Alert archive / Massachusetts / Tornado Warnings in 2019

Tornado Warning 5, NWS Boston/Norton, MA

July 23, 2019Barnstable County, Dukes County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Jul 23, 2019, 11:13 AM EDT for Barnstable County, Dukes County, Massachusetts. It was in force for 32 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 23, 2019, 11:13 AM EDT (15:13 UTC)
Expired
Jul 23, 2019, 11:45 AM EDT
In force
32 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Barnstable County, MA, Dukes County, MA

The radar

The Boston radar (KBOX), 66 km from the middle of the area, began a volume at 15:15 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
Jul 23, 11:30 AM EDTTSTM WND DMGVineyard Haven, MATREE AND WIRES DOWN ON CALIFORNIA AVENUE AT HUDSON AVENUE.

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, 3.2 hours before the alert went out and 60 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 2019-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 15 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 2019-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.19395878Sfc1 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
15 J/kg
Mixed-layer CIN
-248 J/kg
Mixed-layer LCL
794 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

162 
WFUS51 KBOX 231513
TORBOX
MAC001-007-231545-
/O.NEW.KBOX.TO.W.0005.190723T1513Z-190723T1545Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
1113 AM EDT Tue Jul 23 2019

The National Weather Service in Boston/Norton has issued a

* Tornado Warning for...
  Northeastern Dukes County in southeastern Massachusetts...
  Southwestern Barnstable County in southeastern Massachusetts...

* Until 1145 AM EDT.
    
* At 1113 AM EDT, a severe thunderstorm capable of producing a
  tornado was located near Gosnold, or 7 miles west of Tisbury,
  moving northeast at 35 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Tisbury around 1125 AM EDT.
  Oak Bluffs around 1130 AM EDT.
  Mashpee around 1145 AM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4143 7072 4146 7068 4148 7070 4143 7081
      4147 7083 4165 7050 4157 7044 4155 7047
      4154 7059 4148 7069 4147 7067 4149 7060
      4148 7055 4145 7054 4139 7076
TIME...MOT...LOC 1513Z 242DEG 31KT 4145 7075 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

KJC
1 follow-up statement
916 
WWUS51 KBOX 231532
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
1132 AM EDT Tue Jul 23 2019

MAC007-231541-
/O.CAN.KBOX.TO.W.0005.000000T0000Z-190723T1545Z/
Dukes MA-
1132 AM EDT Tue Jul 23 2019

...THE TORNADO WARNING FOR NORTHEASTERN DUKES COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 4165 7050 4157 7044 4156 7045 4155 7047
      4154 7059 4150 7066
TIME...MOT...LOC 1531Z 242DEG 31KT 4153 7056 

$$

MAC001-231545-
/O.CON.KBOX.TO.W.0005.000000T0000Z-190723T1545Z/
Barnstable MA-
1132 AM EDT Tue Jul 23 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT FOR SOUTHERN
BARNSTABLE COUNTY...
    
At 1131 AM EDT, a severe thunderstorm capable of producing a tornado
was located near Oak Bluffs, moving northeast at 35 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Mashpee around 1145 AM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4165 7050 4157 7044 4156 7045 4155 7047
      4154 7059 4150 7066
TIME...MOT...LOC 1531Z 242DEG 31KT 4153 7056 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

KJC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 8:09 PM EDTSpecial Marine WarningBOX96 min
Jul 22, 8:31 PM EDTAreal Flood WarningBOXBristol, Plymouth2 hr
Jul 22, 8:40 PM EDTSevere Thunderstorm WarningBOXBristol65 min
Jul 22, 9:03 PM EDTAreal Flood WarningBOXBristol, Plymouth91 min
Jul 22, 9:12 PM EDTSpecial Marine WarningBOX63 min
Jul 22, 9:33 PM EDTSevere Thunderstorm WarningBOXBarnstable, Bristol, Dukes, Plymouth35 min
Jul 22, 9:36 PM EDTSpecial Marine WarningBOX54 min
Jul 22, 9:55 PM EDTTornado WarningBOXBarnstable24 min
Jul 22, 10:17 PM EDTSevere Thunderstorm WarningBOXBarnstable26 min
Jul 22, 10:21 PM EDTTornado WarningBOXBarnstable12 min
Jul 22, 10:23 PM EDTSpecial Marine WarningBOX52 min
Jul 23, 3:27 AM EDTFlash Flood WatchBOXBarnstable, Bristol, Dukes, Nantucket, Norfolk, Plymouth10 hr
Jul 23, 5:06 AM EDTSpecial Marine WarningBOX24 min
Jul 23, 5:59 AM EDTSpecial Marine WarningBOX46 min
Jul 23, 6:29 AM EDTSpecial Marine WarningBOX30 min
Jul 23, 9:45 AM EDTSpecial Marine WarningBOX60 min
Jul 23, 10:00 AM EDTSpecial Marine WarningBOX45 min
Jul 23, 10:39 AM EDTSpecial Marine WarningBOX51 min
Jul 23, 10:45 AM EDTSevere Thunderstorm WarningBOXBarnstable, Dukes45 min
Jul 23, 11:26 AM EDTSpecial Marine WarningBOX34 min
Jul 23, 11:39 AM EDTTornado WarningBOXBarnstable36 min
Jul 23, 11:44 AM EDTSpecial Marine WarningBOX31 min
Jul 23, 12:12 PM EDTTornado Warning Tornado observedBOXBarnstable21 min
Jul 23, 12:16 PM EDTSpecial Marine WarningBOX29 min
Jul 23, 12:43 PM EDTSpecial Marine WarningBOX32 min

Nearby

Tornado Warnings in Massachusetts, 2019Every tornado warning in 2019Tornadoes in 2019

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.