Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 101, NWS Boston/Norton, MA

August 7, 2014Barnstable County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 7, 2014, 5:10 PM EDT for Barnstable County, Massachusetts. It was in force for 50 min. 5 reports 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: Aug 7, 2014, 5:10 PM EDT (21:10 UTC)
Expired: Aug 7, 2014, 6:00 PM EDT
In force: 50 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Barnstable County, MA

The radar

The Boston radar (KBOX), 87 km from the middle of the area, began a volume at 21:11 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
Aug 7, 5:24 PM EDT	HAIL 0.75	Dennis, MA
Aug 7, 5:25 PM EDT	HAIL 0.75	West Dennis, MA
Aug 7, 5:25 PM EDT	HAIL 0.75	Yarmouth, MA
Aug 7, 5:29 PM EDT	HAIL 0.75	West Harwich, MA	DIME SIZE HAIL
Aug 7, 5:35 PM EDT	HAIL 1	Harwich, MA	QUARTER SIZE HAIL IN HARWICHPORT

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, 9.2 hours before the alert went out and 16 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: 15 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 1333 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

715 
WUUS51 KBOX 072110
SVRBOX
MAC001-072200-
/O.NEW.KBOX.SV.W.0101.140807T2110Z-140807T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
510 PM EDT THU AUG 7 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

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

* UNTIL 600 PM EDT

* AT 510 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED OVER
  YARMOUTH...OR 7 MILES EAST OF BARNSTABLE...AND WAS MOVING SOUTHEAST
  AT 20 MPH.

* SOME LOCATIONS IMPACTED INCLUDE...
  BARNSTABLE...BREWSTER...YARMOUTH...SANDWICH...DENNIS...HARWICH...
  CHATHAM AND HYANNIS.

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 4155 6999 4154 7000 4154 7001 4165 6998
      4166 6999 4166 7019 4163 7024 4165 7026
      4162 7032 4163 7037 4175 7048 4172 7027
      4172 7034 4171 7026 4175 7019 4176 7012
      4165 6997
TIME...MOT...LOC 2110Z 324DEG 19KT 4169 7022 
$$

FRANK

2 follow-up statements

357 
WWUS51 KBOX 072131
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
531 PM EDT THU AUG 7 2014

MAC001-072200-
/O.CON.KBOX.SV.W.0101.000000T0000Z-140807T2200Z/
BARNSTABLE MA-
531 PM EDT THU AUG 7 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHEASTERN BARNSTABLE COUNTY...

AT 530 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED OVER
HARWICH...OR NEAR BREWSTER...MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
BARNSTABLE...BREWSTER...YARMOUTH...DENNIS...HARWICH AND CHATHAM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND DESTRUCTIVE HAIL. GO
INSIDE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS. DRIVERS SHOULD EXPECT POOR VISIBILITY AND AVOID FLOODED
ROADS.

&&

LAT...LON 4155 7000 4154 7000 4154 7001 4158 6999
      4166 7004 4166 7019 4163 7024 4166 7028
      4172 7027 4168 7027 4171 7026 4175 7019
      4176 7012 4166 6998 4163 6997
TIME...MOT...LOC 2130Z 318DEG 18KT 4167 7010 

$$

FRANK

439 
WWUS51 KBOX 072152
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
552 PM EDT THU AUG 7 2014

MAC001-072200-
/O.CON.KBOX.SV.W.0101.000000T0000Z-140807T2200Z/
BARNSTABLE MA-
552 PM EDT THU AUG 7 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHEASTERN BARNSTABLE COUNTY...

AT 551 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR
CHATHAM...OR 12 MILES SOUTH OF BREWSTER...MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
HARWICH AND CHATHAM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND DESTRUCTIVE HAIL. GO
INSIDE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS. DRIVERS SHOULD EXPECT POOR VISIBILITY AND AVOID FLOODED
ROADS.

