Alert archive / Ohio / Mesoscale Discussions in 2003
Mesoscale Discussion 1998
The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2003, 2:03 PM EDT for 43 counties in Ohio. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2003, 2:03 PM EDT (18:03 UTC)
- Expired
- Jul 27, 2003, 3:30 PM EDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 43 counties
Allen County, OH, Ashland County, OH, Auglaize 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, Delaware County, OH, Erie County, OH, Franklin County, OH, Geauga County, OH, Hancock County, OH, Hardin County, OH, Holmes County, OH, Huron 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, Miami County, OH, Morrow 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, Wyandot County, OH
The radar
The Cleveland radar (KCLE), 98 km from the middle of the area, began a volume at 18:05 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.
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.1 hours before the alert went out and 178 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1276 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
967 ACUS11 KWNS 271803 SWOMCD SPC MCD 271803 PAZ000-OHZ000-271930- MESOSCALE DISCUSSION 1998 NWS STORM PREDICTION CENTER NORMAN OK 0103 PM CDT SUN JUL 27 2003 AREAS AFFECTED...NRN OH CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 271803Z - 271930Z A SEVERE TSTM WATCH WILL LIKELY BE NEEDED ACROSS PORTIONS OF NRN OH SHORTLY. STRONG TSTMS WERE CONTINUING TO BACKBUILD ALONG PREFRONTAL TROUGH ACROSS LAKE ERIE AND NERN OH THIS AFTERNOON. MEANWHILE...ADDITIONAL ACTIVITY WAS SPREADING EWD ALONG PREFRONTAL CONVERGENCE AXIS ACROSS NERN IND. LATEST OBJECTIVE ANALYSIS DATA INDICATES THAT WARM SECTOR AIRMASS ACROSS THE AREA WAS BECOMING INCREASINGLY UNSTABLE WITH MLCAPE VALUES TO ABOUT 1000 J/KG OVER N-CNTRL OH...AND AS HIGH AS 1500 J/KG OVER NWRN OH. EXPECT LINEAR CONVECTION TO CLOSE THE GAP ACROSS NRN OH OVER THE NEXT FEW HOURS AS CAP WEAKENS AND HEIGHT FALLS ASSOCIATED WITH STRONG SRN ONTARIO SHORT WAVE SPREAD ACROSS THE REGION. MARGINAL DEEP LAYER SHEAR BUT MODEST UNIDIRECTIONAL FLOW COUPLED WITH STRONG INSTABILITY SHOULD SUPPORT A FEW DAMAGING WIND GUSTS IN ADDITION TO HAIL AND HEAVY RAIN. ..CARBIN.. 07/27/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...PBZ...RLX...CLE...ILN...IWX... 41528196 41688051 40528075 39818259 39708396 39968467 41268455
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 2:30 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Ashland, Auglaize, Belmont, Carroll, Champaign and 52 more | 6 hr |
| Jul 27, 5:40 PM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Auglaize, Belmont, Carroll, Champaign and 53 more | 2 hr |
Nearby
Mesoscale Discussions in Ohio, 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.