Alert archive / Ohio / Mesoscale Discussions in 2012

Mesoscale Discussion 208

March 2, 20124 states

The Storm Prediction Center issued this mesoscale discussion at Mar 2, 2012, 11:30 AM EST for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Mar 2, 2012, 11:30 AM EST (16:30 UTC)
Expired
Mar 2, 2012, 1:00 PM EST
In force
90 min
Issued by
the Storm Prediction Center
All 114 counties

Adams County, IN, Blackford County, IN, Dearborn County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Henry County, IN, Jay County, IN, Ohio County, IN, Randolph County, IN, Union County, IN, Wayne County, IN, Wells County, IN, Bath County, KY, Boone County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carter County, KY, Elliott County, KY, Fleming County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Nicholas County, KY, Pendleton County, KY, Robertson County, KY, Rowan County, KY, Adams County, OH, Allen 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, Coshocton County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Harrison County, OH, Henry County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Jackson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Medina County, OH, Meigs County, OH, Mercer County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Paulding County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Ross County, OH, Sandusky County, OH, Scioto County, OH, Seneca County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Tuscarawas County, OH, Union County, OH, Van Wert County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH, Cabell County, WV, Jackson County, WV, Mason County, WV, Pleasants County, WV, Tyler County, WV, Wayne County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 54 km from the middle of the area, began a volume at 16:33 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.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 4.5 hours before the alert went out and 52 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2012-03-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2012-03-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 217 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
1876 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
217 m²/s²
0-3 km storm-relative helicity
254 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.

800 
ACUS11 KWNS 021630
SWOMCD
SPC MCD 021630 
WVZ000-OHZ000-KYZ000-INZ000-021800-

MESOSCALE DISCUSSION 0208
NWS STORM PREDICTION CENTER NORMAN OK
1030 AM CST FRI MAR 02 2012

AREAS AFFECTED...PARTS OF ERN IND...NERN KY...MUCH OF OH AND
ADJACENT WEST VIRGINIA

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 

VALID 021630Z - 021800Z

A WATCH IS NOT NECESSARILY ANTICIPATED IN THE NEAR TERM...BUT ONE
PROBABLY WILL BE NEEDED LATER THIS AFTERNOON.

THE SEVERE HAIL POTENTIAL ASSOCIATED WITH STORMS SPREADING
NORTHEASTWARD WITHIN AN ELEVATED WARM ADVECTION REGIME...IN ADVANCE
OF THE SURFACE WARM FRONT LIFTING NORTHWARD THROUGH THE OHIO
VALLEY...MAY BE LIMITED ENOUGH TO PRECLUDE A SEVERE THUNDERSTORM
WATCH ISSUANCE.  HOWEVER...THE RISK FOR SEVERE STORMS IS EXPECTED TO
INCREASE LATER THIS AFTERNOON...AS THE WARM SECTOR OF A DEEP SURFACE
CYCLONE...MIGRATING NORTHEAST OF THE MIDDLE MISSISSIPPI VALLEY INTO
THE GREAT LAKES REGION...ADVECTS NORTHEAST OF THE LOWER OHIO VALLEY.
 AT THE PRESENT TIME...IT APPEARS THAT A TORNADO WATCH COULD BECOME
NECESSARY CLOSER TO THE 21-22Z TIME FRAME.

..KERR.. 03/02/2012

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

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

LAT...LON   40098574 41488471 41528280 41138084 39468082 38148240
            38048353 38468465 40098574

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 2, 4:40 AM ESTMesoscale DiscussionSPCCrawford, Dubois, Harrison, Perry, Pike, Spencer and 1 more65 min
Mar 2, 5:25 AM ESTMesoscale DiscussionSPCClay, Daviess, Gibson, Greene, Knox, Martin and 4 more95 min
Mar 2, 6:52 AM ESTSevere Thunderstorm WatchSPCBartholomew, Boone, Brown, Carroll, Clay, Clinton and 33 more6 hr
Mar 2, 8:50 AM ESTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clay, Daviess, Dearborn and 38 more85 min
Mar 2, 10:22 AM ESTMesoscale DiscussionSPCBrown, Clark, Crawford, Daviess, Dubois, Floyd and 17 more113 min
Mar 2, 10:54 AM ESTTornado Watch PDSSPCBoone, Carroll, Clay, Clinton, Daviess, Fountain and 26 more6 hr
Mar 2, 11:02 AM ESTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clay, Fountain, Greene and 14 more88 min
Mar 2, 1:02 PM ESTTornado Watch PDSSPCBartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 25 more8 hr
Mar 2, 1:05 PM ESTMesoscale DiscussionSPCBartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 27 more85 min
Mar 2, 3:35 PM ESTMesoscale DiscussionSPCClark, Dearborn, Floyd, Franklin, Harrison, Jefferson and 4 more85 min
Mar 2, 12:46 PM ESTMesoscale DiscussionSPCBell, McCreary, Whitley29 min
Mar 2, 4:19 PM ESTTornado Watch PDSSPCBell, Boyd, Breathitt, Carter, Clay, Elliott and 18 more6 hr
Mar 2, 6:13 PM ESTMesoscale DiscussionSPCBath, Boyd, Breathitt, Carter, Clark, Clay and 30 more62 min

Nearby

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