Alert archive / Missouri / Mesoscale Discussions in 2012
Mesoscale Discussion 335
The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2012, 1:58 PM CDT for 18 counties in Illinois; Des Moines County, Lee County, Iowa; 20 counties in Missouri. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 23, 2012, 1:58 PM CDT (18:58 UTC)
- Expired
- Mar 23, 2012, 4:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Des Moines County, IA, Lee County, IA, Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Henderson County, IL, Jersey County, IL, Knox County, IL, Madison County, IL, McDonough County, IL, Mercer County, IL, Morgan County, IL, Pike County, IL, Schuyler County, IL, Scott County, IL, Warren County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, Clark County, MO, Cole County, MO, Gasconade County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Shelby County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 121 km from the middle of the area, began a volume at 18:58 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
Davenport, (KDVN), launched 12:00Z, 7.0 hours before the alert went out and 233 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
- 997 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -46 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
526
ACUS11 KWNS 231859
SWOMCD
SPC MCD 231858
ILZ000-MOZ000-IAZ000-232100-
MESOSCALE DISCUSSION 0335
NWS STORM PREDICTION CENTER NORMAN OK
0158 PM CDT FRI MAR 23 2012
AREAS AFFECTED...CENTRAL/NORTHEAST MO TO WEST-CENTRAL IL/EXTREME
SOUTHEAST IA
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 231858Z - 232100Z
THE POTENTIAL WILL EXIST THIS AFTERNOON FOR FUNNELS AND PERHAPS A
BRIEF TORNADO TOUCHDOWN...IN ADDITION TO MAINLY SUB-SEVERE HAIL
ACROSS PORTIONS OF CENTRAL/NORTHEAST MO TO WEST-CENTRAL IL/PERHAPS
FAR SOUTHEAST IA. A WATCH IS NOT CURRENTLY EXPECTED.
WITH A COLD /-26C AT 500 MB/ AND NEARLY VERTICALLY STACKED CYCLONE
NOW CENTERED OVER THE SOUTHERN HALF OF MO...A ZONE OF LOW-LEVEL
CONFLUENCE IS OBSERVED TO BE ARCING FROM CENTRAL/NORTHEAST MO INTO
WEST-CENTRAL IL ATTENDANT TO A WEAK SURFACE LOW. IN THIS REGION...A
DEEPENING LOW-TOPPED CUMULUS FIELD IS NOTED PER VISIBLE SATELLITE
IMAGERY AS CINH HAS QUICKLY ERODED EARLY THIS AFTERNOON. WHILE THE
BOUNDARY LAYER IS NOT PARTICULARLY MOIST /UPPER 40S TO LOWER 50S F
SURFACE DEWPOINTS/...SUFFICIENT MOISTURE DOES EXIST IN THE PRESENCE
OF STEEP LOW-MID LEVEL LAPSE RATES AND A VORTICITY-RICH ENVIRONMENT
FOR THE POSSIBILITY OF LOW-TOPPED TSTMS WITH FUNNELS/SMALL HAIL AND
POSSIBLY A BRIEF TORNADO TOUCHDOWN.
..GUYER.. 03/23/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILX...LSX...DVN...EAX...
LAT...LON 38619262 39209263 39889237 40609186 40949152 41269083
40948990 39949003 38758989 38659070 38309166 38619262SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 23, 9:46 AM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Crawford, Edwards, Franklin, Gallatin and 20 more | 119 min |
| Mar 23, 11:44 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Champaign, Christian, Clark, Clay and 36 more | 7 hr |
| Mar 23, 1:28 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Coles, Crawford, Cumberland, Edwards and 10 more | 62 min |
| Mar 23, 3:17 PM CDT | Mesoscale Discussion | SPC | Champaign, Clark, Coles, Crawford, Cumberland, Douglas and 9 more | 58 min |
| Mar 23, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | Ford, Iroquois, Kankakee | 4 hr |
| Mar 23, 6:43 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 18 more | 32 min |
Nearby
Mesoscale Discussions in Missouri, 2012Mesoscale Discussions in Illinois, 2012Mesoscale Discussions in Iowa, 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.