Alert archive / Missouri / Mesoscale Discussions in 2012
Mesoscale Discussion 739
The Storm Prediction Center issued this mesoscale discussion at May 6, 2012, 7:24 PM CDT for 10 counties in Kansas; 32 counties in Missouri. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- May 6, 2012, 7:24 PM CDT (00:24 UTC)
- Expired
- May 6, 2012, 9:00 PM CDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 42 counties
Allen County, KS, Anderson County, KS, Bourbon County, KS, Coffey County, KS, Franklin County, KS, Johnson County, KS, Linn County, KS, Miami County, KS, Woodson County, KS, Wyandotte County, KS, Bates County, MO, Benton County, MO, Boone County, MO, Caldwell County, MO, Camden County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Chariton County, MO, Clay County, MO, Cole County, MO, Cooper County, MO, Dallas County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Pettis County, MO, Polk County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, St. Clair County, MO, Vernon County, MO
The radar
The Pleasant Hill radar (KEAX), 69 km from the middle of the area, began a volume at 00:25 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
Topeka, KS (KTOP), launched 00:00Z, 0.4 hours before the alert went out and 189 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
- 2839 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 698 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.0
The text
As transmitted, in the capitals the NWS used until 2016.
264
ACUS11 KWNS 070024
SWOMCD
SPC MCD 070024
MOZ000-KSZ000-070200-
MESOSCALE DISCUSSION 0739
NWS STORM PREDICTION CENTER NORMAN OK
0724 PM CDT SUN MAY 06 2012
AREAS AFFECTED...E-CNTRL KS...W-CNTRL MO
CONCERNING...SEVERE THUNDERSTORM WATCH 258...259...
VALID 070024Z - 070200Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
258...259...CONTINUES.
SUMMARY...SPORADIC SEVERE THREAT SHOULD LARGELY EXIST WITH
SLOW-MOVING TSTM CLUSTERS ACROSS E-CNTRL KS INTO W-CNTRL MO.
DISCUSSION...CONVECTIVE COVERAGE HAS GRADUALLY INCREASED WITHIN A
TSTM COMPLEX INVOF KANSAS CITY METRO AREA...FED BY THE NRN FRINGE OF
LOWER 70S SURFACE DEW POINTS AND A STRONGLY UNSTABLE AIR MASS /PER
MODIFIED 00Z TOP RAOB/. HOWEVER...WITH DEEP-LAYER SHEAR REMAINING
MODEST /AROUND 20 KT PER EAX VWP DATA/ AND ONLY WEAK LOW-LEVEL MASS
RESPONSE EXPECTED THIS EVENING...ANY SEWD PROPAGATION WOULD BE
DEPENDENT ON HAVING SUFFICIENT COLD POOL DEVELOPMENT.
HOWEVER...EARLIER CONVECTION OVER BOTH SWRN AND NERN MO HAS
STABILIZED THESE REGIONS TO SOME EXTENT /PER 00Z SGF RAOB/ AND
BREEDS UNCERTAINTY OVER THE LONGEVITY OF THE RISK FOR ISOLATED
SEVERE HAIL/DAMAGING WINDS LATER THIS EVENING.
..GRAMS.. 05/07/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LSX...SGF...EAX...TOP...ICT...
LAT...LON 39479446 39979355 39989246 39689221 39209213 38619211
38009231 37669268 37579347 37819571 38299607 39479446SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 9:55 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Chautauqua, Cherokee, Cowley and 9 more | 65 min |
Nearby
Mesoscale Discussions in Missouri, 2012Mesoscale Discussions in Kansas, 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.