Alert archive / Massachusetts / Special Weather Statements in 2018

Special Weather Statement, NWS Boston/Norton, MA

July 26, 2018Norfolk County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Jul 26, 2018, 4:20 PM EDT for Norfolk County, Massachusetts. It was in force for 40 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: Jul 26, 2018, 4:20 PM EDT (20:20 UTC)
Expired: Jul 26, 2018, 5:00 PM EDT
In force: 40 min
Issued by: NWS Boston/Norton, MA

County Norfolk County, MA

The radar

The Boston radar (KBOX), 53 km from the middle of the area, began a volume at 20:20 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 12:00Z, 8.3 hours before the alert went out and 177 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: 7 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 466 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Jul 26, 2:23 PM EDT, 1 hour 57 minutes earlier.

Area forecast discussion, Jul 26, 2:23 PM EDT, 1 hour 57 minutes before

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Hazardous weather outlook, Jul 26, 4:10 AM EDT, 12 hours 10 minutes before

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In the hours before

Special weather statement, Jul 26, 1:24 PM EDT, 2 hours 56 minutes before

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Special weather statement, Jul 26, 1:30 PM EDT, 2 hours 50 minutes before

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Special weather statement, Jul 26, 2:35 PM EDT, 1 hour 45 minutes before

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Special weather statement, Jul 26, 2:43 PM EDT, 1 hour 37 minutes before

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Special weather statement, Jul 26, 3:35 PM EDT, 45 minutes before

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Special weather statement, Jul 26, 4:20 PM EDT, 0 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 25, 10:10 PM EDT	Areal Flood Warning	BOX	Franklin, Hampden, Hampshire	3 hr
Jul 26, 2:32 AM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	28 min
Jul 26, 3:00 AM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	30 min
Jul 26, 3:45 AM EDT	Special Weather Statement	BOX	Middlesex	45 min
Jul 26, 1:24 PM EDT	Special Weather Statement	BOX	Worcester	51 min
Jul 26, 1:30 PM EDT	Special Weather Statement	BOX	Worcester	45 min
Jul 26, 2:35 PM EDT	Special Weather Statement	BOX	Worcester	55 min
Jul 26, 2:43 PM EDT	Special Weather Statement	BOX	Middlesex	62 min
Jul 26, 3:35 PM EDT	Special Weather Statement	BOX	Norfolk, Suffolk	55 min
Jul 26, 5:32 PM EDT	Special Weather Statement	BOX	Barnstable, Bristol, Plymouth	88 min
Jul 25, 10:13 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	2 hr

Nearby

Special Weather Statements in Massachusetts, 2018 Every special weather statement in 2018

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.