Alert archive / Ohio / Mesoscale Discussions in 2012

Mesoscale Discussion 392

March 30, 20124 states

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2012, 7:02 PM EDT for 4 states. It was in force for 28 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2012, 7:02 PM EDT (23:02 UTC)
Expired: Mar 30, 2012, 7:30 PM EDT
In force: 28 min
Issued by: the Storm Prediction Center

All 121 counties

Bartholomew County, IN, Brown County, IN, Clay County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Fayette County, IN, Franklin County, IN, Greene County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Ohio County, IN, Owen County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Sullivan County, IN, Switzerland County, IN, Union County, IN, Washington County, IN, Wayne County, IN, Boone County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Fleming County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Trimble County, KY, Adams County, OH, Ashland County, OH, Athens County, OH, Auglaize 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, Crawford County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Hardin County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Meigs County, OH, Miami 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, Preble County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Shelby County, OH, Stark County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Brooke County, WV, Cabell County, WV, Hancock County, WV, Jackson County, WV, Marshall County, WV, Mason County, WV, Ohio County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 20 km from the middle of the area, began a volume at 23:05 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.

Severe Thunderstorm Watch 120Mar 30, 7:45 PM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.0 hours before the alert went out and 18 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 249 m²/s²
0-3 km storm-relative helicity: 364 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

859 
ACUS11 KWNS 302303
SWOMCD
SPC MCD 302302
PAZ000-WVZ000-OHZ000-KYZ000-INZ000-ILZ000-302330-

MESOSCALE DISCUSSION 0392
NWS STORM PREDICTION CENTER NORMAN OK
0602 PM CDT FRI MAR 30 2012

AREAS AFFECTED...ERN AND SRN OH/NRN AND NWRN WV INCLUDING THE NRN
PANHANDLE/PART OF WRN PA AND NRN KY

CONCERNING...SEVERE THUNDERSTORM WATCH 118...

VALID 302302Z - 302330Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 118
CONTINUES.

A NEW SEVERE TSTM WATCH WILL BE COORDINATED SOON FOR PARTS OF ERN
AND SRN OH INTO SRN IND...NRN KY AND NWRN-NRN WV INCLUDING THE
PANHANDLE.

THE SEVERE WEATHER THREAT CONTINUES ACROSS WW 118 AS THE COLD FRONT
MOVES ESEWD INTO A MODERATELY UNSTABLE AIR MASS.  OBJECTIVE ANALYSES
INDICATED EFFECTIVE BULK SHEAR REMAINED STRONGEST ACROSS WRN-CENTRAL
INTO SERN OH AND EXTENDING INTO WV AND FAR WRN PA WITH VALUES OF
40-50 KT.  THIS COMBINED WITH THE INSTABILITY WILL SUPPORT
ADDITIONAL ORGANIZED STORMS...WITH HAIL AND DAMAGING WINDS THE
PRIMARY THREATS INTO THE EVENING.

FARTHER E/SE...STRONG SURFACE HEATING INTO SERN OH HAS RESULTED IN
SUFFICIENT DESTABILIZATION TO SUPPORT STRONG TO SEVERE TSTMS...GIVEN
THE AFOREMENTIONED STRONG SHEAR...AS UPSTREAM ACTIVITY MOVES INTO
THIS REGION.  FOR THIS REASON...A NEW WW WILL BE COORDINATED SOON S
THROUGH E OF WW 118.

..PETERS.. 03/30/2012

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...PBZ...RLX...CLE...JKL...ILN...LMK...IWX...IND...
PAH...ILX...

LAT...LON   39288755 40058479 40668427 40948251 41018181 40798061
            40508050 39568059 38888113 38358152 38328327 38438438
            38588678 38508758 39288755

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 30, 2:12 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 54 more	93 min
Mar 30, 3:24 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 44 more	7 hr
Mar 30, 3:51 PM EDT	Severe Thunderstorm Watch	SPC	Gibson, Pike, Posey, Vanderburgh, Warrick	7 hr
Mar 30, 7:47 PM EDT	Severe Thunderstorm Watch	SPC	Bracken, Greenup, Lewis, Mason, Pendleton, Robertson	4 hr

Nearby

Mesoscale Discussions in Ohio, 2012 Mesoscale Discussions in Indiana, 2012 Mesoscale Discussions in Kentucky, 2012 Every 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.