Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 929
The Storm Prediction Center issued this mesoscale discussion at May 24, 2011, 1:35 PM CDT for 30 counties in Missouri. It was in force for 25 min.
The area
The outline as issued.
The facts
- Issued
- May 24, 2011, 1:35 PM CDT (18:35 UTC)
- Expired
- May 24, 2011, 2:00 PM CDT
- In force
- 25 min
- Issued by
- the Storm Prediction Center
All 30 counties
Audrain County, MO, Boone County, MO, Caldwell County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Livingston County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Warren County, MO
The radar
The Pleasant Hill radar (KEAX), 143 km from the middle of the area, began a volume at 18:35 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 12:00Z, 6.6 hours before the alert went out and 234 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
- 90 J/kg
- Mixed-layer CIN
- -343 J/kg
- Mixed-layer LCL
- 1363 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
422
ACUS11 KWNS 241835
SWOMCD
SPC MCD 241835
MOZ000-KSZ000-241900-
MESOSCALE DISCUSSION 0929
NWS STORM PREDICTION CENTER NORMAN OK
0135 PM CDT TUE MAY 24 2011
AREAS AFFECTED...NRN AND CNTRL MO
CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON
VALID 241835Z - 241900Z
A WIND DAMAGE AND HAIL THREAT WILL LIKELY EXIST ACROSS NRN AND CNTRL
MO AS AN MCS MOVES SEWD ACROSS THE REGION. WW ISSUANCE IS CURRENTLY
BEING COORDINATED.
A BOWING LINE-SEGMENT IN NW MO IS LOCATED ALONG AN AXIS OF MODERATE
INSTABILITY WHERE MESOANALYSIS SHOWS MLCAPE VALUES IN THE 1000 TO
1500 J/KG RANGE. MODERATE INSTABILITY EXTENDS SWD ACROSS WRN MO
WHERE THE NOSE OF A 35 TO 45 KT LOW-LEVEL JET IS LOCATED. AS THE
LOW-LEVEL JET STRENGTHENS AND MORE DESTABILIZATION OCCURS...THE MCS
SHOULD RIDE SEWD ALONG AN INSTABILITY GRADIENT INTO CNTRL AND ERN MO
WITH A CONTINUED THREAT FOR WIND DAMAGE. AN ENHANCED WIND DAMAGE
THREAT COULD ALSO DEVELOP ESPECIALLY IF THE BOWING-LINE SEGMENT CAN
ACCELERATE IN FORWARD SPEED LATER THIS AFTERNOON. HAIL WILL ALSO BE
POSSIBLE WITH THE MORE INTENSE CELLS EMBEDDED IN THE LINE.
..BROYLES.. 05/24/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LSX...SGF...EAX...
LAT...LON 38459083 39229153 40019359 39859463 39099473 38709389
38319288 37839198 37909122 38459083SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 9:18 AM CDT | Mesoscale Discussion | SPC | Bates, Cass, Jackson, Vernon | 87 min |
| May 24, 1:38 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Boone, Callaway, Carroll, Chariton, Cole and 27 more | 5 hr |
| May 24, 4:55 PM CDT | Mesoscale Discussion | SPC | Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 16 more | 65 min |
Nearby
Mesoscale Discussions in Missouri, 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.