Alert archive / Massachusetts / Tornado Warnings in 2019

Tornado Warning 4, NWS Boston/Norton, MA

July 22, 2019Barnstable County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Jul 22, 2019, 10:21 PM EDT for Barnstable County, Massachusetts. It was in force for 12 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 22, 2019, 10:21 PM EDT (02:21 UTC)
Expired: Jul 22, 2019, 10:33 PM EDT
In force: 12 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Barnstable County, MA

The radar

The Boston radar (KBOX), 97 km from the middle of the area, began a volume at 02:25 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.

The nearest sounding before it

Chatham, MA (KCHH), launched 00:00Z, 2.4 hours before the alert went out and 6 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: 32 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 943 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 199 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

385 
WFUS51 KBOX 230221
TORBOX
MAC001-230300-
/O.NEW.KBOX.TO.W.0004.190723T0221Z-190723T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
1021 PM EDT Mon Jul 22 2019

The National Weather Service in Boston/Norton has issued a

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

* Until 1100 PM EDT.
    
* At 1021 PM EDT, a severe thunderstorm capable of producing a
  tornado was located over Harwich, or near Brewster, moving
  northeast at 40 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...
  Orleans and Eastham around 1030 PM 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 4162 6994 4161 7000 4165 6999 4166 7001
      4164 7011 4175 7021 4180 7003 4182 7002
      4184 6993 4182 6992
TIME...MOT...LOC 0221Z 242DEG 37KT 4170 7002 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Frank

2 follow-up statements

537 
WWUS51 KBOX 230229
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
1029 PM EDT Mon Jul 22 2019

MAC001-230300-
/O.CON.KBOX.TO.W.0004.000000T0000Z-190723T0300Z/
Barnstable MA-
1029 PM EDT Mon Jul 22 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT FOR EAST
CENTRAL BARNSTABLE COUNTY...
    
At 1028 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Orleans, or 7 miles east of Brewster, moving
northeast at 40 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.  West Dennis reported a wind gust 
         to 50 mph with this storm at 10:18 pm.

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 thunderstorm will remain over mainly rural areas of
EAST CENTRAL BARNSTABLE COUNTY.

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 4162 6994 4161 7000 4165 6999 4166 7001
      4167 7002 4178 7005 4180 7003 4182 7002
      4184 6993 4182 6992
TIME...MOT...LOC 0228Z 242DEG 37KT 4173 6993 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Frank

083 
WWUS51 KBOX 230233
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
1033 PM EDT Mon Jul 22 2019

MAC001-230243-
/O.CAN.KBOX.TO.W.0004.000000T0000Z-190723T0300Z/
Barnstable MA-
1033 PM EDT Mon Jul 22 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.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 4162 6994 4161 7000 4165 6999 4166 7001
      4167 7002 4178 7005 4180 7003 4182 7002
      4184 6993 4182 6992
TIME...MOT...LOC 0231Z 242DEG 37KT 4176 6987 

$$

Frank

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 8:09 PM EDT	Special Marine Warning	BOX		96 min
Jul 22, 8:31 PM EDT	Areal Flood Warning	BOX	Bristol, Plymouth	2 hr
Jul 22, 8:40 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	65 min
Jul 22, 9:03 PM EDT	Areal Flood Warning	BOX	Bristol, Plymouth	91 min
Jul 22, 9:12 PM EDT	Special Marine Warning	BOX		63 min
Jul 22, 9:33 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Bristol, Dukes, Plymouth	35 min
Jul 22, 9:36 PM EDT	Special Marine Warning	BOX		54 min
Jul 22, 9:55 PM EDT	Tornado Warning	BOX	Barnstable	24 min
Jul 22, 10:17 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable	26 min
Jul 22, 10:23 PM EDT	Special Marine Warning	BOX		52 min
Jul 23, 3:27 AM EDT	Flash Flood Watch	BOX	Barnstable, Bristol, Dukes, Nantucket, Norfolk, Plymouth	10 hr
Jul 23, 5:06 AM EDT	Special Marine Warning	BOX		24 min
Jul 23, 5:59 AM EDT	Special Marine Warning	BOX		46 min
Jul 23, 6:29 AM EDT	Special Marine Warning	BOX		30 min
Jul 23, 9:45 AM EDT	Special Marine Warning	BOX		60 min
Jul 23, 10:00 AM EDT	Special Marine Warning	BOX		45 min
Jul 23, 10:39 AM EDT	Special Marine Warning	BOX		51 min
Jul 23, 10:45 AM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Dukes	45 min
Jul 23, 11:13 AM EDT	Tornado Warning	BOX	Barnstable, Dukes	32 min
Jul 23, 11:26 AM EDT	Special Marine Warning	BOX		34 min
Jul 23, 11:39 AM EDT	Tornado Warning	BOX	Barnstable	36 min
Jul 23, 11:44 AM EDT	Special Marine Warning	BOX		31 min
Jul 23, 12:12 PM EDT	Tornado Warning Tornado observed	BOX	Barnstable	21 min
Jul 23, 12:16 PM EDT	Special Marine Warning	BOX		29 min
Jul 23, 12:43 PM EDT	Special Marine Warning	BOX		32 min

Nearby

Tornado Warnings in Massachusetts, 2019 Every tornado warning in 2019 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.