Alert archive / Massachusetts / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 280

May 24, 200410 counties in Massachusetts; Rensselaer County, New York; 5 counties in Rhode Island

The Storm Prediction Center issued this severe thunderstorm watch at May 24, 2004, 5:45 PM EDT for 10 counties in Massachusetts; Rensselaer County, New York; 5 counties in Rhode Island. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 24, 2004, 5:45 PM EDT (21:45 UTC)
Expired: May 24, 2004, 11:00 PM EDT
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Berkshire County, MA, Bristol County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Rensselaer County, NY, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 111 km from the middle of the area, began a volume at 21:48 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.

Warnings issued inside it

10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 24, 5:51 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	54 min
May 24, 6:03 PM EDT	Severe Thunderstorm Warning	BOX	Hampden	27 min
May 24, 6:32 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	58 min
May 24, 6:39 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer	66 min
May 24, 6:44 PM EDT	Tornado Warning	ALY	Rensselaer	46 min
May 24, 7:29 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	46 min
May 24, 7:48 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	57 min
May 24, 8:07 PM EDT	Severe Thunderstorm Warning	BOX	Hampden	38 min
May 24, 8:53 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	52 min
May 24, 9:14 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	46 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.8 hours before the alert went out and 150 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: 2 J/kg
Mixed-layer CIN: -444 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 10:03 AM EDT	Mesoscale Discussion	SPC		117 min
May 24, 11:00 AM EDT	Severe Thunderstorm Watch	SPC		5 hr
May 24, 7:25 PM EDT	Mesoscale Discussion	SPC		95 min
May 24, 4:55 PM EDT	Severe Thunderstorm Watch	SPC	Berkshire	4 hr
May 24, 5:43 PM EDT	Mesoscale Discussion	SPC	Berkshire	47 min
May 23, 11:02 PM EDT	Mesoscale Discussion	SPC	Cayuga, Essex, Fulton, Hamilton, Herkimer, Lewis and 8 more	3 hr
May 24, 12:24 PM EDT	Mesoscale Discussion	SPC	Allegany, Broome, Chemung, Chenango, Cortland, Ontario and 6 more	2 hr
May 24, 12:40 PM EDT	Severe Thunderstorm Watch	SPC	Allegany, Broome, Cattaraugus, Chemung, Chenango, Cortland and 11 more	4 hr
May 24, 3:00 PM EDT	Mesoscale Discussion	SPC	Albany, Broome, Chenango, Cortland, Delaware, Fulton and 16 more	90 min

Nearby

Severe Thunderstorm Watches in Massachusetts, 2004 Severe Thunderstorm Watches in Connecticut, 2004 Severe Thunderstorm Watches in Rhode Island, 2004 Every severe thunderstorm watch in 2004

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.