Alert archive / Connecticut / Flash Flood Warnings in 2021
Flash Flood Warning 28, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Sep 1, 2021, 9:37 PM EDT for Northeastern Connecticut Planning Region, Connecticut; Worcester County, Massachusetts. It was in force for 10 hr. 15 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
- Sep 1, 2021, 9:37 PM EDT (01:37 UTC)
- Expired
- Sep 2, 2021, 8:00 AM EDT
- In force
- 10 hr
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Northeastern Connecticut Planning Region, CT, Worcester County, MA
The radar
The Boston radar (KBOX), 67 km from the middle of the area, began a volume at 01:36 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 |
|---|---|---|---|
| Sep 2, 1:55 AM EDT | FLOOD | 2 Ssw Worcester, MA | CAMBRIDGE STREET BRIDGE IS FLOODED/IMPASSABLE AND CLOSED. |
| Sep 2, 2:10 AM EDT | FLOOD | Dudley, MA | WEST MAIN STREET FLOODED AND IMPASSABLE. |
| Sep 2, 2:11 AM EDT | FLOOD | Worcester, MA | MERRICK STREET AT PELHAM STREET CLOSED DUE TO FLOODING. |
| Sep 2, 2:30 AM EDT | FLOOD | Worcester, MA | PARTS OF SOUTHBRIDGE STREET CLOSED DUE TO FLOODING ALONG WITH QUINSIGAMOND AVENUE. |
| Sep 2, 2:34 AM EDT | FLOOD | 1 Nne Webster, MA | PART OF WORCESTER ROAD IS FLOODED AND IMPASSABLE. |
| Sep 2, 2:44 AM EDT | FLOOD | 3 Nne Millbury, MA | SOUTHWEST CUTOFF AT GRAFTON STREET FLOODED AND IMPASSABLE. CAR STUCK IN THE STREET FLOODING. |
| Sep 2, 3:09 AM EDT | FLOOD | 2 N Webster, MA | ROUTE 12 AT TANNER ROAD FLOODED AND IMPASSABLE. |
| Sep 2, 3:18 AM EDT | FLOOD | 2 S Worcester, MA | CAR STUCK IN FLOODED WATERS AT THE INTERSECTION OF CAMBRIDGE STREET AND KANSAS STREET. |
| Sep 2, 6:20 AM EDT | HEAVY RAIN 6.03 | Vernon, CT | |
| Sep 2, 6:40 AM EDT | HEAVY RAIN 5.35 | Tolland, CT | |
| Sep 2, 6:48 AM EDT | HEAVY RAIN 5.1 | Douglas, MA | |
| Sep 2, 6:50 AM EDT | HEAVY RAIN 5.84 | Coventry, CT | |
| Sep 2, 7:00 AM EDT | HEAVY RAIN 5.5 | Eastford, CT | |
| Sep 2, 7:46 AM EDT | HEAVY RAIN 5.08 | Auburn, MA | |
| Sep 2, 7:55 AM EDT | FLOOD | Andover, CT | HOP RIVER OUT OF ITS BANKS IN ANDOVER, WHICH FLOODED BUNKER HILL, LONG HILL AND PARKER BRIDGE ROADS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 1.6 hours before the alert went out and 149 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
- 123 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 512 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 456 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted.
279
WGUS51 KBOX 020137
FFWBOX
CTC013-015-MAC027-020930-
/O.NEW.KBOX.FF.W.0028.210902T0137Z-210902T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boston/Norton MA
937 PM EDT Wed Sep 1 2021
The National Weather Service in Norton has issued a
* Flash Flood Warning for...
Tolland County in northern Connecticut...
Windham County in northern Connecticut...
Southeastern Worcester County in central Massachusetts...
* Until 530 AM EDT Thursday.
* At 937 PM EDT, Doppler radar indicated heavy rain across the
warned area. Between 0.5 and 1.5 inches of rain have fallen.
Additional rainfall amounts of 3 to 5 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Worcester, Manchester, Enfield, Marlborough, Shrewsbury,
Glastonbury, Vernon, Milford, Mansfield, South Windsor, Windham,
Plainfield, Westborough, Grafton, Willimantic, Killingly, Holden,
Webster, Southbridge and Ashland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4171 7224 4161 7233 4160 7241 4181 7251
4203 7251 4203 7214 4216 7213 4219 7189
4223 7186 4228 7188 4234 7179 4233 7149
4226 7151 4226 7159 4222 7160 4217 7148
4202 7150 4201 7180 4164 7179 4166 7216
FLASH FLOOD...RADAR INDICATED
$$
Frank3 follow-up statements
393
WGUS71 KBOX 020653
FFSBOX
Flash Flood Statement
National Weather Service Boston/Norton MA
253 AM EDT Thu Sep 2 2021
CTC013-015-MAC027-020930-
/O.CON.KBOX.FF.W.0028.000000T0000Z-210902T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tolland CT-Windham CT-Worcester MA-
253 AM EDT Thu Sep 2 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM EDT EARLY THIS
MORNING FOR TOLLAND, WINDHAM AND SOUTHEASTERN WORCESTER COUNTIES...
