Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 711
The Storm Prediction Center issued this mesoscale discussion at May 5, 2012, 5:06 AM CDT for 4 states. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- May 5, 2012, 5:06 AM CDT (10:06 UTC)
- Expired
- May 5, 2012, 7:00 AM CDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 45 counties
Gallatin County, IL, Hardin County, IL, White County, IL, Posey County, IN, Vanderburgh County, IN, Warrick County, IN, Adair County, KY, Allen County, KY, Barren County, KY, Butler County, KY, Caldwell County, KY, Christian County, KY, Clinton County, KY, Crittenden County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hart County, KY, Henderson County, KY, Hopkins County, KY, Logan County, KY, Lyon County, KY, McLean County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Simpson County, KY, Todd County, KY, Union County, KY, Warren County, KY, Webster County, KY, Clay County, TN, Jackson County, TN, Macon County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN
The radar
The Nashville radar (KOHX), 72 km from the middle of the area, began a volume at 10:09 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
Nashville Metro, TN (KBNA), launched 00:00Z, 10.1 hours before the alert went out and 85 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
- 1078 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1542 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 111 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
368 ACUS11 KWNS 051007 SWOMCD SPC MCD 051006 KYZ000-TNZ000-INZ000-ILZ000-051200- MESOSCALE DISCUSSION 0711 NWS STORM PREDICTION CENTER NORMAN OK 0506 AM CDT SAT MAY 05 2012 AREAS AFFECTED...SRN KY...NRN TN CONCERNING...SEVERE THUNDERSTORM WATCH 245... VALID 051006Z - 051200Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 245 CONTINUES. SUMMARY...A LINE OF STORMS WILL LIKELY PERSIST FOR A WHILE LONGER...BUT IT APPEARS THAT SEVERITY MAY DECREASE GRADUALLY. DISCUSSION...A LINE OF STORMS CONTINUED TO DROP SWD THROUGH WW 245 AND NOW ENTERING NRN MIDDLE TN. ERN PORTIONS OF THE LINE HAVE BEEN THE MOST IMPRESSIVE ON RADAR WITH CONVECTION KEEPING UP WITH THE GUST FRONT. HOWEVER...LATEST TRENDS INDICATE THE GUST FRONT SURGING FARTHER AWAY FROM THE PARENT STORMS. IF THIS TREND CONTINUES...THEN A GENERAL WEAKENING IS EXPECTED. CONDITIONS WILL CONTINUE TO BE MONITORED...BUT IT IS NOT CLEAR THAT ANOTHER WATCH WILL BE NEEDED OVER ERN TN AS STORMS INTERACT WITH LESSER INSTABILITY AND COOLER BOUNDARY LAYER TEMPERATURES. ..JEWELL.. 05/05/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...JKL...LMK...OHX...PAH... LAT...LON 35788506 37048826 38508830 37248507 35788506
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:57 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Christian, Clay, Clinton, Crawford and 25 more | 63 min |
| May 4, 10:18 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clinton, Franklin, Greene, Hamilton and 11 more | 87 min |
| May 4, 10:35 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Clinton, Edwards, Fayette, Franklin and 24 more | 8 hr |
| May 5, 12:55 AM CDT | Mesoscale Discussion | SPC | Edwards, Gallatin, Hamilton, Hardin, Saline, Wabash and 1 more | 95 min |
| May 5, 2:49 AM CDT | Severe Thunderstorm Watch | SPC | Posey, Spencer, Vanderburgh, Warrick | 4 hr |
Nearby
Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Tennessee, 2012Mesoscale Discussions in Illinois, 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.