Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 13, NWS Boston/Norton, MA

June 10, 2014Norfolk County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 10, 2014, 5:52 PM EDT for Norfolk County, Massachusetts. It was in force for 22 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 10, 2014, 5:52 PM EDT (21:52 UTC)
Expired: Jun 10, 2014, 6:14 PM EDT
In force: 22 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Norfolk County, MA

The radar

The Boston radar (KBOX), 23 km from the middle of the area, began a volume at 21:52 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

Chatham, MA (KCHH), launched 12:00Z, 9.9 hours before the alert went out and 121 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: 2 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 854 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

244 
WUUS51 KBOX 102152
SVRBOX
MAC021-102230-
/O.NEW.KBOX.SV.W.0013.140610T2152Z-140610T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
552 PM EDT TUE JUN 10 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL NORFOLK COUNTY IN EASTERN MASSACHUSETTS...

* UNTIL 630 PM EDT

* AT 551 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED OVER NORFOLK...OR NEAR
  FRANKLIN...AND WAS MOVING EAST AT 15 MPH.

* SOME LOCATIONS IMPACTED INCLUDE...
  FRANKLIN...NORWOOD...STOUGHTON...DEDHAM...WALPOLE...CANTON...
  SHARON...FOXBOROUGH...WESTWOOD...MEDWAY...MEDFIELD...NORFOLK...
  WRENTHAM...MILLIS...DOVER AND AVON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL. GO
INDOORS AND STAY AWAY FROM WINDOWS.  DRIVERS SHOULD PREPARE FOR LOW
VISIBILITY AND AVOID FLOODED ROADS.

&&

LAT...LON 4205 7140 4215 7143 4225 7119 4213 7105
TIME...MOT...LOC 2151Z 262DEG 13KT 4212 7134 
$$

FRANK

1 follow-up statement

528 
WWUS51 KBOX 102214
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
614 PM EDT TUE JUN 10 2014

MAC021-102223-
/O.CAN.KBOX.SV.W.0013.000000T0000Z-140610T2230Z/
NORFOLK MA-
614 PM EDT TUE JUN 10 2014

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NORFOLK COUNTY IS
CANCELED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED. 
THEREFORE THE WARNING HAS BEEN CANCELED.  HOWEVER...HEAVY RAIN MAY 
STILL RESULT IN BRIEF NUISANCE POOR DRAINAGE STREET FLOODING.

LAT...LON 4205 7140 4215 7143 4225 7119 4213 7105
TIME...MOT...LOC 2210Z 262DEG 13KT 4213 7123 

$$

FRANK

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 3:55 PM EDT	Special Weather Statement	BOX	Suffolk	35 min
Jun 10, 4:40 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex, Suffolk	65 min
Jun 10, 4:44 PM EDT	Special Marine Warning	BOX		61 min
Jun 10, 4:53 PM EDT	Special Weather Statement	BOX	Suffolk	22 min
Jun 10, 5:07 PM EDT	Special Weather Statement	BOX	Suffolk	23 min
Jun 10, 5:08 PM EDT	Special Weather Statement	BOX	Suffolk	22 min
Jun 10, 5:12 PM EDT	Special Marine Warning	BOX		63 min
Jun 10, 5:33 PM EDT	Special Weather Statement	BOX	Suffolk	42 min
Jun 10, 5:54 PM EDT	Areal Flood Advisory	BOX	Plymouth	66 min
Jun 10, 6:30 PM EDT	Areal Flood Advisory	BOX	Hampden	60 min
Jun 10, 6:58 PM EDT	Areal Flood Advisory	BOX	Bristol	62 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2014 Every severe thunderstorm warning in 2014

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.