At 253 AM EDT, Doppler radar and automated rain gauges indicated
that heavy rain was falling across the warned area. Mount Hope River
at Warrenville is rising and is about to go into moderate flood.
There are also reports of considerable street flooding with
impassable roads in the Worcester and Dudley Massachusetts region.
Between 2 and 4.5 inches of rain have fallen. Additional rainfall
amounts up to 1 inch are possible in the warned area. Flash flooding
is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Radar and automated gauges.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Worcester, Manchester, Enfield, Marlborough, Shrewsbury,
Glastonbury, Vernon, Milford, Mansfield, South Windsor, Windham,
Plainfield, Westborough, Grafton, Willimantic, Killingly, Holden,
Webster, Southbridge and Ashland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4171 7224 4161 7233 4160 7241 4181 7251
4203 7251 4203 7214 4216 7213 4219 7189
4223 7186 4228 7188 4234 7179 4233 7149
4226 7151 4226 7159 4222 7160 4217 7148
4202 7150 4201 7180 4164 7179 4166 7216
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
Frank096
WGUS71 KBOX 020753
FFSBOX
Flash Flood Statement
National Weather Service Boston/Norton MA
353 AM EDT Thu Sep 2 2021
CTC013-015-MAC027-020930-
/O.CON.KBOX.FF.W.0028.000000T0000Z-210902T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tolland CT-Windham CT-Worcester MA-
353 AM EDT Thu Sep 2 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM EDT EARLY THIS
MORNING FOR TOLLAND, WINDHAM AND SOUTHEASTERN WORCESTER COUNTIES...
At 353 AM EDT, Doppler radar and automated rain gauges indicated
that heavy rain was falling across the warned area.
Mount Hope River at Warrenville is rising and is about to go into
moderate flood. There are also reports of considerable street
flooding with impassable roads across Webster and especially
Worcester. There are also cars reported to be stuck in flood waters
in Worcester.
Between 2.5 and 4.5 inches of rain have fallen. Additional rainfall
amounts up to 1 inch are possible in the warned area. Flash flooding
is ongoing.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Radar and automated gauges.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Worcester, Manchester, Enfield, Marlborough, Shrewsbury,
Glastonbury, Vernon, Milford, Mansfield, South Windsor, Windham,
Plainfield, Westborough, Grafton, Willimantic, Killingly, Holden,
Webster, Southbridge and Ashland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4171 7224 4161 7233 4160 7241 4181 7251
4203 7251 4203 7214 4216 7213 4219 7189
4223 7186 4228 7188 4234 7179 4233 7149
4226 7151 4226 7159 4222 7160 4217 7148
4202 7150 4201 7180 4164 7179 4166 7216
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
Frank605
WGUS51 KBOX 020900
FFWBOX
CTC013-015-MAC027-021200-
/O.EXT.KBOX.FF.W.0028.000000T0000Z-210902T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boston/Norton MA
500 AM EDT Thu Sep 2 2021
The National Weather Service in Norton has extended the
* Flash Flood Warning for...
Tolland County in northern Connecticut...
Windham County in northern Connecticut...
Southeastern Worcester County in central Massachusetts...
* Until 800 AM EDT.
* At 500 AM EDT, While the heavy rain has already exited the region,
widespread 3 to 5 inches of rain with localized higher amounts
fell overnight. Therefore, some roads may remain flooded and
impassable for the morning commute. This is especially true in
Worcester where significant urban flooding had occurred.
In addition, small rivers and streams continued to rise from the
runoff. This includes the Mount Hope River at Warrenville which was
in moderate flood and still rising. The Willimantic River at
Coventry was still rising and currently just below moderate flood.
HAZARD...Flash flooding caused by the earlier heavy rain.
SOURCE...Automated gauges.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Worcester, Manchester, Enfield, Marlborough, Shrewsbury,
Glastonbury, Vernon, Milford, Mansfield, South Windsor, Windham,
Plainfield, Westborough, Grafton, Willimantic, Killingly, Holden,
Webster, Southbridge and Ashland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways!
