Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 73, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 23, 1998, 1:09 PM EDT for Middlesex County, Massachusetts. It was in force for 46 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
- Jul 23, 1998, 1:09 PM EDT (17:09 UTC)
- Expired
- Jul 23, 1998, 1:55 PM EDT
- In force
- 46 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Whole counties
County Middlesex County, MA
The radar
The Boston radar (KBOX), 63 km from the middle of the area, began a volume at 17:09 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 |
|---|---|---|---|
| Jul 23, 1:12 PM EDT | Hail 0.75 | Acton, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 23, 12:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Chatham, MA (KCHH), launched 12:00Z, 5.2 hours before the alert went out and 148 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
- 1192 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
910 WUUS1 KBOS 231707 RRA SVRBOS MAC017-231755- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 109 PM EDT THU JUL 23 1998 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MIDDLESEX COUNTY IN NORTHEASTERN MASSACHUSETTS * UNTIL 155 PM EDT * AT 105 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTHEAST OF BOXBORO...MOVING NORTHEAST AT 30 MPH. * TOWNS IN/NEAR THE PATH OF THIS STORM INCLUDE... ACTON AT 108 PM CARLISLE AT 115 PM CHELMSFORD AT 125 PM BILLERICA AT 125 PM SEVERE THUNDERSTORMS PRODUCE LARGE HAIL AND/OR WINDS STRONG ENOUGH TO KNOCK DOWN TREES AND POWER LINES. MOVE INDOORS AND STAY AWAY FROM WINDOWS. TORRENTIAL DOWNPOURS WILL ALSO ACCOMPANY THIS STORM. GAF/WD
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 1:28 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 32 min |
| Jul 23, 1:45 PM EDT | Tornado Warning | BOX | Worcester | 50 min |
| Jul 23, 2:01 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex | 44 min |
| Jul 23, 2:06 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 49 min |
| Jul 23, 2:18 PM EDT | Severe Thunderstorm Warning | BOX | Norfolk | 57 min |
| Jul 23, 2:27 PM EDT | Severe Thunderstorm Warning | BOX | Suffolk | 48 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.