&&

LAT...LON 4155 7000 4154 7000 4154 7001 4159 6999
      4166 7004 4166 7011 4168 7007 4166 6998
      4163 6997
TIME...MOT...LOC 2151Z 324DEG 19KT 4158 7001 

$$

FRANK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 1:12 PM EDT	Special Weather Statement	BOX	Suffolk	48 min
Aug 7, 1:21 PM EDT	Special Weather Statement	BOX	Worcester	39 min
Aug 7, 1:26 PM EDT	Special Weather Statement	BOX	Plymouth	49 min
Aug 7, 1:32 PM EDT	Special Weather Statement	BOX	Worcester	43 min
Aug 7, 1:40 PM EDT	Special Weather Statement	BOX	Suffolk	35 min
Aug 7, 1:51 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Plymouth	24 min
Aug 7, 1:52 PM EDT	Special Marine Warning	BOX		23 min
Aug 7, 1:58 PM EDT	Special Marine Warning	BOX		47 min
Aug 7, 2:10 PM EDT	Special Marine Warning	BOX		35 min
Aug 7, 2:14 PM EDT	Severe Thunderstorm Warning	BOX	Plymouth	22 min
Aug 7, 2:22 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Plymouth	27 min
Aug 7, 2:28 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex, Worcester	47 min
Aug 7, 2:33 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Worcester	42 min
Aug 7, 2:39 PM EDT	Special Marine Warning	BOX		51 min
Aug 7, 2:48 PM EDT	Special Marine Warning	BOX		42 min
Aug 7, 2:58 PM EDT	Special Weather Statement	BOX	Barnstable	47 min
Aug 7, 3:11 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	28 min
Aug 7, 3:13 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Norfolk, Plymouth	47 min
Aug 7, 3:20 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable	40 min
Aug 7, 3:39 PM EDT	Special Marine Warning	BOX		51 min
Aug 7, 3:46 PM EDT	Special Weather Statement	BOX	Essex	44 min
Aug 7, 3:48 PM EDT	Special Marine Warning	BOX		42 min
Aug 7, 3:52 PM EDT	Areal Flood Advisory	BOX	Plymouth	53 min
Aug 7, 3:59 PM EDT	Special Marine Warning	BOX		46 min
Aug 7, 4:00 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Plymouth	45 min
Aug 7, 4:10 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Worcester	50 min
Aug 7, 4:14 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Plymouth	46 min
Aug 7, 4:24 PM EDT	Special Marine Warning	BOX		66 min
Aug 7, 4:26 PM EDT	Special Marine Warning	BOX		64 min
Aug 7, 4:37 PM EDT	Special Marine Warning	BOX		38 min
Aug 7, 4:37 PM EDT	Severe Thunderstorm Warning	BOX	Hampden	38 min
Aug 7, 4:39 PM EDT	Special Weather Statement	BOX	Barnstable	51 min
Aug 7, 4:56 PM EDT	Special Weather Statement	BOX	Essex	49 min
Aug 7, 4:58 PM EDT	Special Weather Statement	BOX	Worcester	47 min
Aug 7, 5:07 PM EDT	Special Weather Statement	BOX	Barnstable	38 min
Aug 7, 5:12 PM EDT	Special Marine Warning	BOX		63 min
Aug 7, 5:14 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	31 min
Aug 7, 5:15 PM EDT	Special Marine Warning	BOX		45 min
Aug 7, 5:21 PM EDT	Areal Flood Advisory	BOX	Barnstable	54 min
Aug 7, 5:29 PM EDT	Special Marine Warning	BOX		46 min
Aug 7, 5:29 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	25 min
Aug 7, 5:59 PM EDT	Special Marine Warning	BOX		61 min
Aug 7, 6:04 PM EDT	Special Marine Warning	BOX		26 min
Aug 7, 6:07 PM EDT	Special Weather Statement	BOX	Barnstable	53 min
Aug 7, 6:12 PM EDT	Special Weather Statement	BOX	Dukes	48 min
Aug 7, 6:25 PM EDT	Special Weather Statement	BOX	Suffolk	50 min
Aug 7, 6:27 PM EDT	Special Marine Warning	BOX		63 min
Aug 7, 6:37 PM EDT	Special Marine Warning	BOX		38 min
Aug 7, 6:49 PM EDT	Special Marine Warning	BOX		41 min
Aug 7, 7:03 PM EDT	Special Marine Warning	BOX		42 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.