Alert archive / Kentucky / Mesoscale Discussions in 2008
Mesoscale Discussion 539
The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2008, 1:39 PM CDT for 5 states. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2008, 1:39 PM CDT (18:39 UTC)
- Expired
- Apr 3, 2008, 2:45 PM CDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 61 counties
Alexander County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, White County, IL, Williamson County, IL, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Breckinridge County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Edmonson County, KY, Fulton County, KY, Graves County, KY, Grayson County, KY, Hancock County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Warren County, KY, Webster County, KY, Cape Girardeau County, MO, Mississippi County, MO, New Madrid County, MO, Scott County, MO, Stoddard County, MO, Henry County, TN, Houston County, TN, Lake County, TN, Montgomery County, TN, Obion County, TN, Robertson County, TN, Stewart County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 53 km from the middle of the area, began a volume at 18:38 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 12:00Z, 6.7 hours before the alert went out and 171 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
- 610 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 264 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 031839 SWOMCD SPC MCD 031839 KYZ000-INZ000-TNZ000-ILZ000-MOZ000-031945- MESOSCALE DISCUSSION 0539 NWS STORM PREDICTION CENTER NORMAN OK 0139 PM CDT THU APR 03 2008 AREAS AFFECTED...SRN IL/IN...NWRN TN AND WRN KY CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY VALID 031839Z - 031945Z ELEVATED CONVECTION LOCATED IN ERN MO AT 1830Z WILL CONTINUE TO PROGRESS EWD OVER THE NEXT FEW HOURS. THE STRONGEST ACTIVITY WILL DEVELOP ALONG A SURFACE TROUGH OF LOW PRESSURE/WEAK FRONTOGENESIS ANALYZED THROUGH SRN MO EWD INTO KY. WV IMAGERY SHOWS A WEAK UPPER SHORT WAVE TROUGH HAS AIDED IN SOME DEGREE OF COOLING ALOFT...WHILE LOW LEVEL WAA ABOVE A SURFACE INVERSION HAS CREATED SUFFICIENT ELEVATED INSTABILITY FOR THUNDERSTORM DEVELOPMENT. GIVEN AMPLE MID LEVEL SHEAR...MARGINAL TO SEVERE HAIL WILL CONTINUE TO BE A THREAT. MAIN CONVECTION IS EXPECTED TO MOVE EWD INTO A LESS FAVORABLE AIRMASS AS THE UPPER LOW...STRONGER SHEAR...AND HIGHER ELEVATED INSTABILITY LAG TO THE WEST. ..HURLBUT.. 04/03/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...LMK...OHX...PAH...MEG... 36258958 36689007 37678977 38158835 38258680 37648622 37258608 36588664 36248768 36128915
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 3, 9:51 AM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Boone, Callaway and 37 more | 84 min |
| Apr 3, 2:39 PM CDT | Mesoscale Discussion | SPC | McDonald | 66 min |
Nearby
Mesoscale Discussions in Kentucky, 2008Mesoscale Discussions in Illinois, 2008Mesoscale Discussions in Tennessee, 2008Every mesoscale discussion in 2008
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.