Alert archive / Massachusetts / Tornado Warnings in 2019

Tornado Warning 7, NWS Boston/Norton, MA

July 23, 2019Barnstable County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Jul 23, 2019, 12:12 PM EDT for Barnstable County, Massachusetts. It was in force for 21 min. 9 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
Jul 23, 2019, 12:12 PM EDT (16:12 UTC)
Expired
Jul 23, 2019, 12:33 PM EDT
In force
21 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Tornado
Observed
Hail
0.0 in

County Barnstable County, MA

The radar

The Boston radar (KBOX), 97 km from the middle of the area, began a volume at 16:11 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

TimeReportWhereRemark
Jul 23, 12:14 PM EDTTSTM WND DMGBrewster, MALARGE TREE DOWN BLOCKING STONY BROOK ROAD. TREE AND POWER LINES DOWN ON RUN HILL ROAD.
Jul 23, 12:15 PM EDTTSTM WND DMGHarwich, MATREES, UTILITY POLES AND WIRES DOWN ON SOUTH STREET AT SISSON ROAD. WIRES DOWN ON ROUTE 137 AT ROUTE 39. TREE DOWN ON ROUTE 39.
Jul 23, 12:15 PM EDTTSTM WND GST 82Chatham, MA
Jul 23, 12:15 PM EDTTSTM WND GST 85Chatham, MA
Jul 23, 12:19 PM EDTTSTM WND GST 84Chatham, MA
Jul 23, 12:20 PM EDTTSTM WND DMGChatham, MA2 UTILITY POLES LEANING ON MORRIS ISLAND CAUSEWAY WITH 1 SNAPPED IN HALF AND WIRES HANGING LOW TO THE GROUND.
Jul 23, 12:24 PM EDTTSTM WND DMGHarwich, MASEVERAL DOZEN TREES DOWN ON ROUTE 28.
Jul 23, 12:30 PM EDTTSTM WND DMGChatham, MAMULTIPLE TREES DOWN.
Jul 23, 12:30 PM EDTTSTM WND DMGOrleans, MATREES DOWN WITH ONE BLOCKING ROUTE 28 SOUTHBOUND. WIRES DOWN ON MAIN STREET. LARGE TREE DOWN ON QUANSET ROAD BY RIDGEWOOD MOTEL. WIRES DOWN ON KAREN LANE. TREE DOWN ON WIRES ON BLUE HERON WAY.

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, 4.2 hours before the alert went out and 5 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.

731 
WFUS51 KBOX 231612
TORBOX
MAC001-231645-
/O.NEW.KBOX.TO.W.0007.190723T1612Z-190723T1645Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
1212 PM EDT Tue Jul 23 2019

The National Weather Service in Boston/Norton has issued a

* Tornado Warning for...
  East central Barnstable County in southeastern Massachusetts...

* Until 1245 PM EDT.
    
* At 1211 PM EDT, a tornado producing storm was located over Harwich,
  or near Brewster, moving northeast at 35 mph.

* A wind gust to 90 mph was observed at Kalmus.

  HAZARD...Damaging tornado.

  SOURCE...Radar confirmed tornado.

  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 tornadic storm will be near...
  Brewster around 1215 PM EDT.
  Orleans and Eastham around 1225 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4167 6993 4165 7002 4164 7014 4169 7020
      4183 6993
TIME...MOT...LOC 1611Z 239DEG 29KT 4170 7009 

TORNADO...OBSERVED
HAIL...0.00IN

$$

KJC
1 follow-up statement
231 
WWUS51 KBOX 231633
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
1233 PM EDT Tue Jul 23 2019

MAC001-231643-
/O.CAN.KBOX.TO.W.0007.000000T0000Z-190723T1645Z/
Barnstable MA-
1233 PM EDT Tue Jul 23 2019

...THE TORNADO WARNING FOR EAST CENTRAL BARNSTABLE COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 4167 6993 4165 7002 4164 7014 4169 7020
      4183 6993
TIME...MOT...LOC 1631Z 239DEG 29KT 4179 6989 

$$

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, 11:13 AM EDTTornado WarningBOXBarnstable, Dukes32 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, 12:16 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.