Alert archive / Connecticut / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 8, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 15, 2018, 4:42 PM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut. It was in force for 63 min. 21 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
- May 15, 2018, 4:42 PM EDT (20:42 UTC)
- Expired
- May 15, 2018, 5:45 PM EDT
- In force
- 63 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT
The radar
The Brookhaven radar (KOKX), 101 km from the middle of the area, began a volume at 20:42 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 |
|---|---|---|---|
| May 15, 4:45 PM EDT | TSTM WND DMG | Bloomfield, CT | TREES DOWN ON DUNCASTER AND HOPKINS ROAD |
| May 15, 4:45 PM EDT | TSTM WND DMG | Bloomfield, CT | TREES DOWN ON DUNCASTER ROAD AND HOSKINS ROAD |
| May 15, 4:45 PM EDT | TSTM WND DMG | Simsbury, CT | TREES DOWN ON OLD FARMS ROAD NEAR TOLLGATE LANE, HOLCOMB ROAD AT CARDINAL ROAD, BARNDOOR HILLS ROAD AND FIRETOWN ROAD, AND TREE DOWN ACROSS RICHARD ROAD |
| May 15, 4:45 PM EDT | TSTM WND DMG | Union, CT | TREE AND WIRES DOWN ON BUCKLEY HIGHWAY |
| May 15, 5:00 PM EDT | HAIL 1 | Windsor, CT | TRAINED SPOTTER |
| May 15, 5:00 PM EDT | HAIL 1 | Windsor, CT | |
| May 15, 5:04 PM EDT | HAIL 0.88 | South Windsor, CT | |
| May 15, 5:15 PM EDT | TSTM WND DMG | Bolton, CT | PRIMARY WIRES DOWN BLOCKING ROUTE 44 BETWEEN HOWARD ROAD AND VERNON ROAD |
| May 15, 5:17 PM EDT | HAIL 0.75 | Farmington, CT | ROUTE 4 AT I-84 |
| May 15, 5:23 PM EDT | TSTM WND DMG | Southington, CT | TREE DOWN INTO A HOUSE ON MARION AVENUE, LARGE TREE DOWN ON SOUTH END ROAD IN PLANTSVILLE SECTION |
| May 15, 5:23 PM EDT | TSTM WND DMG | Southington, CT | TREE DOWN ON HOUSE ON MARION AVE, AND ON WILBUR STREET AND MILLDALE AVE. LARGE TREE DOWN ON SOUTH END ROAD IN PLANTSVILLE SECTION |
| May 15, 5:30 PM EDT | TSTM WND DMG | Bolton, CT | TREE AND WIRES DOWN ON OLD COLCHESTER ROAD NEAR THE COLCHESTER LINE |
| May 15, 5:35 PM EDT | TSTM WND DMG | Ashford, CT | TREES AND WIRES DOWN ON SNOW LANE AT KENNERSON RESERVOIR ROAD |
| May 15, 5:35 PM EDT | TSTM WND DMG | Ashford, CT | WIRES DOWN AND BURNING ON KENNERSON RESERVOIR ROAD AND SNOW LANE |
| May 15, 5:35 PM EDT | TSTM WND DMG | Mansfield, CT | TREE AND WIRES DOWN ON BIRCHWOOD HEIGHTS ROAD |
| May 15, 5:40 PM EDT | TSTM WND DMG | Pomfret, CT | TREES DOWN ON RTE 244 AT RTE 97 INTERSECTION |
| May 15, 5:40 PM EDT | TSTM WND DMG | Woodstock, CT | SIDING BLOWN OFF WOODSTOCK ACADEMY SCHOOL ON ACADEMY ROAD |
| May 15, 5:40 PM EDT | TSTM WND DMG | Woodstock, CT | SIDING BLOWN OFF WOODSTOCK ACADEMY SCHOOL WINDOW |
| May 15, 5:45 PM EDT | TSTM WND DMG | Abington, CT | TREES AND WIRES DOWN ON ROUTE 97 |
| May 15, 5:45 PM EDT | TSTM WND DMG | Abington, CT | TREES AND WIRES DOWN ON RTE 97 |
| May 15, 5:45 PM EDT | TSTM WND DMG | Pomfret, CT | TREES AND WIRES DOWN AT ROUTE 244 AND ROUTE 97 INTERSECTION |
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 |
|---|---|---|---|
| May 15, 2:23 PM EDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.7 hours before the alert went out and 101 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 909 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
333
WUUS51 KBOX 152042
SVRBOX
CTC003-013-015-152145-
/O.NEW.KBOX.SV.W.0008.180515T2042Z-180515T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
442 PM EDT TUE MAY 15 2018
The National Weather Service in Boston/Norton has issued a
* Severe Thunderstorm Warning for...
