Alert archive / Massachusetts / Special Weather Statements in 2017
Special Weather Statement, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this special weather statement at Aug 23, 2017, 2:11 AM EDT for Middlesex County, Massachusetts. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 23, 2017, 2:11 AM EDT (06:11 UTC)
- Expired
- Aug 23, 2017, 2:45 AM EDT
- In force
- 34 min
- Issued by
- NWS Boston/Norton, MA
County Middlesex County, MA
The radar
The Boston radar (KBOX), 42 km from the middle of the area, began a volume at 06:15 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.
The nearest sounding before it
Gray, ME (KGYX), launched 00:00Z, 6.2 hours before the alert went out and 197 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
- 808 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 1033 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 290 m²/s²
- 0-3 km storm-relative helicity
- 296 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 8.3
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boston/Norton, MA wrote its last area forecast discussion before this special weather statement went out at Aug 23, 1:57 AM EDT, 14 minutes earlier.
Area forecast discussion, Aug 23, 1:57 AM EDT, 14 minutes before
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</html>Hazardous weather outlook, Aug 23, 1:36 AM EDT, 35 minutes before
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Special weather statement, Aug 22, 9:56 PM EDT, 4 hours 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
956 PM EDT TUE AUG 22 2017
MAZ002-003-008>010-230230-
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Eastern Franklin MA-Eastern Hampshire MA-
956 PM EDT TUE AUG 22 2017
...Strong Thunderstorm in western Hampshire...Franklin and
northwestern Hampden Counties...
At 955 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Colrain to near Housatonic. Movement was
east at 45 mph.
Winds in excess of 40 mph will accompany with these storms along
with torrential downpours and possible minor localized flooding.
Locations impacted include...
Northampton, Greenfield, Deerfield, Montague, Southampton,
Sunderland, Hatfield, Northfield, Williamsburg, Huntington,
Bernardston, Buckland, Conway, Shelburne, Erving, Russell, Ashfield,
Colrain, Westhampton and Gill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when these storms approach. Winds may be strong enough to
produce minor damage, such as a few downed branches.
Do not drive through flooded roads or underpasses. Avoid low lying
areas near small streams.
&&
LAT...LON 4239 7301 4265 7295 4274 7284 4272 7233
4221 7283 4220 7302 4231 7300 4231 7303
4233 7306 4238 7307
TIME...MOT...LOC 0155Z 259DEG 60KT 4276 7277 4223 7343
NoceraSpecial weather statement, Aug 22, 11:09 PM EDT, 3 hours 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
1109 PM EDT TUE AUG 22 2017
MAZ003-004-009>011-026-230415-
Northwest Middlesex County MA-Western Hampden MA-Eastern Hampden MA-
Northern Worcester MA-Eastern Franklin MA-Eastern Hampshire MA-
1109 PM EDT TUE AUG 22 2017
...Strong Thunderstorm in northwestern Worcester...southeastern
Hampshire...northwestern Middlesex...southeastern Franklin and
central Hampden Counties...
At 1108 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Royalston to Easthampton. Movement was east at
35 mph.
Wind gusts up to 50 mph will accompany with these storms along with
torrential downpours and minor localized flooding possible.
Locations impacted include...
Chicopee, Fitchburg, Holyoke, Amherst, Northampton, Orange, Ludlow,
Gardner, South Hadley, Easthampton, Belchertown, Palmer, Athol,
Winchendon, Ware, Townsend, Templeton, Rutland, Westminster and
Granby.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when these storms approach. Winds may be strong enough to
produce minor damage, such as a few downed branches.
Do not drive through flooded roads or underpasses. Avoid low lying
areas near small streams.
&&
LAT...LON 4270 7170 4221 7223 4220 7283 4269 7221
4272 7212
TIME...MOT...LOC 0308Z 250DEG 30KT 4267 7219 4228 7267
NoceraSpecial weather statement, Aug 22, 11:47 PM EDT, 2 hours 24 minutes before
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</html>Special weather statement, Aug 23, 2:11 AM EDT, 0 minutes before
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</html>The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 9:56 PM EDT | Special Weather Statement | BOX | Franklin | 34 min |
| Aug 22, 10:08 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire | 55 min |
| Aug 22, 11:09 PM EDT | Special Weather Statement | BOX | Franklin | 66 min |
| Aug 22, 11:33 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Middlesex, Worcester | 57 min |
| Aug 22, 11:47 PM EDT | Special Weather Statement | BOX | Hampden | 43 min |
| Aug 23, 12:40 AM EDT | Special Weather Statement | BOX | Middlesex | 35 min |
| Aug 23, 12:13 AM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 19 min |
Nearby
Special Weather Statements in Massachusetts, 2017Every special weather statement in 2017
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.