Alert archive / Ohio / Mesoscale Discussions in 2012
Mesoscale Discussion 1402
The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2012, 8:00 AM EDT for 24 counties in Ohio; 10 counties in West Virginia. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Jul 5, 2012, 8:00 AM EDT (12:00 UTC)
- Expired
- Jul 5, 2012, 9:30 AM EDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 34 counties
Athens County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Fairfield County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Holmes County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Mahoning County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Stark County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Brooke County, WV, Doddridge County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV, Pleasants County, WV, Ritchie County, WV, Tyler County, WV, Wetzel County, WV, Wood County, WV
The radar
The Pittsburgh radar (KPBZ), 122 km from the middle of the area, began a volume at 12:01 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
Pittsburgh, PA (KPIT), launched 12:00Z, 0.0 hours before the alert went out and 127 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
- 86 J/kg
- Mixed-layer CIN
- -306 J/kg
- Mixed-layer LCL
- 1864 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
199
ACUS11 KWNS 051200
SWOMCD
SPC MCD 051200
WVZ000-PAZ000-OHZ000-051330-
MESOSCALE DISCUSSION 1402
NWS STORM PREDICTION CENTER NORMAN OK
0700 AM CDT THU JUL 05 2012
AREAS AFFECTED...CENTRAL/EASTERN OH TO FAR WESTERN PA/FAR NORTHERN
WV
CONCERNING...SEVERE THUNDERSTORM WATCH 468...
VALID 051200Z - 051330Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 468
CONTINUES.
SUMMARY...ISOLATED WIND DAMAGE/MARGINALLY SEVERE HAIL WILL REMAIN
POSSIBLE ACROSS EAST-CENTRAL OH IN THE SHORT-TERM...AND PERHAPS
DEVELOP INTO SOUTH-CENTRAL/SOUTHEAST OH AND ADJACENT FAR NORTHERN WV
THROUGH MID/LATE MORNING. SEVERE TSTM WATCH 468 CONTINUES...AND
CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED FOR AN ADDITIONAL
WATCH TO THE SOUTH OF WW 468.
DISCUSSION...A PERSISTENT SOUTHEASTWARD MOVING MCS/ASSOCIATED GUST
FRONT CONTINUES TO STEADILY PROGRESS SOUTH-SOUTHEASTWARD ACROSS
EAST-CENTRAL/NORTHEAST OH AS OF 1145Z. A 47 KT WIND GUST WAS
RECENTLY /1138Z/ MEASURED AT THE WOOSTER-WAYNE CITY ASOS. THE
INTEGRITY OF THE CONVECTIVE LINE/ASSOCIATED LIGHTING HAS DIMINISHED
ESPECIALLY ON ITS EASTERN EXTENT...AS IT ENCOUNTERS A MORE STABLE
AIRMASS TOWARD WESTERN PA. NONETHELESS...CURRENT FORWARD MOTION OF
THE MCS/ASSOCIATED GUST FRONT WILL CONTINUE TO ACCOUNT FOR THE
POSSIBILITY OF WIND DAMAGE ACROSS THE EASTERN HALF OF OH AND PERHAPS
NORTHERN WV/FAR WESTERN PA...WITH THE STRONGEST UPDRAFTS/MOST
SUSTAINED UPLIFT LIKELY TO REMAIN ON THE WEST/SOUTHWESTERN-MOST
FLANK OF THE MCS/GUST FRONT. THE NEED FOR A WATCH TO THE SOUTH OF WW
468 IS UNCERTAIN IN THE SHORT TERM...BUT CONVECTIVE TRENDS WILL
CONTINUE TO BE MONITORED...AND AT THE VERY LEAST...A LOCAL WFO
EXTENSION /AREA/ MAY BE WARRANTED.
..GUYER.. 07/05/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PBZ...RLX...CLE...ILN...
LAT...LON 40058292 40798208 41048074 40898044 40118031 39168053
38858242 40058292SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 9:48 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Carroll, Champaign, Clark, Clinton and 35 more | 87 min |
| Jul 4, 10:19 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Athens, Auglaize, Belmont, Brown, Butler and 46 more | 4 hr |
| Jul 5, 4:12 AM EDT | Mesoscale Discussion | SPC | Cuyahoga, Erie, Huron, Lake, Lorain, Lucas and 2 more | 93 min |
| Jul 5, 6:16 AM EDT | Severe Thunderstorm Watch | SPC | Ashland, Ashtabula, Carroll, Columbiana, Coshocton, Crawford and 21 more | 3 hr |
| Jul 5, 11:14 AM EDT | Mesoscale Discussion | SPC | Gallia, Lawrence | 91 min |
| Jul 5, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | Lawrence | 7 hr |
| Jul 5, 3:27 PM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Defiance, Fulton, Hancock, Hardin and 14 more | 93 min |
| Jul 5, 5:58 PM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Butler, Champaign, Clark, Clermont and 33 more | 92 min |
| Jul 4, 8:05 PM EDT | Mesoscale Discussion | SPC | Berkeley, Grant, Hampshire, Hardy, Jefferson, Mineral and 2 more | 55 min |
| Jul 5, 2:57 PM EDT | Mesoscale Discussion | SPC | Greenbrier, McDowell, Mercer, Monroe, Summers | 2 hr |
Nearby
Mesoscale Discussions in Ohio, 2012Mesoscale Discussions in West Virginia, 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.