Alert archive / Ohio / Mesoscale Discussions in 2008
Mesoscale Discussion 1621
The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2008, 6:47 PM EDT for 5 states. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Jun 28, 2008, 6:47 PM EDT (22:47 UTC)
- Expired
- Jun 28, 2008, 7:45 PM EDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 120 counties
Clark County, IN, Dearborn County, IN, Franklin County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Ohio County, IN, Ripley County, IN, Scott County, IN, Switzerland County, IN, Union County, IN, Washington County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Henry County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Trimble County, KY, Adams County, OH, Ashland County, OH, Ashtabula County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Cuyahoga County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Geauga County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Lawrence County, OH, Licking County, OH, Lorain County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Meigs County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Preble County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Allegheny County, PA, Beaver County, PA, Butler County, PA, Crawford County, PA, Erie County, PA, Greene County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Brooke County, WV, Calhoun County, WV, Doddridge County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Ritchie County, WV, Taylor County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Cincinnati radar (KILN), 88 km from the middle of the area, began a volume at 22:47 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.8 hours before the alert went out and 86 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
- 505 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 513 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 282247 SWOMCD SPC MCD 282247 PAZ000-NYZ000-WVZ000-OHZ000-KYZ000-INZ000-282345- MESOSCALE DISCUSSION 1621 NWS STORM PREDICTION CENTER NORMAN OK 0547 PM CDT SAT JUN 28 2008 AREAS AFFECTED...SRN AND ERN OH / FAR WRN PA / FAR NWRN WV CONCERNING...SEVERE THUNDERSTORM WATCH 629... VALID 282247Z - 282345Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 629 CONTINUES. THE THREAT FOR DAMAGING WINDS AND SOME HAIL WILL CONTINUE ACROSS SRN AND ERN PORTIONS OF WW AREA FOR THE NEXT HOUR OR SO. AN ADDITIONAL WW IS NOT CURRENTLY ANTICIPATED. AS OF 2230Z...REGIONAL RADAR IMAGERY INDICATED A QUASI-LINEAR MCS EXTENDING FROM FAR WRN PA SWWD ACROSS SRN OH. THE NERN EXTENSION OF THIS MCS OVER FAR WRN PA HAS RECENTLY ACCELERATED TO AROUND 40 KT WITH TRAILING PORTION MOVING MORE SLOWLY SEWD AT AROUND 30 KT. EXTRAPOLATION OF THESE MOTIONS LIKELY TAKES MCS INTO WWS 630 AND 635 BY 00Z. PRIOR TO THIS TIME...THE COMBINATION OF MODERATE INSTABILITY AND MODESTLY STRONG UNIDIRECTIONAL DEEP LAYER WIND FIELDS WILL SUPPORT A CONTINUED THREAT OF DAMAGING WIND GUSTS AND SOME HAIL WITH THE MOST INTENSE STORMS. ..MEAD.. 06/28/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...BUF...PBZ...RLX...CLE...JKL...ILN...LMK...IND... 38778636 40828292 40858241 42218215 42667974 39337971 38448224 38368645
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 8:10 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Bartholomew, Clark, Crawford, Dearborn, Decatur and 21 more | 4 hr |
| Jun 27, 8:39 PM EDT | Mesoscale Discussion | SPC | Adams, Bartholomew, Clark, Dearborn, Decatur, Fayette and 18 more | 66 min |
| Jun 27, 11:17 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Clark, Crawford, Dearborn, Decatur, Fayette and 17 more | 88 min |
| Jun 28, 10:39 AM EDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 26 more | 66 min |
| Jun 28, 12:02 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 25 more | 88 min |
| Jun 28, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | Bartholomew, Dearborn, Decatur, Fayette, Franklin, Hancock and 16 more | 7 hr |
| Jun 28, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | Clark, Crawford, Floyd, Harrison | 7 hr |
| Jun 28, 3:21 PM EDT | Severe Thunderstorm Watch | SPC | Lake, LaPorte, Porter, Saint Joseph | 7 hr |
| Jun 28, 3:52 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 23 more | 113 min |
| Jun 28, 6:06 PM EDT | Mesoscale Discussion | SPC | Armstrong, Bedford, Blair, Cambria, Cameron, Centre and 17 more | 84 min |
| Jun 28, 6:31 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Armstrong, Bedford, Blair, Bradford, Cambria and 31 more | 5 hr |
Nearby
Mesoscale Discussions in Ohio, 2008Mesoscale Discussions in West Virginia, 2008Mesoscale Discussions in Kentucky, 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.