Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 39, NWS Boston/Norton, MA

July 1, 2015Barnstable County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 1, 2015, 8:49 AM EDT for Barnstable County, Massachusetts. It was in force for 26 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 1, 2015, 8:49 AM EDT (12:49 UTC)
Expired: Jul 1, 2015, 9:15 AM EDT
In force: 26 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Barnstable County, MA

The radar

The Boston radar (KBOX), 66 km from the middle of the area, began a volume at 12:50 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.

What was reported inside it

Time	Report	Where	Remark
Jul 1, 9:00 AM EDT	TSTM WND DMG	Sandwich, MA	LARGE LIMBS DOWN ON QUAKER MEETING HOUSE ROAD... RTE 6A AND RTE 130

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 0.8 hours before the alert went out and 40 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1215 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 85 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.

510 
WUUS51 KBOX 011249
SVRBOX
MAC001-011315-
/O.NEW.KBOX.SV.W.0039.150701T1249Z-150701T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
849 AM EDT WED JUL 1 2015

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN BARNSTABLE COUNTY IN SOUTHEASTERN MASSACHUSETTS...

* UNTIL 915 AM EDT

* AT 848 AM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED NEAR FALMOUTH...AND WAS MOVING NORTHEAST AT 45 MPH.

* SOME LOCATIONS IMPACTED INCLUDE...
  BARNSTABLE...FALMOUTH...YARMOUTH...SANDWICH...BOURNE...DENNIS...
  MASHPEE AND HYANNIS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND COULD PRODUCE A 
BRIEF TORNADO ANYTIME. GO INDOORS AND STAY AWAY FROM WINDOWS.  
DRIVERS SHOULD PREPARE FOR LOW VISIBILITY AND AVOID FLOODED ROADS.

WHILE NOT IMMEDIATELY LIKELY...THESE STORMS MAY PRODUCE A SHORT LIVED
TORNADO. MOVE TO A SAFE PLACE NOW IN A STURDY STRUCTURE...SUCH AS A
BASEMENT OR SMALL INTERIOR ROOM.

MINOR FLOODING CAN BE EXPECTED FROM TORRENTIAL RAINFALL. DO NOT DRIVE
THROUGH FLOODED ROADS.

&&

LAT...LON 4163 7033 4161 7039 4162 7043 4159 7045
      4159 7046 4160 7046 4157 7047 4154 7059
      4160 7065 4165 7066 4168 7062 4167 7065
      4169 7065 4180 7052 4173 7034 4172 7031
      4172 7035 4171 7033 4175 7015
TIME...MOT...LOC 1248Z 231DEG 41KT 4165 7057 
$$

MD

1 follow-up statement

788 
WWUS51 KBOX 011313
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
913 AM EDT WED JUL 1 2015

MAC001-011323-
/O.EXP.KBOX.SV.W.0039.000000T0000Z-150701T1315Z/
BARNSTABLE MA-
913 AM EDT WED JUL 1 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BARNSTABLE COUNTY
WILL EXPIRE AT 915 AM EDT...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED. 
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4163 7033 4161 7039 4162 7043 4159 7045
      4159 7046 4160 7046 4157 7047 4154 7059
      4160 7065 4165 7066 4168 7062 4167 7065
      4169 7065 4180 7052 4173 7034 4172 7031
      4172 7035 4171 7033 4175 7015
TIME...MOT...LOC 1310Z 231DEG 41KT 4165 7057 

$$

MD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 5:16 AM EDT	Special Marine Warning	BOX		59 min
Jul 1, 6:06 AM EDT	Special Weather Statement	BOX	Franklin, Hampden, Hampshire	54 min
Jul 1, 6:25 AM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire	2 hr
Jul 1, 6:41 AM EDT	Special Marine Warning	BOX		64 min
Jul 1, 6:57 AM EDT	Special Weather Statement	BOX	Worcester	63 min
Jul 1, 7:28 AM EDT	Severe Thunderstorm Warning	BOX	Bristol, Norfolk, Plymouth, Worcester	62 min
Jul 1, 7:43 AM EDT	Special Marine Warning	BOX		62 min
Jul 1, 7:56 AM EDT	Areal Flood Advisory	BOX	Bristol, Plymouth	2 hr
Jul 1, 8:19 AM EDT	Special Weather Statement	BOX	Dukes	56 min
Jul 1, 8:53 AM EDT	Tornado Warning	BOX	Barnstable	37 min
Jul 1, 8:55 AM EDT	Special Marine Warning	BOX		50 min
Jul 1, 9:16 AM EDT	Special Weather Statement	BOX	Barnstable	59 min
Jul 1, 9:34 AM EDT	Severe Thunderstorm Warning	BOX	Dukes	26 min
Jul 1, 9:44 AM EDT	Special Marine Warning	BOX		61 min
Jul 1, 11:45 AM EDT	Special Marine Warning	BOX		60 min
Jul 1, 3:31 PM EDT	Special Weather Statement	BOX	Essex	59 min
Jul 1, 3:36 PM EDT	Areal Flood Warning	BOX	Essex	114 min
Jul 1, 3:49 PM EDT	Special Marine Warning	BOX		41 min
Jul 1, 3:50 PM EDT	Severe Thunderstorm Warning	BOX	Essex	25 min
Jul 1, 3:57 PM EDT	Tornado Warning	BOX	Essex	18 min
Jul 1, 4:29 PM EDT	Special Marine Warning	BOX		46 min
Jul 1, 4:47 PM EDT	Severe Thunderstorm Warning	BOX	Essex	14 min
Jul 1, 5:01 PM EDT	Special Weather Statement	BOX	Franklin	44 min
Jul 1, 5:48 PM EDT	Special Weather Statement	BOX	Franklin, Hampden, Hampshire	57 min
Jul 1, 6:41 PM EDT	Special Weather Statement	BOX	Worcester	49 min
Jul 1, 7:04 PM EDT	Special Weather Statement	BOX	Essex	41 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2015 Every severe thunderstorm warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.