Alert archive / Arkansas / Mesoscale Discussions in 2009
Mesoscale Discussion 1012
The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2009, 9:15 PM CDT for 4 states. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2009, 9:15 PM CDT (02:15 UTC)
- Expired
- Jun 9, 2009, 10:15 PM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 33 counties
Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Fulton County, AR, Izard County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Washington County, AR, Cherokee County, KS, Labette County, KS, Barry County, MO, Christian County, MO, Douglas County, MO, Greene County, MO, Howell County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Webster County, MO, Craig County, OK, Delaware County, OK, Mayes County, OK, Ottawa County, OK
The radar
The Springfield radar (KSGF), 65 km from the middle of the area, began a volume at 02:18 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, 2.3 hours before the alert went out and 17 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
- 1799 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 818 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 321 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 16.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 100215 SWOMCD SPC MCD 100215 ARZ000-MOZ000-OKZ000-KSZ000-100315- MESOSCALE DISCUSSION 1012 NWS STORM PREDICTION CENTER NORMAN OK 0915 PM CDT TUE JUN 09 2009 AREAS AFFECTED...SERN KS...SRN MO...NERN OK...NRN AR CONCERNING...TORNADO WATCH 357...358... VALID 100215Z - 100315Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 357...358...CONTINUES. LLJ IS EXPECTED TO VEER AND STRENGTHEN ACROSS NRN AR INTO SRN MO OVER THE NEXT SEVERAL HOURS. THIS INCREASE IN WARM ADVECTION SHOULD ENHANCE THE EWD PROPAGATION OF ONGOING MCS OVER THE KS/OK/MO TRI STATE BORDER REGION. LATEST THINKING IS SEVERE THREAT WILL GRADUALLY INCREASE ALONG THE MO/AR BORDER AND WILL CONTINUE BEYOND THE 03Z EXPIRATION TIME OF ONGOING WATCHES. NEW SEVERE THUNDERSTORM WATCH WILL LIKELY BE NEEDED TO ACCOUNT FOR PRIMARILY DAMAGING WINDS/LARGE HAIL. ..DARROW.. 06/10/2009 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MEG...LZK...SGF...TSA...ICT... LAT...LON 37559561 37349296 36469129 35509186 36069539 37559561
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 7:56 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Craighead, Greene, Lawrence, Mississippi, Randolph | 3 hr |
| Jun 9, 9:46 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Conway, Fulton and 11 more | 7 hr |
| Jun 9, 11:30 PM CDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Madison, Marion, Newton and 2 more | 60 min |
| Jun 10, 1:12 AM CDT | Mesoscale Discussion | SPC | Craighead, Crittenden, Cross, Faulkner, Greene, Independence and 13 more | 33 min |
| Jun 10, 1:29 AM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Cleburne, Crittenden, Cross, Faulkner, Independence and 12 more | 3 hr |
| Jun 10, 2:26 AM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Cleburne, Conway and 12 more | 64 min |
| Jun 10, 3:33 AM CDT | Mesoscale Discussion | SPC | Fulton | 27 min |
| Jun 10, 4:41 AM CDT | Mesoscale Discussion | SPC | Crittenden, Cross, Lee, Phillips, Poinsett, St. Francis | 34 min |
| Jun 10, 5:20 AM CDT | Mesoscale Discussion | SPC | Clay, Fulton, Greene, Randolph | 55 min |
| Jun 10, 3:46 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 6 hr |
| Jun 10, 6:17 PM CDT | Mesoscale Discussion | SPC | Baxter, Bradley, Calhoun, Clark, Cleburne, Cleveland and 44 more | 58 min |
| Jun 10, 6:37 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 48 more | 8 hr |
| Jun 10, 12:30 PM CDT | Mesoscale Discussion | SPC | Allen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 4 more | 90 min |
| Jun 10, 5:15 PM CDT | Tornado Watch | SPC | Bourbon, Cherokee, Crawford | 7 hr |
| Jun 10, 4:51 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Callaway, Camden and 35 more | 84 min |
| Jun 10, 10:44 AM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 11 more | 91 min |
| Jun 10, 11:09 AM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 20 more | 7 hr |
| Jun 10, 1:35 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 15 more | 85 min |
| Jun 10, 2:13 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Carter, Cleveland, Coal, Garvin and 10 more | 10 hr |
| Jun 10, 5:38 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Jefferson and 5 more | 67 min |
Nearby
Mesoscale Discussions in Arkansas, 2009Mesoscale Discussions in Missouri, 2009Mesoscale Discussions in Oklahoma, 2009Every mesoscale discussion in 2009
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.