Alert archive / Ohio / Mesoscale Discussions in 2003
Mesoscale Discussion 2002
The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2003, 5:40 PM EDT for 59 counties in Ohio; 35 counties in Pennsylvania; 4 counties in West Virginia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2003, 5:40 PM EDT (21:40 UTC)
- Expired
- Jul 27, 2003, 7:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 98 counties
Allen County, OH, Ashland County, OH, Auglaize County, OH, Belmont County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Franklin County, OH, Geauga County, OH, Guernsey County, OH, Hancock County, OH, Hardin County, OH, Harrison County, OH, Henry County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Miami County, OH, Monroe County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Ottawa County, OH, Paulding County, OH, Perry County, OH, Portage County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Van Wert County, OH, Wayne County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH, Adams County, PA, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Cumberland County, PA, Dauphin County, PA, Elk County, PA, Fayette County, PA, Forest County, PA, Franklin County, PA, Fulton County, PA, Greene County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lawrence County, PA, Mercer County, PA, Mifflin County, PA, Perry County, PA, Snyder County, PA, Somerset County, PA, Union County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV
The radar
The Cleveland radar (KCLE), 97 km from the middle of the area, began a volume at 21:43 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
Pittsburgh, PA (KPIT), launched 12:00Z, 9.7 hours before the alert went out and 139 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
- 15 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
743 ACUS11 KWNS 272141 SWOMCD SPC MCD 272140 PAZ000-MDZ000-WVZ000-OHZ000-272345- MESOSCALE DISCUSSION 2002 NWS STORM PREDICTION CENTER NORMAN OK 0440 PM CDT SUN JUL 27 2003 AREAS AFFECTED...NRN AND CENTRAL OH...MUCH OF PA CONCERNING...SEVERE THUNDERSTORM WATCH 808... VALID 272140Z - 272345Z TRAINING OF STRONG/SEVERE THUNDERSTORMS CONTINUES EWD ACROSS MUCH OF THE NRN HALF OF OHIO WITH INCREASED DEVELOPMENT IN NERN OH INTO NWRN PA. LATEST MESOSCALE ANALYSIS INDICATES THAT THIS ACTIVITY IS SPREADING SWD INTO CENTRAL OH WHERE AXIS OF HIGHER THETA-E VALUES ARE LOCATED. SEVERAL BOW SEGMENTS ARE MOVING ACROSS THIS AREA AS WELL...ONE IS DEVELOPING OVER LORAIN...MEDINA AND ASHLAND COUNTIES...A SECOND IS MOVING OVER VAN WERT...ALLEN AND AUGLAIZE COUNTIES. THIS WILL LEAD TO AREAS OF DAMAGING WINDS ACCOMPANIED BY HEAVY RAIN DURING THE NEXT SEVERAL HOURS. NEW DEVELOPMENT IS OCCURRING OVER SWRN LAKE ERIE NEAR CONVECTIVE BOUNDARY INTERSECTION/WAKE LOW PRESSURE. PRESSURE RISES ARE OCCURRING OVER AREAS OF SRN LAKE MICHIGAN AND SWRN MI...THUS WOULD LOOK FOR INCREASE THREAT OF DAMAGING WINDS OVER LORAIN INTO CUYAHOGA COUNTIES N OF MAIN RAIN BAND DURING THE NEXT FEW HOURS AS WELL. AN ADDITIONAL WW IS BEING CONSIDERED ATTM ACROSS WRN AND CENTRAL PA. ..MCCARTHY.. 07/27/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CTP...LWX...PBZ...RLX...CLE...ILN...IWX... 39798474 40668479 41588471 41568239 41557721 40527651 39727726 39718324
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 2:03 PM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Auglaize, Carroll, Champaign, Clark and 37 more | 87 min |
| Jul 27, 2:30 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Ashland, Auglaize, Belmont, Carroll, Champaign and 52 more | 6 hr |
| Jul 27, 4:31 PM EDT | Mesoscale Discussion | SPC | Blair, Carbon, Centre, Clearfield, Clinton, Columbia and 14 more | 89 min |
| Jul 27, 6:05 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Berks and 31 more | 5 hr |
Nearby
Mesoscale Discussions in Ohio, 2003Mesoscale Discussions in Pennsylvania, 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.