Alert archive / Missouri / Mesoscale Discussions in 2007
Mesoscale Discussion 721
The Storm Prediction Center issued this mesoscale discussion at May 6, 2007, 7:10 AM CDT for 9 counties in Iowa; 4 counties in Kansas; 14 counties in Missouri. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- May 6, 2007, 7:10 AM CDT (12:10 UTC)
- Expired
- May 6, 2007, 8:45 AM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 27 counties
Appanoose County, IA, Davis County, IA, Grundy County, IA, Mahaska County, IA, Marshall County, IA, Monroe County, IA, Poweshiek County, IA, Tama County, IA, Wapello County, IA, Coffey County, KS, Franklin County, KS, Johnson County, KS, Wyandotte County, KS, Adair County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clay County, MO, Grundy County, MO, Jackson County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Putnam County, MO, Ray County, MO, Schuyler County, MO, Sullivan County, MO
The radar
The Des Moines radar (KDMX), 156 km from the middle of the area, began a volume at 12:13 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 nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 0.2 hours before the alert went out and 260 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
- 1426 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 061210 SWOMCD SPC MCD 061210 IAZ000-MOZ000-KSZ000-061345- MESOSCALE DISCUSSION 0721 NWS STORM PREDICTION CENTER NORMAN OK 0710 AM CDT SUN MAY 06 2007 AREAS AFFECTED...ERN KS...IA...MO CONCERNING...SEVERE THUNDERSTORM WATCH 242... VALID 061210Z - 061345Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 242 CONTINUES. PRONOUNCED MCC IR CLOUD PATTERN CENTERED OVER IA EARLY THIS MORNING WITH AN EXTENSIVE CANOPY OF CLOUD-TOP TEMPERATURES LESS THAN MINUS 80C FROM NERN KS ACROSS NWRN MO AND MUCH OF WCNTRL IA. WHILE RADAR REFLECTIVITY ON THE LEADING EDGE OF THE NRN PORTION OF THE BOW ECHO...ACROSS CNTRL IA...HAS BEGUN TO SHOW SIGNS OF WEAKENING... EXPANSIVE STRATIFORM RAIN REGION AND MESOSCALE PRESSURE PERTURBATIONS HAVE RESULTED IN A CORRIDOR OF INTENSE SURFACE WINDS IN THE NRN QUADRANT OF THE CONVECTIVE COMPLEX. WIND GUSTS IN THIS REGION HAVE EXCEEDED 60KT. INTENSE BUT SLOWER MOVING CONVECTION...IN LINE SEGMENTS AND CLUSTERS...EXTENDED SWD AND SWWD FROM NRN MO INTO ERN KS. HERE TOO...SURFACE PRESSURE PERTURBATIONS AS A RESULT OF THE DEEP CONVECTION HAVE ESTABLISHED A WELL-DEFINED INVERTED TROUGH AXIS FROM NCNTRL MO TO SERN KS. STRONG LLJ DIRECTED INTO/ACROSS THIS AXIS...AND INFLUX OF VERY MOIST AND UNSTABLE AIR MASS...WILL CONTINUE TO FUEL STRONG AND OCCASIONALLY SEVERE STORMS ACROSS BOTH ERN KS AND NRN MO THIS MORNING. IN ADDITION TO SCATTERED HAIL AND LOCALLY STRONG WIND GUSTS...VERY HEAVY RAINFALL WILL CONTINUE TO CAUSE FLOODING PROBLEMS. ..CARBIN.. 05/06/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...LSX...DVN...DMX...EAX...TOP... 39699228 39089380 38119583 38409598 39449453 40139366 41049309 41859302 42219339 42469280 41859220
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 7:22 PM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 21 more | 9 hr |
| May 5, 7:26 PM CDT | Mesoscale Discussion | SPC | Lyon, Plymouth, Sioux, Woodbury | 94 min |
| May 5, 9:16 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 21 more | 59 min |
| May 5, 9:31 PM CDT | Tornado Watch | SPC | Cherokee, Fremont, Harrison, Ida, Lyon, Mills and 10 more | 6 hr |
| May 6, 1:50 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 37 more | 85 min |
| May 6, 4:08 AM CDT | Mesoscale Discussion | SPC | Appanoose, Clarke, Davis, Decatur, Lucas, Madison and 7 more | 2 hr |
| May 6, 4:40 AM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Clarke, Dallas, Davis, Decatur, Jasper and 10 more | 4 hr |
| May 5, 8:18 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Butler, Chase, Coffey and 18 more | 57 min |
| May 5, 9:08 PM CDT | Tornado Watch | SPC | Anderson, Barber, Barton, Brown, Butler, Chase and 64 more | 7 hr |
| May 5, 11:24 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Cloud, Comanche, Edwards and 23 more | 66 min |
| May 6, 9:19 AM CDT | Tornado Watch | SPC | Allen, Bourbon, Chautauqua, Cherokee, Cowley, Crawford and 8 more | 5 hr |
| May 6, 11:41 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Barber, Barton, Bourbon, Butler and 36 more | 94 min |
| May 6, 1:47 PM CDT | Mesoscale Discussion | SPC | Clark | 58 min |
| May 6, 1:59 PM CDT | Tornado Watch | SPC | Allen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 25 more | 8 hr |
| May 6, 5:38 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 28 more | 67 min |
| May 6, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Chase, Clay, Cloud, Coffey, Dickinson and 18 more | 7 hr |
Nearby
Mesoscale Discussions in Missouri, 2007Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Kansas, 2007Every mesoscale discussion in 2007
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.