Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 21, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 31, 1998, 12:06 PM EDT for Essex County, Massachusetts. It was in force for 44 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 31, 1998, 12:06 PM EDT (16:06 UTC)
- Expired
- May 31, 1998, 12:50 PM EDT
- In force
- 44 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Whole counties
County Essex County, MA
The radar
The Boston radar (KBOX), 79 km from the middle of the area, began a volume at 16:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 31, 12:10 PM EDT | Hail 0.75 | Peabody, MA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Chatham, MA (KCHH), launched 12:00Z, 4.1 hours before the alert went out and 131 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
- 2280 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 308 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
614 WUUS1 KBOS 311607 RRA SVRBOS ANZ250-MAC009-311650- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 1206 PM EDT SUN MAY 31 1998 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ESSEX COUNTY INCLUDING ADJACENT COASTAL WATERS IN NORTHEASTERN MASSACHUSETTS * UNTIL 1250 PM EDT * AT 1205 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTH OF DRACUT... MOVING EAST NORTHEAST AT 35 MPH. * TOWNS IN/NEAR THE PATH OF THIS STORM INCLUDE... ANDOVER...BOXFORD...ROWLEY AND THEN THE PLUM ISLAND AREA BY 1245 PM THIS STORM HAS PRODUCED LARGE HAIL AND KNOCKED DOWN SMALL TREES ACROSS WORCESTER AND MIDDLESEX COUNTIES AND WILL CONTINUE TO DO SO IN ITS TRACK ACROSS ESSEX COUNTY. MOST RECENTLY DIME TO NICKEL SIZE HAIL WAS REPORTED IN THE LOWELL AREA. DRAG/THOMPSON
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 11:03 AM EDT | Severe Thunderstorm Warning | BOX | Worcester | 47 min |
| May 31, 11:46 AM EDT | Severe Thunderstorm Warning | BOX | Middlesex | 44 min |
| May 31, 5:25 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 60 min |
| May 31, 5:30 PM EDT | Tornado Warning | BOX | Franklin | 50 min |
| May 31, 5:39 PM EDT | Tornado Warning | BOX | Hampshire | 46 min |
| May 31, 5:53 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 47 min |
| May 31, 6:13 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex | 47 min |
| May 31, 6:23 PM EDT | Severe Thunderstorm Warning | BOX | Franklin | 32 min |
| May 31, 6:34 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 61 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 1998Every severe thunderstorm warning in 1998
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.