Alert archive / Missouri / Mesoscale Discussions in 2005
Mesoscale Discussion 2021
The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2005, 8:00 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2005, 8:00 PM CDT (01:00 UTC)
- Expired
- Aug 18, 2005, 10:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 67 counties
Adams County, IL, Brown County, IL, Cass County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Morgan County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Tazewell County, IL, Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Audrain County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clark County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Howard County, MO, Jackson County, MO, Knox County, MO, Lafayette County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Monroe County, MO, Pike County, MO, Platte County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Richardson County, NE
The radar
The Pleasant Hill radar (KEAX), 134 km from the middle of the area, began a volume at 00:59 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
Topeka, KS (KTOP), launched 00:00Z, 1.0 hours before the alert went out and 199 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
- 3273 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1671 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 14.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 190100 SWOMCD SPC MCD 190100 ILZ000-MOZ000-IAZ000-KSZ000-NEZ000-190300- MESOSCALE DISCUSSION 2021 NWS STORM PREDICTION CENTER NORMAN OK 0800 PM CDT THU AUG 18 2005 AREAS AFFECTED...NERN KS/FAR SERN NEB...NRN MO/FAR SRN IA AND WCENTRAL IL CONCERNING...SEVERE THUNDERSTORM WATCH 732... VALID 190100Z - 190300Z SEVERAL SVR TSTMS WILL CONTINUE TO MOVE EWD POSING THREAT FOR LARGE HAIL AND DMGG WINDS ACROSS MAINLY WRN HALF OF WW 732 FOR THE NEXT FEW HOURS. SOME OF THE SVR STORMS MAY DEVELOP SLIGHTLY NWD OUT OF WW 732 INTO FAR SRN IA...BUT OVERALL NWD EXTENT OF SVR SHOULD BE MITIGATED BY FOCUSED SSWLY INFLOW...THAT ANOTHER WW INTO SRN IA IS NOT ANTICIPATED. ADDITIONAL ISOLATED SVR STORMS MAY DEVELOP WEST OF WW 732 INTO NCENTRAL/CENTRAL KS...BUT SIMILARLY THE SVR THREAT APPEARS LIMITED ENOUGH THAT A WW IS NOT EXPECTED IN THIS AREA EITHER. 00Z TOPEKA AND LINCOLN IL SOUNDINGS INDICATE MODERATE TO VERY UNSTABLE AIRMASS WITH MLCAPES FROM 2500-3500 J/KG. FOCUSED LIFT ALONG SFC FRONTAL BOUNDARY EXTENDING FROM A LOW PRESSURE CENTERED NEAR SLN ENEWD TO WCENTRAL IL SHOULD OFFSET INITIAL NOCTURNAL STABILIZATION AND SUPPORTING SVR THREAT FOR THE NEXT SEVERAL HRS. INCREASING SSWLY LOW LEVEL JET MAY SUPPORT EITHER A BACKBUILDING MCS INTO THE MKC METRO AREA LATER THIS EVENING OR FORWARD PROPAGATING MCS THAT WOULD REACH WCENTRAL IL TOWARDS 05Z. AREA VWP/S SUGGEST THAT LEFT SPLITTING SUPERCELLS WILL BE POSSIBLE. SOME OF THESE LEFT SPLITS MAY MOVE INTO FAR SRN IA...OUT OF WW 732. HOWEVER...LIMITED ENOUGH COVERAGE IS ANTICIPATED SO ANOTHER WW IS NOT EXPECTED. ..CROSBIE.. 08/19/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...ILX...LSX...DVN...DMX...EAX...OAX...TOP... 40079669 38759670 39388943 40688941 40579295
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 9:28 PM CDT | Mesoscale Discussion | SPC | Cook, Lake | 92 min |
| Aug 18, 9:53 PM CDT | Mesoscale Discussion | SPC | Champaign, Christian, Clark, Coles, Cumberland, DeWitt and 18 more | 67 min |
| Aug 18, 10:25 PM CDT | Severe Thunderstorm Watch | SPC | Cass, Champaign, Christian, Clark, Coles, Crawford and 24 more | 8 hr |
| Aug 18, 11:15 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Hancock, McDonough, Pike | 60 min |
| Aug 19, 4:24 AM CDT | Mesoscale Discussion | SPC | Crawford | 66 min |
| Aug 19, 12:49 PM CDT | Mesoscale Discussion | SPC | Crawford, Lawrence, Wabash | 86 min |
| Aug 19, 4:09 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 23 more | 2 hr |
| Aug 19, 10:55 AM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Decatur, Dickinson, Ellis and 23 more | 2 hr |
| Aug 19, 1:50 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 11 more | 115 min |
| Aug 19, 2:52 PM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Dickinson, Edwards, Ellis and 33 more | 53 min |
| Aug 19, 3:20 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Barton, Brown, Chase, Clay, Cloud and 49 more | 7 hr |
| Aug 19, 5:41 PM CDT | Mesoscale Discussion | SPC | Atchison, Barton, Brown, Chase, Clay, Cloud and 39 more | 2 hr |
Nearby
Mesoscale Discussions in Missouri, 2005Mesoscale Discussions in Illinois, 2005Mesoscale Discussions in Kansas, 2005Every mesoscale discussion in 2005
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.