Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 13, NWS Boston/Norton, MA

April 12, 2008Barnstable County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Apr 12, 2008, 8:03 AM EDT for Barnstable County, Massachusetts. It was in force for 25 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
Apr 12, 2008, 8:03 AM EDT (12:03 UTC)
Expired
Apr 12, 2008, 8:28 AM EDT
In force
25 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon

County Barnstable County, MA

The radar

The Boston radar (KBOX), 85 km from the middle of the area, began a volume at 12:04 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

TimeReportWhereRemark
Apr 12, 8:20 AM EDTHAIL 0.75Orleans, MADIME SIZE HAIL NEAR ROCK HARBOR.

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, 0.1 hours before the alert went out and 18 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-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2008-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2008-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
7 J/kg
Mixed-layer CIN
-347 J/kg
Mixed-layer LCL
664 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
294 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBOX 121203
SVRBOX
MAC001-121245-
/O.NEW.KBOX.SV.W.0013.080412T1203Z-080412T1245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
803 AM EDT SAT APR 12 2008

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

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

* UNTIL 845 AM EDT

* AT 800 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  BARNSTABLE...AND MOVING EAST AT 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DENNIS BY 810 AM EDT...
  BREWSTER...6 MILES NORTH OF HARWICH AND 9 MILES NORTH OF CHATHAM BY
  815 AM EDT...
  ORLEANS...EASTHAM AND 9 MILES SOUTH OF WELLFLEET BY 820 AM EDT...

LAT...LON 4165 6992 4163 7018 4160 7029 4162 7035
      4158 7045 4176 7046 4174 7024 4180 7003
      4188 7003 4186 7008 4193 7011 4200 7010
      4204 7005 4182 6991
TIME...MOT...LOC 1203Z 252DEG 60KT 4173 7032

$$

FRANK
2 follow-up statements
000 
WWUS51 KBOX 121220
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
819 AM EDT SAT APR 12 2008

MAC001-121245-
/O.CON.KBOX.SV.W.0013.000000T0000Z-080412T1245Z/
BARNSTABLE MA-
819 AM EDT SAT APR 12 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 AM EDT
FOR EAST CENTRAL BARNSTABLE COUNTY...

AT 817 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ORLEANS...OR 16 MILES NORTHEAST OF BARNSTABLE...MOVING
EAST AT 60 MPH.

LAT...LON 4165 6993 4164 7008 4166 7010 4169 7004
      4177 7005 4175 7019 4181 7002 4188 7003
      4186 7008 4193 7011 4199 7011 4204 7005
      4181 6991
TIME...MOT...LOC 1219Z 252DEG 60KT 4181 6998

$$

FRANK
000 
WWUS51 KBOX 121228
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
826 AM EDT SAT APR 12 2008

MAC001-121236-
/O.CAN.KBOX.SV.W.0013.000000T0000Z-080412T1245Z/
BARNSTABLE MA-
826 AM EDT SAT APR 12 2008

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

THE THUNDERSTORM THAT PROMPTED THE ISSUANCE OF A WARNING HAS EXITED 
THE REGION.  THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN 
CANCELED.  WE RECEIVED A REPORT OF DIME SIZE HAIL IN ORLEANS AT 820 
AM.  WE ALSO RECEIVED NUMEROUS REPORTS OF HALF INCH HAIL ACROSS MANY 
LOCATIONS.

LAT...LON 4165 6993 4164 7008 4166 7010 4169 7004
      4177 7005 4175 7019 4181 7002 4188 7003
      4186 7008 4193 7011 4199 7011 4204 7005
      4181 6991
TIME...MOT...LOC 1226Z 252DEG 60KT 4185 6983

$$

FRANK

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 6:26 AM EDTSpecial Marine WarningBOX64 min
Apr 12, 7:46 AM EDTSpecial Marine WarningBOX59 min
Apr 12, 7:47 AM EDTSevere Thunderstorm WarningBOXBarnstable, Bristol, Plymouth31 min
Apr 12, 8:32 AM EDTSpecial Marine WarningBOX43 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2008Every severe thunderstorm warning in 2008

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.