Alert archive / Missouri / Mesoscale Discussions in 2010
Mesoscale Discussion 521
The Storm Prediction Center issued this mesoscale discussion at May 11, 2010, 8:40 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 11, 2010, 8:40 PM CDT (01:40 UTC)
- Expired
- May 11, 2010, 10:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 42 counties
Benton County, AR, Allen County, KS, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Barry County, MO, Barton County, MO, Camden County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Hickory County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, McDonald County, MO, Miller County, MO, Newton County, MO, Polk County, MO, Pulaski County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Webster County, MO, Wright County, MO, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Rogers County, OK, Washington County, OK
The radar
The Springfield radar (KSGF), 95 km from the middle of the area, began a volume at 01:39 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, 1.7 hours before the alert went out and 73 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
- 2432 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1003 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 10.5
The text
As transmitted, in the capitals the NWS used until 2016.
707 ACUS11 KWNS 120141 SWOMCD SPC MCD 120140 MOZ000-ARZ000-OKZ000-KSZ000-120345- MESOSCALE DISCUSSION 0521 NWS STORM PREDICTION CENTER NORMAN OK 0840 PM CDT TUE MAY 11 2010 AREAS AFFECTED...NERN OK...SERN KS...SWRN MO CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 120140Z - 120345Z FRONTAL ZONE HAS BECOME STATIONARY OVER SRN MO AND IS GRADUALLY RETREATING NWD INTO SERN KS AS LOW LEVEL WARM ADVECTION INTENSIFIES ACROSS THE REGION. SHORT RANGE MODEL GUIDANCE SUGGEST LOWER TROPOSPHERIC PROFILES WILL GRADUALLY MOISTEN IN THE LOWEST 700 MB ACROSS THIS REGION...ULTIMATELY LEADING TO A RATHER DEEP ENVIRONMENT WHERE PARCELS WILL BE UNINHIBITED FOR POTENTIAL CONVECTION. LATEST RADAR DATA SUGGEST SCATTERED SHOWERS...AND EVEN A FEW THUNDERSTORMS...ARE DEVELOPING WITHIN THIS MOISTENING ENVIRONMENT FROM NEAR FSM...NWD INTO SERN KS. OVER TIME...CURRENT THINKING IS...SCATTERED THUNDERSTORMS WILL DEVELOP AND BECOME MORE FOCUSED ALONG AFOREMENTIONED FRONTAL ZONE. GIVEN THE STRONG SHEAR IT/S LIKELY THAT UPDRAFTS WILL ROTATE. HAIL IS LIKELY THE GREATEST CONCERN WITH THIS ACTIVITY THAT DEVELOPS BENEATH ERN BRANCH OF VEERED LLJ. ..DARROW.. 05/12/2010 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SGF...EAX...TSA...TOP...ICT... LAT...LON 37999579 38259228 36949199 36249431 36349664 37999579
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 7:54 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche, Harper, Kingman, Pratt, Sumner | 66 min |
| May 11, 8:11 PM CDT | Tornado Watch | SPC | Barber, Barton, Butler, Chase, Comanche, Cowley and 17 more | 8 hr |
| May 11, 11:05 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Butler, Chase, Chautauqua, Clark and 32 more | 25 min |
| May 11, 11:16 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Barber, Barton, Bourbon, Butler and 54 more | 6 hr |
| May 12, 2:34 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Barber, Barton, Bourbon, Butler and 60 more | 56 min |
| May 12, 2:21 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Barber, Butler, Chase, Coffey and 21 more | 54 min |
| May 12, 2:41 PM CDT | Tornado Watch | SPC | Anderson, Butler, Chase, Coffey, Cowley, Dickinson and 20 more | 7 hr |
| May 12, 5:14 PM CDT | Mesoscale Discussion | SPC | Anderson, Bourbon, Franklin, Johnson, Leavenworth, Linn and 2 more | 91 min |
| May 12, 5:40 PM CDT | Tornado Watch | SPC | Johnson, Leavenworth, Miami, Wyandotte | 6 hr |
| May 12, 6:59 PM CDT | Mesoscale Discussion | SPC | Barber, Butler, Chase, Coffey, Cowley, Dickinson and 13 more | 61 min |
| May 12, 4:51 AM CDT | Mesoscale Discussion | SPC | Benton, Cole, Franklin, Gasconade, Henry, Jefferson and 9 more | 54 min |
Nearby
Mesoscale Discussions in Missouri, 2010Mesoscale Discussions in Kansas, 2010Mesoscale Discussions in Oklahoma, 2010Every mesoscale discussion in 2010
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.