Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 882

May 9, 200315 counties in Ohio; 10 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 5:36 PM EDT for 15 counties in Ohio; 10 counties in West Virginia. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued
May 9, 2003, 5:36 PM EDT (21:36 UTC)
Expired
May 9, 2003, 7:30 PM EDT
In force
114 min
Issued by
the Storm Prediction Center
All 25 counties

Athens County, OH, Delaware County, OH, Fairfield County, OH, Franklin County, OH, Hocking County, OH, Licking County, OH, Madison County, OH, Meigs County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Vinton County, OH, Washington County, OH, Braxton County, WV, Calhoun County, WV, Gilmer County, WV, Jackson County, WV, Lewis County, WV, Pleasants County, WV, Ritchie County, WV, Roane County, WV, Wirt County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 125 km from the middle of the area, began a volume at 21:38 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 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, 9.6 hours before the alert went out and 153 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 2003-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1208 joules per kilogram.LCLLFCEL10008507005003002001001 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 2003-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 452 square meters per square second.1939587897Sfc1 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
1208 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
550 m above ground
0-6 km bulk shear
81 kt
0-1 km storm-relative helicity
452 m²/s²
0-3 km storm-relative helicity
486 m²/s²
Significant tornado parameter
3.9
Supercell composite
19.8

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 9, 2:21 AM EDTMesoscale DiscussionSPCAuglaize, Butler, Champaign, Clark, Clermont, Clinton and 13 more84 min
May 9, 2:45 AM EDTSevere Thunderstorm WatchSPCAllen, Auglaize, Butler, Champaign, Clark, Clinton and 31 more5 hr
May 9, 6:04 AM EDTMesoscale DiscussionSPCAllen, Auglaize, Butler, Champaign, Clark, Clinton and 32 more86 min
May 9, 3:02 PM EDTMesoscale DiscussionSPCAdams, Brown, Clermont, Clinton, Hamilton, Highland and 4 more2 hr
May 9, 3:40 PM EDTSevere Thunderstorm WatchSPCAdams, Brown, Clermont, Hamilton, Highland, Pike and 2 more5 hr
May 9, 6:00 PM EDTSevere Thunderstorm WatchSPCAthens, Fairfield, Gallia, Hocking, Jackson, Lawrence and 6 more5 hr
May 9, 12:53 PM EDTMesoscale DiscussionSPCFayette, Greenbrier, Monroe, Nicholas, Pocahontas, Raleigh and 3 more3 hr
May 9, 2:05 PM EDTTornado WatchSPCGreenbrier, Monroe6 hr
May 9, 3:55 PM EDTMesoscale DiscussionSPCGreenbrier, Monroe2 hr
May 9, 7:35 PM EDTSevere Thunderstorm WatchSPCLogan, Mingo5 hr

Nearby

Mesoscale Discussions in Ohio, 2003Mesoscale Discussions in West Virginia, 2003Every mesoscale discussion in 2003

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.