Alert archive / Massachusetts / Tornado Warnings in 2019

Tornado Warning 8, NWS Boston/Norton, MA

August 21, 2019Essex County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Aug 21, 2019, 2:49 PM EDT for Essex County, Massachusetts. It was in force for 26 min. 2 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: Aug 21, 2019, 2:49 PM EDT (18:49 UTC)
Expired: Aug 21, 2019, 3:15 PM EDT
In force: 26 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Essex County, MA

The radar

The Boston radar (KBOX), 98 km from the middle of the area, began a volume at 18:51 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 21, 2:59 PM EDT	FUNNEL CLOUD	2 N Byfield, MA	FUNNEL CLOUD REPORTED IN WEST NEWBURY
Aug 21, 3:03 PM EDT	FUNNEL CLOUD	1 Ese Curzon Mill, MA	FUNNEL (ROPE) REPORTED IN NEWBURYPORT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 21, 1:53 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 6.8 hours before the alert went out and 130 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1665 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

290 
WFUS51 KBOX 211849
TORBOX
MAC009-211915-
/O.NEW.KBOX.TO.W.0008.190821T1849Z-190821T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
249 PM EDT Wed Aug 21 2019

The National Weather Service in Boston/Norton has issued a

* Tornado Warning for...
  Northwestern Essex County in northeastern Massachusetts...

* Until 315 PM EDT.
    
* At 248 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Groveland, or over Haverhill, moving northeast at
  30 mph.

  HAZARD...Tornado and quarter size hail.

  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...
  West Newbury around 255 PM EDT.
  Amesbury, Salisbury and Newbury around 305 PM EDT.
  Newburyport around 310 PM EDT.
  Seabrook around 315 PM EDT.

Other locations impacted by this tornadic thunderstorm include South
Hampton and Plaistow.

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 4286 7085 4287 7082 4283 7081 4281 7087
      4280 7083 4282 7082 4280 7081 4280 7078
      4279 7078 4268 7114 4277 7118 4282 7109
      4281 7107 4283 7105 4289 7093 4289 7090
TIME...MOT...LOC 1848Z 245DEG 28KT 4277 7103 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$
Field

1 follow-up statement

300 
WWUS51 KBOX 211904
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
304 PM EDT Wed Aug 21 2019

MAC009-211915-
/O.CON.KBOX.TO.W.0008.000000T0000Z-190821T1915Z/
Essex MA-
304 PM EDT Wed Aug 21 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM EDT FOR
NORTHWESTERN ESSEX COUNTY...
    
At 301 PM EDT, a severe thunderstorm capable of producing a tornado 
was located over West Newbury and Groveland, moving east at 15 mph.
A spotter in Newbury has reported a funnel cloud with this storm.

HAZARD...Tornado and quarter size hail.

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...
  Newburyport, Amesbury, Salisbury, Newbury and Seabrook around 315 
  PM EDT.

Other locations impacted by this tornadic thunderstorm include South
Hampton and Plaistow.

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 4286 7085 4287 7082 4283 7081 4281 7087
      4280 7083 4282 7082 4280 7081 4280 7078
      4279 7078 4268 7114 4277 7118 4282 7109
      4281 7107 4283 7105 4289 7093 4289 7090
TIME...MOT...LOC 1901Z 252DEG 12KT 4279 7096 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$
Field

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 3:47 AM EDT	Small Craft Advisory	BOX		46 hr
Aug 21, 4:43 AM EDT	Special Weather Statement	BOX	Hampden	77 min
Aug 21, 10:06 AM EDT	Special Weather Statement	BOX	Dukes, Nantucket	84 min
Aug 21, 10:41 AM EDT	Special Marine Warning	BOX		64 min
Aug 21, 10:45 AM EDT	Special Marine Warning	BOX		60 min
Aug 21, 2:03 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex	10 min
Aug 21, 2:37 PM EDT	Severe Thunderstorm Warning	BOX	Essex	23 min
Aug 21, 2:54 PM EDT	Special Marine Warning	BOX		66 min
Aug 21, 3:14 PM EDT	Severe Thunderstorm Warning	BOX	Essex	19 min
Aug 21, 3:51 PM EDT	Special Marine Warning	BOX		54 min
Aug 21, 3:55 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	31 min
Aug 21, 5:12 PM EDT	Special Weather Statement	BOX	Franklin	63 min
Aug 21, 6:01 PM EDT	Special Weather Statement	BOX	Franklin	44 min
Aug 21, 6:34 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	56 min
Aug 21, 7:14 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Norfolk	38 min
Aug 21, 7:46 PM EDT	Special Weather Statement	BOX	Worcester	29 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.