Northern Windham County in northern Connecticut...
Tolland County in northern Connecticut...
Hartford County in northern Connecticut...
* Until 545 PM EDT.
* At 442 PM EDT, severe thunderstorms were located along a line
extending from Suffield to near Torrington to Pawling, moving east
at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is possible. Expect damage to
trees and power lines.
* Locations impacted include...
Hartford, New Britain, West Hartford, Bristol, Manchester, East
Hartford, Enfield, Southington, Glastonbury, Newington, Vernon,
Windsor, Wethersfield, Mansfield, South Windsor, Farmington,
Windham, Wolcott, Colchester and Cheshire.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A Tornado Watch remains in effect until 900 PM EDT for northern
Connecticut...and western and central Massachusetts.
LAT...LON 4181 7295 4197 7289 4197 7292 4203 7282
4200 7281 4203 7275 4202 7180 4170 7221
4171 7224 4169 7227 4160 7234 4158 7246
4165 7251 4164 7266 4157 7285 4155 7285
4156 7295 4163 7293 4164 7299 4180 7302
TIME...MOT...LOC 2042Z 271DEG 37KT 4200 7269 4180 7314 4155 7360
HAIL...1.00IN
WIND...60MPH
$$
Sipprell2 follow-up statements
479
WWUS51 KBOX 152107
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
507 PM EDT TUE MAY 15 2018
CTC003-013-015-152145-
/O.CON.KBOX.SV.W.0008.000000T0000Z-180515T2145Z/
Windham CT-Tolland CT-Hartford CT-
507 PM EDT TUE MAY 15 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHERN WINDHAM...TOLLAND AND HARTFORD COUNTIES...
At 506 PM EDT, severe thunderstorms were located along a line
extending from near Stafford to Avon to near Thomaston to Seymour to
Bridgeport--Stamford, moving east at 65 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters.
IMPACT...Hail damage to vehicles is possible. Expect damage to trees
and power lines.
Locations impacted include...
Hartford, New Britain, West Hartford, Bristol, Manchester, East
Hartford, Enfield, Southington, Glastonbury, Newington, Vernon,
Windsor, Wethersfield, Mansfield, South Windsor, Farmington, Windham,
Wolcott, Colchester and Cheshire.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A Tornado Watch remains in effect until 900 PM EDT for northern
Connecticut...and central Massachusetts.
LAT...LON 4181 7295 4203 7252 4202 7180 4170 7221
4171 7224 4169 7227 4160 7234 4158 7246
4165 7251 4164 7266 4157 7285 4155 7285
4156 7295 4163 7293 4164 7299 4180 7302
TIME...MOT...LOC 2106Z 274DEG 58KT 4198 7238 4178 7283 4163 7304 4140
7307 4123 7332
HAIL...1.00IN
WIND...60MPH
$$
Sipprell892
WWUS51 KBOX 152139
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
539 PM EDT TUE MAY 15 2018
CTC003-013-015-152148-
/O.EXP.KBOX.SV.W.0008.000000T0000Z-180515T2145Z/
Windham CT-Tolland CT-Hartford CT-
539 PM EDT TUE MAY 15 2018
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WINDHAM...TOLLAND AND
HARTFORD COUNTIES WILL EXPIRE AT 545 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
A Tornado Watch remains in effect until 900 PM EDT for northern
Connecticut...and central Massachusetts.
LAT...LON 4181 7295 4203 7252 4202 7180 4170 7221
4171 7224 4169 7227 4160 7234 4158 7246
4165 7251 4164 7266 4157 7285 4155 7285
4156 7295 4163 7293 4164 7299 4180 7302
TIME...MOT...LOC 2138Z 271DEG 37KT 4197 7194 4177 7239 4162 7260 4139
7263 4122 7289
$$
SipprellThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 3:06 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 54 min |
| May 15, 3:36 PM EDT | Tornado Warning | BOX | Capitol Planning Region | 24 min |
| May 15, 3:46 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 59 min |
| May 15, 4:02 PM EDT | Tornado Warning | BOX | Capitol Planning Region | 28 min |
| May 15, 5:31 PM EDT | Special Weather Statement | BOX | 59 min | |
| May 15, 5:48 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 27 min |
Nearby
Severe Thunderstorm Warnings in Connecticut, 2018Every severe thunderstorm warning in 2018
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.