Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 22, NWS Boston/Norton, MA

July 7, 1993Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 7, 1993, 5:01 PM EDT for Worcester County, Massachusetts. It was in force for 59 min.

The area

The counties it named.

The facts

Issued: Jul 7, 1993, 5:01 PM EDT (21:01 UTC)
Expired: Jul 7, 1993, 6:00 PM EDT
In force: 59 min
Issued by: NWS Boston/Norton, MA
Area: Whole counties

County Worcester County, MA

The nearest sounding before it

Albany, NY (KALB), launched 12:00Z, 9.0 hours before the alert went out and 162 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: 1332 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 12 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 7, 3:30 PM EDT, 1 hour 31 minutes before

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Special weather statement, Jul 7, 3:33 PM EDT, 1 hour 28 minutes before

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Special weather statement, Jul 7, 4:10 PM EDT, 51 minutes before

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Special weather statement, Jul 7, 4:11 PM EDT, 50 minutes before

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Special weather statement, Jul 7, 4:45 PM EDT, 16 minutes before

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Special weather statement, Jul 7, 4:50 PM EDT, 11 minutes before

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The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 7, 3:45 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex	60 min
Jul 7, 5:56 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	64 min
Jul 7, 6:43 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	47 min
Jul 7, 5:43 PM EDT	Severe Thunderstorm Warning	BOX	Northwest Hills Planning Region	32 min
Jul 7, 6:14 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	46 min
Jul 7, 7:04 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	26 min
Jul 7, 7:28 PM EDT	Severe Thunderstorm Warning	BOX	Southeastern Connecticut Planning Region	47 min
Jul 7, 6:07 PM EDT	Severe Thunderstorm Warning	BOX	Providence	68 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 1993 Every severe thunderstorm warning in 1993

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.