Alert archive / Rhode Island / Heat Advisories in 2019

Heat Advisory 4, NWS Boston/Norton, MA

July 31, 2019Bristol County, Plymouth County, Massachusetts; 4 counties in Rhode Island

NWS Boston/Norton, MA issued this heat advisory at Jul 31, 2019, 2:54 AM EDT for Bristol County, Plymouth County, Massachusetts; 4 counties in Rhode Island. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Jul 31, 2019, 2:54 AM EDT (06:54 UTC)
Expired: Jul 31, 2019, 6:00 PM EDT
In force: 15 hr
Issued by: NWS Boston/Norton, MA

Counties Bristol County, MA, Plymouth County, MA, Bristol County, RI, Kent County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 29 km from the middle of the area, began a volume at 06:59 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

Brookhaven, NY (KOKX), launched 00:00Z, 6.9 hours before the alert went out and 161 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: 634 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1459 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this heat advisory 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 heat advisory went out at Jul 31, 1:43 AM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Jul 31, 1:43 AM EDT, 1 hour 11 minutes before

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Hazardous weather outlook, Jul 30, 5:45 PM EDT, 9 hours 9 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 31, 1:02 PM EDT	Special Weather Statement	BOX	Hampden	43 min
Jul 31, 1:22 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	53 min
Jul 31, 2:02 PM EDT	Special Weather Statement	BOX	Hampden	43 min
Jul 31, 2:05 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire, Worcester	40 min
Jul 31, 2:13 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Worcester	62 min
Jul 31, 2:46 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Worcester	44 min
Jul 31, 3:03 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	42 min
Jul 31, 3:08 PM EDT	Special Weather Statement	BOX	Middlesex	37 min
Jul 31, 3:14 PM EDT	Special Marine Warning	BOX		61 min
Jul 31, 3:20 PM EDT	Special Weather Statement	BOX	Norfolk, Suffolk	25 min
Jul 31, 3:35 PM EDT	Special Weather Statement	BOX	Norfolk	55 min
Jul 31, 3:37 PM EDT	Special Weather Statement	BOX	Norfolk	53 min
Jul 31, 3:41 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Suffolk	64 min
Jul 31, 3:55 PM EDT	Special Marine Warning	BOX		65 min
Jul 31, 3:55 PM EDT	Severe Thunderstorm Warning	BOX	Essex	34 min
Jul 31, 3:58 PM EDT	Special Marine Warning	BOX		62 min
Jul 31, 4:06 PM EDT	Special Weather Statement	BOX	Middlesex	39 min
Jul 31, 4:14 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Norfolk, Plymouth, Suffolk	61 min
Jul 31, 4:24 PM EDT	Special Marine Warning	BOX		36 min

Nearby

Heat Advisories in Rhode Island, 2019 Heat Advisories in Massachusetts, 2019 Every heat advisory in 2019

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.