Alert archive / Missouri / Mesoscale Discussions in 2012
Mesoscale Discussion 609
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2012, 7:00 PM CDT for 7 counties in Kansas; 12 counties in Missouri. It was in force for 30 min.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2012, 7:00 PM CDT (00:00 UTC)
- Expired
- Apr 27, 2012, 7:30 PM CDT
- In force
- 30 min
- Issued by
- the Storm Prediction Center
Counties Atchison County, KS, Brown County, KS, Doniphan County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Wyandotte County, KS, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Cass County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Platte County, MO, Ray County, MO
The radar
The Pleasant Hill radar (KEAX), 44 km from the middle of the area, began a volume at 00:03 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, 0.0 hours before the alert went out and 261 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
- 752 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 558 m²/s²
- 0-3 km storm-relative helicity
- 691 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
336
ACUS11 KWNS 280001
SWOMCD
SPC MCD 280000
MOZ000-KSZ000-NEZ000-280030-
MESOSCALE DISCUSSION 0609
NWS STORM PREDICTION CENTER NORMAN OK
0700 PM CDT FRI APR 27 2012
AREAS AFFECTED...NERN KS INTO NWRN MO
CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON
VALID 280000Z - 280030Z
ONGOING HAIL STORMS EXPECTED TO IMPACT NERN KS INTO NWRN MO.
..JEWELL.. 04/28/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...EAX...OAX...TOP...
LAT...LON 38619432 38989533 39729586 40039535 40149457 39689363
38969335 38679341 38589373 38619432SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 7:18 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Doniphan, Johnson, Leavenworth, Miami, Wyandotte | 95 min |
| Apr 28, 1:17 PM CDT | Mesoscale Discussion | SPC | Franklin, Gasconade, Jefferson, Lincoln, Montgomery, Osage and 7 more | 88 min |
| Apr 28, 1:48 PM CDT | Severe Thunderstorm Watch | SPC | Crawford, Franklin, Gasconade, Jefferson, Lincoln, Montgomery and 6 more | 7 hr |
| Apr 28, 2:56 PM CDT | Mesoscale Discussion | SPC | Saint Charles, Saint Louis, City of Saint Louis | 64 min |
| Apr 28, 5:15 PM CDT | Tornado Watch | SPC | Jefferson, Perry, Sainte Genevieve, Saint Francois, Washington | 5 hr |
| Apr 28, 5:59 PM CDT | Mesoscale Discussion | SPC | Franklin, Gasconade, Jefferson, Lincoln, Montgomery, Pike and 4 more | 2 hr |
| Apr 28, 6:12 PM CDT | Mesoscale Discussion | SPC | Jefferson | 2 hr |
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.