 2 hr |
| Apr 20, 1:00 PM CDT | Mesoscale Discussion | SPC | Mississippi, New Madrid, Pemiscot | 3 hr |
Nearby
Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Kansas, 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; radar from the NEXRAD Level II archive.