&&
LAT...LON 4171 7224 4161 7233 4160 7241 4181 7251
4203 7251 4203 7214 4216 7213 4219 7189
4223 7186 4228 7188 4234 7179 4233 7149
4226 7151 4226 7159 4222 7160 4217 7148
4202 7150 4201 7180 4164 7179 4166 7216
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
FrankThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 1:51 AM EDT | River Flood Warning | BOX | Capitol Planning Region | 26 hr |
| Sep 2, 1:51 AM EDT | River Flood Warning | BOX | Capitol Planning Region | 66 hr |
| Sep 2, 1:51 AM EDT | River Flood Warning | BOX | Capitol Planning Region | 45 hr |
| Sep 2, 7:25 AM EDT | Flash Flood Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 6 hr |
| Sep 2, 7:43 AM EDT | Areal Flood Warning | BOX | Northeastern Connecticut Planning Region | 6 hr |
| Sep 2, 8:20 AM EDT | River Flood Warning | BOX | Southeastern Connecticut Planning Region | 53 hr |
| Sep 2, 1:28 PM EDT | Areal Flood Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 6 hr |
| Sep 2, 1:42 PM EDT | Areal Flood Warning | BOX | Northeastern Connecticut Planning Region | 6 hr |
| Sep 1, 9:13 PM EDT | Flash Flood Warning | BOX | Hampden | 10 hr |
| Sep 1, 9:24 PM EDT | Special Marine Warning | BOX | 66 min | |
| Sep 1, 10:01 PM EDT | Flash Flood Warning | BOX | Essex, Middlesex, Norfolk, Suffolk | 8 hr |
| Sep 1, 10:32 PM EDT | Flash Flood Warning | BOX | Bristol, Norfolk, Plymouth | 10 hr |
| Sep 1, 10:45 PM EDT | Special Marine Warning | BOX | 45 min | |
| Sep 1, 10:57 PM EDT | Flash Flood Warning | BOX | Franklin, Hampshire, Middlesex, Worcester | 8 hr |
| Sep 1, 11:02 PM EDT | Flash Flood Warning | BOX | Essex, Middlesex | 8 hr |
| Sep 1, 11:21 PM EDT | Tornado Warning | BOX | Barnstable, Bristol, Dukes, Plymouth | 54 min |
| Sep 1, 11:24 PM EDT | Special Marine Warning | BOX | 66 min | |
| Sep 1, 11:32 PM EDT | Special Marine Warning | BOX | 58 min | |
| Sep 1, 11:32 PM EDT | Special Marine Warning | BOX | 58 min | |
| Sep 1, 11:56 PM EDT | Tornado Warning | BOX | Barnstable, Dukes | 49 min |
| Sep 2, 12:08 AM EDT | Flash Flood Warning | BOX | Barnstable, Dukes | 8 hr |
| Sep 2, 12:20 AM EDT | Special Marine Warning | BOX | 55 min | |
| Sep 2, 12:22 AM EDT | Tornado Warning | BOX | Dukes | 53 min |
| Sep 2, 12:25 AM EDT | Special Marine Warning | BOX | 65 min | |
| Sep 2, 12:45 AM EDT | Tornado Warning | BOX | Barnstable, Dukes | 60 min |
| Sep 2, 1:07 AM EDT | Special Marine Warning | BOX | 83 min | |
| Sep 2, 1:15 AM EDT | Tornado Warning | BOX | Dukes | 28 min |
| Sep 2, 1:51 AM EDT | River Flood Warning | BOX | Worcester | 31 hr |
| Sep 2, 1:56 AM EDT | Tornado Warning | BOX | Barnstable | 26 min |
| Sep 2, 2:34 AM EDT | Flash Flood Warning | BOX | Bristol, Plymouth | 6 hr |
| Sep 2, 3:42 AM EDT | River Flood Warning | BOX | Norfolk, Suffolk | 11 hr |
| Sep 2, 5:14 AM EDT | Special Marine Warning | BOX | 46 min | |
| Sep 2, 5:26 AM EDT | Flash Flood Warning | BOX | Barnstable, Bristol, Dukes, Plymouth | 3 hr |
| Sep 2, 5:30 AM EDT | River Flood Warning | BOX | Middlesex | 22 hr |
| Sep 2, 5:49 AM EDT | Special Marine Warning | BOX | 42 min | |
| Sep 2, 6:02 AM EDT | Flash Flood Warning | BOX | Essex, Middlesex, Norfolk, Suffolk | 3 hr |
| Sep 2, 6:14 AM EDT | Special Marine Warning | BOX | 25 min | |
| Sep 2, 6:50 AM EDT | Areal Flood Warning | BOX | Franklin, Hampden, Hampshire, Middlesex, Worcester | 6 hr |
| Sep 2, 7:04 AM EDT | Areal Flood Warning | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk and 1 more | 11 hr |
| Sep 2, 7:54 AM EDT | Areal Flood Warning | BOX | Barnstable, Dukes, Plymouth | 6 hr |
| Sep 2, 8:14 AM EDT | River Flood Warning | BOX | Hampden, Hampshire | 13 hr |
| Sep 2, 8:20 AM EDT | River Flood Warning | BOX | Worcester | 32 hr |
| Sep 2, 8:20 AM EDT | River Flood Warning | BOX | Middlesex, Worcester | 60 hr |
| Sep 2, 9:25 AM EDT | River Flood Warning | BOX | Bristol, Plymouth | 64 hr |
| Sep 2, 10:40 AM EDT | Small Craft Advisory | BOX | 17 hr | |
| Sep 2, 12:51 PM EDT | Areal Flood Warning | BOX | Franklin, Hampden, Hampshire, Middlesex, Norfolk, Worcester | 6 hr |
| Sep 2, 5:59 PM EDT | River Flood Warning | BOX | Essex, Middlesex | 25 hr |
Nearby
Flash Flood Warnings in Connecticut, 2021Flash Flood Warnings in Massachusetts, 2021Every flash flood warning in 2021
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.