Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 152
The Storm Prediction Center issued this mesoscale discussion at Feb 27, 2011, 5:10 PM CST for Adams County, Pike County, Illinois; 9 counties in Missouri. It was in force for 35 min.
The area
The outline as issued.
The facts
- Issued
- Feb 27, 2011, 5:10 PM CST (23:10 UTC)
- Expired
- Feb 27, 2011, 5:45 PM CST
- In force
- 35 min
- Issued by
- the Storm Prediction Center
Counties Adams County, IL, Pike County, IL, Audrain County, MO, Boone County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Shelby County, MO
The radar
The St Louis radar (KLSX), 129 km from the middle of the area, began a volume at 23:13 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
Davenport, (KDVN), launched 12:00Z, 11.2 hours before the alert went out and 254 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
- 680 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
016
ACUS11 KWNS 272311
SWOMCD
SPC MCD 272310
ILZ000-MOZ000-272345-
MESOSCALE DISCUSSION 0152
NWS STORM PREDICTION CENTER NORMAN OK
0510 PM CST SUN FEB 27 2011
AREAS AFFECTED...NE MO AND WCNTRL IL
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 272310Z - 272345Z
MCV CONTINUES TO MIGRATE ENE ALONG SRN EDGE OF THE SNOWPACK/WARM
FRONT IN NCNTRL MO. ASSOCIATED STORMS CONTINUE TO PRODUCE LARGE
HAIL. OBJECTIVE ANALYSIS PLACES AN AXIS OF MUCAPE ENE INTO WCNTRL
IL AND EXPECT STORMS MAY PULSE TO SVR LEVELS AS THEY TREK INTO
WCNTRL IL BY EARLY THIS EVENING. AS SUCH...A NEW SEVERE
THUNDERSTORM WATCH WILL BE LIKELY.
..RACY.. 02/27/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LSX...EAX...
LAT...LON 39979259 40099145 39939088 39489072 39149106 38889190
38819259 39979259SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 27, 4:57 PM CST | Mesoscale Discussion | SPC | Alexander, Franklin, Hardin, Jackson, Jefferson, Johnson and 11 more | 2 hr |
| Feb 27, 5:33 PM CST | Severe Thunderstorm Watch | SPC | Adams, Brown, Cass, DeWitt, Fulton, Logan and 12 more | 4 hr |
| Feb 27, 5:50 PM CST | Mesoscale Discussion | SPC | Bureau, Carroll, DeKalb, Henry, Lee, Mercer and 3 more | 6 hr |
| Feb 27, 12:44 PM CST | Mesoscale Discussion | SPC | Pemiscot | 91 min |
| Feb 27, 12:46 PM CST | Mesoscale Discussion | SPC | Caldwell, Carroll, Cass, Chariton, Clay, Clinton and 7 more | 59 min |
| Feb 27, 1:12 PM CST | Severe Thunderstorm Watch | SPC | Bates, Caldwell, Carroll, Cass, Chariton, Clay and 15 more | 9 hr |
| Feb 27, 2:12 PM CST | Mesoscale Discussion | SPC | Barton, Dade, Jasper, Lawrence, Newton | 93 min |
| Feb 27, 3:24 PM CST | Mesoscale Discussion | SPC | Bates, Carroll, Cass, Chariton, Clay, Cooper and 10 more | 66 min |
Nearby
Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Illinois, 2011Every mesoscale discussion in 2011
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.