Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 97, NWS Boston/Norton, MA

August 2, 2011Barnstable County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 2, 2011, 7:13 PM EDT for Barnstable County, Massachusetts. It was in force for 20 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: Aug 2, 2011, 7:13 PM EDT (23:13 UTC)
Expired: Aug 2, 2011, 7:33 PM EDT
In force: 20 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Barnstable County, MA

The radar

The Boston radar (KBOX), 74 km from the middle of the area, began a volume at 23:13 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 2, 7:23 PM EDT	HAIL 1	Mashpee, MA

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, 11.2 hours before the alert went out and 32 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: 252 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 1579 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 165 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.

648 
WUUS51 KBOX 022313
SVRBOX
MAC001-022345-
/O.NEW.KBOX.SV.W.0097.110802T2313Z-110802T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
713 PM EDT TUE AUG 2 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BARNSTABLE COUNTY IN SOUTHEAST MASSACHUSETTS...
  THIS INCLUDES THE CITY OF BARNSTABLE...

* UNTIL 745 PM EDT

* AT 708 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR MASHPEE...OR 9 MILES WEST OF BARNSTABLE...
  AND WAS MOVING SOUTHEAST AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...HYANNIS.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL
AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW...
INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER
TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID
FLOODED ROADS.

&&

LAT...LON 4165 7018 4162 7024 4160 7026 4163 7028
      4162 7032 4163 7035 4160 7037 4160 7044
      4156 7047 4164 7060 4177 7048 4175 7038
TIME...MOT...LOC 2313Z 306DEG 19KT 4166 7043

$$

BELK

1 follow-up statement

247 
WWUS51 KBOX 022333
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
733 PM EDT TUE AUG 2 2011

MAC001-022343-
/O.CAN.KBOX.SV.W.0097.000000T0000Z-110802T2345Z/
BARNSTABLE MA-
733 PM EDT TUE AUG 2 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BARNSTABLE COUNTY IS
CANCELLED...

LAT...LON 4165 7018 4162 7024 4160 7026 4163 7028
      4162 7032 4163 7035 4160 7037 4160 7044
      4156 7047 4164 7060 4177 7048 4175 7038
TIME...MOT...LOC 2333Z 306DEG 19KT 4160 7032

$$

BELK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 8:43 AM EDT	Special Marine Warning	BOX		62 min
Aug 2, 5:16 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable	29 min
Aug 2, 5:18 PM EDT	Special Marine Warning	BOX		39 min
Aug 2, 5:26 PM EDT	Special Weather Statement	BOX	Norfolk	34 min
Aug 2, 6:16 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex, Suffolk	71 min
Aug 2, 6:23 PM EDT	Special Weather Statement	BOX	Suffolk	22 min
Aug 2, 6:43 PM EDT	Special Marine Warning	BOX		32 min
Aug 2, 6:52 PM EDT	Special Weather Statement	BOX	Barnstable	23 min
Aug 2, 7:10 PM EDT	Special Weather Statement	BOX	Barnstable	20 min
Aug 2, 7:17 PM EDT	Special Weather Statement	BOX	Bristol	43 min
Aug 2, 7:22 PM EDT	Special Marine Warning	BOX		23 min
Aug 2, 7:49 PM EDT	Special Marine Warning	BOX		26 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2011 Every severe thunderstorm warning in 2011

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.