Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 201

March 6, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Mar 6, 2003, 5:18 AM EST for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Mar 6, 2003, 5:18 AM EST (10:18 UTC)
Expired: Mar 6, 2003, 9:15 AM EST
In force: 4 hr
Issued by: the Storm Prediction Center

All 43 counties

Garrett County, MD, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Guernsey County, OH, Harrison County, OH, Holmes County, OH, Jefferson County, OH, Mahoning County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Stark County, OH, Tuscarawas County, OH, Washington County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Fayette County, PA, Greene County, PA, Huntingdon County, PA, Indiana County, PA, Lawrence County, PA, Somerset County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Taylor County, WV, Tyler County, WV, Wetzel County, WV

The radar

The Pittsburgh radar (KPBZ), 56 km from the middle of the area, began a volume at 10:20 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 nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 10.3 hours before the alert went out and 40 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: 538 m above ground
0-6 km bulk shear: 91 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 267 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.

802 
ACUS11 KWNS 061018
SWOMCD
SPC MCD 061018 
OHZ000-VAZ000-PAZ000-MDZ000-061415-

MESOSCALE DISCUSSION 0201
NWS STORM PREDICTION CENTER NORMAN OK
0418 AM CST THU MAR 06 2003

AREAS AFFECTED...SERN OH...EXTREME NRN WV...SWRN PA...EXTREME WRN
MD

CONCERNING...WINTER MIXED PRECIPITATION 

VALID 061018Z - 061415Z

POCKETS OF LIGHT TO MDT FREEZING RAIN WITH ACCUMULATIONS OF
0.01-0.05 / HR WILL BE LIKELY OVER THE NEXT SEVERAL HOURS OVER
NRN WV AND SWRN PA.  ISOLATED RATES OF 0.10 / HR WILL BE POSSIBLE
WITH ANY CONVECTIVE ELEMENTS.



LATEST SURFACE ANALYSIS SHOWS SUB FREEZING AIR EXTENDING FROM
JUST SOUTH OF AOO TO CKB TO PKB.  THE SHALLOW LAYER OF COLD AIR
WILL LIKELY REMAIN IN PLACE AND MOVE SLIGHTLY FURTHER SOUTH OVER
THE NEXT SEVERAL HOURS AS SURFACE WINDS BACK IN RESPONSE TO
DEVELOPING LOW.  GIVEN CONTINUED WARM AIR ADVECTION JUST OFF THE
SURFACE...A MIXTURE OF FREEZING RAIN AND SLEET IS EXPECTED FROM
NRN WV INTO MUCH OF SWRN PA...ESPECIALLY THROUGH 14Z.  MDT BANDS
OF PRECIPITATION ARE EXPECTED TO FORM ALONG A STRENGTHENING W-E
ORIENTED FRONTOGENETIC FORCING AXIS.  PRECIPITATION TYPE WILL
THEN CHANGE OVER TO ALL SNOW AS STRONG COLD ADVECTION COMMENCES
BETWEEN 14-16Z.

..JEWELL.. 03/06/2003

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

39478211 40728234 41108057 41147920 40837785 40507784
40017813 39547885 39357936 39278005 39348140

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 5, 9:36 PM EST	Mesoscale Discussion	SPC	Adams, Athens, Belmont, Brown, Butler, Carroll and 33 more	6 hr
Mar 6, 7:13 AM EST	Mesoscale Discussion	SPC	Bradford, Carbon, Columbia, Lackawanna, Luzerne, Lycoming and 8 more	7 hr

Nearby

Mesoscale Discussions in Ohio, 2003 Mesoscale Discussions in Pennsylvania, 2003 Mesoscale Discussions in West Virginia, 2003 Every 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.