May 2, 2002
Bow Echoes and Non-tornadic Supercells

Radar reflectivity 3:23 PM May 2, 2002 Radar reflectivity 3:28 PM May 2, 2002 Radar reflectivity 3:33 PM May 2, 2002 Radar reflectivity 3:38 PM May 2, 2002

Widespread wind damage was observed from Farmville into Amelia and Nottoway Counties.  Note the bowing in the reflectivity signature through the Farmville area.


Radar base velocity 3:23 PM May 2, 2002 Radar base velocity 3:28 PM May 2, 2002 Radar base velocity 3:33 May 2, 2002 Radar base velocity 3:38 May 2, 2002

The base velocity radar imagery showed > 50 knots (58 MPH) of wind (note the color scale on top).


Radar base velocity 4:17 PM on May 2, 2002 Radar base velocity 4:22 PM May 2, 2002 Radar base velocity 4:27 PM May 2, 2002

Wind damage was also observed around the tri-cities area from Colonial Heights and Petersburg through Hopewell and Prince George.  Base velocity radar imagery showed >64 knots (73 MPH) of wind (note the color scale on top).


Radar base reflectivity 3:52 PM May 2, 2002 Radar base reflectivity 4:02 PM May 2, 2002 Radar base reflectivity 4:12 PM May 2, 2002 Radar base reflectivity 4:22 PM May 2, 2002
Radar base reflectivity 4:32 PM May 2, 2002 Radar reflectivity cross section 3:57 PM May 2, 2002 Radar reflectivity cross section 4:02 PM May 2, 2002

The first supercell of the day was on the southern tip of the bow echoes (the bow echoes that produced the wind damage from Farmville through the tri-cities).  Supercell 1 tracked out of Halifax and Charlotte Counties, into Mecklenburg and Brunswick Counties.  Note the inflow notch and periodic appendage, characteristic of a possibly tornadic supercell.  Also note the high reflectivities above 24, 000 Ft and the overhang, seen in the reflectivity cross sections.  This storm did not produce a tornado in Mecklenburg or Brunswick Counties, but produced large hail.


Radar storm-relative motion 3:57 PM May 2, 2002 Radar storm-relative motion 4:17 PM May 2, 2002 Radar storm-relative motion 4:27 PM May 2, 2002 Radar storm-relative motion 4:37 PM May 2, 2002

The storm-relative motion in supercell 1, showed some low-level rotation as it entered Mecklenburg County, but much of the rotation was gone soon after entering Mecklenburg County, and through Brunswick County.


Radar vertically integrated liquid 3:52 PM May 2, 2002 Radar vertically integrated liquid 4:02 PM May 2, 2002 Radar vertically integrated liquid 4:12 PM May 2, 2002 Radar vertically integrated liquid 4:22 PM May 2, 2002

Vertically integrated liquid ranged between 65 g/kg and 80 g/kg, suggesting the presence of large hail.  In fact, hail up to the size of golf balls was reported in supercell 1.


Radar base reflectivity 5:47 PM May 2, 2002 Radar base reflectivity 5:57 PM May 2, 2002 Radar base reflectivity 6:07 PM May 2, 2002 Radar base reflectivity 6:17 PM May 2, 2002 Radar base reflectivity 6:27 PM May 2, 2002
Radar base reflectivity 6:36 PM May 2, 2002 Radar base reflectivity 6:56 PM May 2, 2002 Radar reflectivity cross section 5:57 PM May 2, 2002 Radar reflectivity cross section 6:36 PM May 2, 2002

The second supercell of the day tracked just south of the first supercell.  Supercell 2 tracked out of Halifax and Charlotte Counties, into Mecklenburg and Brunswick Counties in Virginia, and then tracked through northeast North Carolina just south of the Virginia/North Carolina state border.  Note the inflow notch and periodic appendage, characteristic of a possibly tornadic supercell.  Also note the high reflectivities above 24, 000 Ft and the overhang in the reflectivity cross sections.  This storm did not produce a tornado from Mecklenburg and Brunswick Counties, through northeast North Carolina, but did produce large hail.


Radar storm-relative motion 5:47 PM May 2, 2002 Radar storm-relative motion 6:17 PM May 2, 2002 Radar storm-relative motion 6:27 PM May 2, 2002
Radar storm-relative motion 6:36 PM May 2, 2002 Radar storm-relative motion 6:46 PM May 2, 2002 Radar storm-relative motion 6:56 PM May 2, 2002

The storm-relative motion in supercell 2  did not show clear low-level rotation during its track from Mecklenburg County, through Brunswick County and northeast North Carolina.


Radar storm-relative motion 5:47 PM May 2, 2002 Radar storm-relative motion 5:52 PM May 2, 2002 Radar storm-relative motion 6:02 PM May 2, 2002 Radar storm-relative motion 6:12 PM May 2, 2002 Radar storm-relative motion 6:22 PM May 2, 2002
Radar storm-relative motion 6:32 PM May 2, 2002 Radar storm-relative motion 6:41 PM May 2, 2002Radar storm-relative motion 6:51 PM May 2, 2002 Radar storm-relative motion 7:01 PM May 2, 2002

Vertically integrated liquid ranged between 65 g/kg and 80 g/kg, suggesting the presence of large hail.  In fact, hail up to 3" in diameter was observed and measured around Clarksville in Mecklenburg County.  Quarter to golfball sized hail was reported for the remainder of the track of supercell 2.


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