Alert archive / Massachusetts / Special Weather Statements in 2020
Special Weather Statement, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this special weather statement at Jun 20, 2020, 4:44 PM EDT for Franklin County, Massachusetts. It was in force for 31 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
- Jun 20, 2020, 4:44 PM EDT (20:44 UTC)
- Expired
- Jun 20, 2020, 5:15 PM EDT
- In force
- 31 min
- Issued by
- NWS Boston/Norton, MA
County Franklin County, MA
The radar
The Boston radar (KBOX), 117 km from the middle of the area, began a volume at 20:44 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
Albany, NY (KALY), launched 12:00Z, 8.7 hours before the alert went out and 132 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
- 60 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 1069 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jun 20, 3:13 PM EDT, 1 hour 31 minutes earlier.
Area forecast discussion, Jun 20, 3:13 PM EDT, 1 hour 31 minutes before
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</html>Hazardous weather outlook, Jun 20, 4:22 PM EDT, 22 minutes before
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</html>In the hours before
Special weather statement, Jun 20, 12:08 PM EDT, 4 hours 36 minutes before
Special Weather Statement National Weather Service Boston/Norton MA 1208 PM EDT Sat Jun 20 2020 MAZ002-003-008-010-011-201630- Western Franklin MA-Western Hampshire MA-Eastern Hampden MA- Eastern Franklin MA-Eastern Hampshire MA- 1208 PM EDT Sat Jun 20 2020 ...A SLOW-MOVING STRONG THUNDERSTORM IN THE PIONEER VALLEY... At 1206 PM EDT, Doppler radar was tracking a slow-moving strong thunderstorm over Hatfield, or near Amherst, moving southeast at 15 mph. Pea size hail and winds in excess of 30 mph will accompany this storm, along with brief heavy downpours and cloud to ground lightning. Locations impacted include... Holyoke, Amherst, Northampton, Deerfield, South Hadley, Easthampton, Belchertown, Granby, Hadley, Sunderland, Hatfield, Williamsburg, Conway, Leverett, Shutesbury, Whately and Pelham. PRECAUTIONARY/PREPAREDNESS ACTIONS... Get indoors when this storm approaches. Winds may be strong enough to produce minor damage, such as a few downed branches. These storms may intensify and become capable of producing damage. Stay tuned for updated statements and possible warnings. && LAT...LON 4253 7258 4234 7237 4224 7263 4243 7277 TIME...MOT...LOC 1606Z 325DEG 12KT 4239 7260 Loconto
Special weather statement, Jun 20, 1:38 PM EDT, 3 hours 6 minutes before
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</html>Special weather statement, Jun 20, 4:30 PM EDT, 14 minutes before
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</html>Special weather statement, Jun 20, 4:44 PM 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 |
|---|---|---|---|---|
| Jun 20, 12:08 PM EDT | Special Weather Statement | BOX | Hampshire | 22 min |
| Jun 20, 1:38 PM EDT | Special Weather Statement | BOX | Franklin | 22 min |
| Jun 20, 4:30 PM EDT | Special Weather Statement | BOX | Hampshire | 30 min |
| Jun 20, 5:54 PM EDT | Special Weather Statement | BOX | Franklin | 21 min |
| Jun 20, 6:18 PM EDT | Special Weather Statement | BOX | Franklin | 42 min |
| Jun 20, 6:25 PM EDT | Special Weather Statement | BOX | Middlesex | 35 min |
Nearby
Special Weather Statements in Massachusetts, 2020Every special weather statement in 2020
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.