Alert archive / Rhode Island / Flash Flood Warnings in 2026
Flash Flood Warning 2, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Jul 21, 2026, 7:45 PM EDT for Bristol County, Newport County, Washington County, Rhode Island; Bristol County, Plymouth County, Massachusetts. It was in force for 93 min. 1 report 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 21, 2026, 7:45 PM EDT (23:45 UTC)
- Expired
- Jul 21, 2026, 9:18 PM EDT
- In force
- 93 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bristol County, MA, Plymouth County, MA, Bristol County, RI, Newport County, RI, Washington County, RI
The radar
The Boston radar (KBOX), 26 km from the middle of the area, began a volume at 23:45 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 |
|---|---|---|---|
| Jul 21, 8:30 PM EDT | FLASH FLOOD | 2 Nne New Bedford Ap, MA | In New Bedford, Acushnet Ave was flooded with water coming out of manhole covers requiring DPW assistance. |
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 12:00Z, 11.8 hours before the alert went out and 169 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
- 1211 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
801
WGUS51 KBOX 212345
FFWBOX
MAC005-023-RIC001-005-009-220245-
/O.NEW.KBOX.FF.W.0002.260721T2345Z-260722T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boston/Norton MA
745 PM EDT Tue Jul 21 2026
The National Weather Service in Norton has issued a
* Flash Flood Warning for...
Bristol County in southeastern Massachusetts...
Plymouth County in southeastern Massachusetts...
Bristol County in Rhode Island...
Newport County in Rhode Island...
East Central Washington County in Rhode Island...
* Until 1045 PM EDT.
* At 745 PM EDT, Doppler radar indicated showers and embedded
thunderstorms producing torrential rain across the warned area.
Flash flooding is ongoing or expected to begin shortly. Main area
of concern is near the south coast and especially the typically
vulnerable areas of Fall River and New Bedford.
HAZARD...Flash flooding caused by showers and embedded
thunderstorms.
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...
New Bedford, Fall River, Warwick, Plymouth, Taunton, Dartmouth,
South Kingstown, Bridgewater, North Kingstown, Marshfield,
Newport, Bristol, Marion, Middleborough, Wareham, Bourne,
Somerset, Scituate and Pembroke.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4152 7149 4170 7138 4167 7138 4167 7137
4171 7137 4172 7136 4173 7138 4175 7136
4181 7126 4219 7058 4211 7047 4190 7042
4122 7144
FLASH FLOOD...RADAR INDICATED
$$
Frank2 follow-up statements
580
WGUS71 KBOX 220106
FFSBOX
Flash Flood Statement
National Weather Service Boston/Norton MA
906 PM EDT Tue Jul 21 2026
RIC001-009-220116-
/O.CAN.KBOX.FF.W.0002.000000T0000Z-260722T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bristol RI-Washington RI-
906 PM EDT Tue Jul 21 2026
...FLASH FLOOD WARNING IS CANCELLED FOR BRISTOL AND EAST CENTRAL
WASHINGTON COUNTIES...
The heaviest rain has shifted southeast of the region...so the Flash
Flood Warning has been cancelled. Please continue to heed remaining
road closures.
&&
LAT...LON 4123 7143 4142 7121 4149 7121 4155 7119
4165 7113 4190 7098 4199 7093 4213 7068
4219 7058 4211 7047 4190 7042 4177 7062
4176 7063 4161 7086 4149 7104
$$
MAC005-023-RIC005-220245-
/O.CON.KBOX.FF.W.0002.000000T0000Z-260722T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bristol MA-Plymouth MA-Newport RI-
906 PM EDT Tue Jul 21 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT THIS
EVENING FOR SOUTHEASTERN BRISTOL, PLYMOUTH AND SOUTHEASTERN NEWPORT
COUNTIES...
At 906 PM EDT, Doppler radar indicated showers and a few embedded
thunderstorms producing heavy rain across the warned area. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by showers and a few embedded
thunderstorms.
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...
New Bedford, Fall River, Plymouth, Taunton, Dartmouth,
Bridgewater, Marshfield, Marion, Middleborough, Wareham, Bourne,
Scituate, Pembroke, Fairhaven, Tiverton, Westport, Duxbury, East
Bridgewater, Kingston and Carver.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4123 7143 4142 7121 4149 7121 4155 7119
4165 7113 4190 7098 4199 7093 4213 7068
4219 7058 4211 7047 4190 7042 4177 7062
4176 7063 4161 7086 4149 7104
FLASH FLOOD...RADAR INDICATED
$$
Frank237
WGUS71 KBOX 220118
FFSBOX
Flash Flood Statement
National Weather Service Boston/Norton MA
918 PM EDT Tue Jul 21 2026
MAC005-023-RIC005-220128-
/O.CAN.KBOX.FF.W.0002.000000T0000Z-260722T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bristol MA-Plymouth MA-Newport RI-
918 PM EDT Tue Jul 21 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN BRISTOL,
PLYMOUTH AND SOUTHEASTERN NEWPORT COUNTIES...
The heavy rain has ended. Additional flooding is no longer expected
to pose a threat. Please continue to heed remaining road closures.
&&
LAT...LON 4123 7143 4142 7121 4149 7121 4155 7119
4165 7113 4190 7098 4199 7093 4213 7068
4219 7058 4211 7047 4190 7042 4177 7062
4176 7063 4161 7086 4149 7104
$$
FrankThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 4:25 PM EDT | Special Weather Statement | BOX | Bristol, Kent, Newport, Providence, Washington | 80 min |
| Jul 21, 6:16 PM EDT | Special Weather Statement | BOX | Bristol, Kent, Washington | 89 min |
| Jul 21, 3:45 AM EDT | Small Craft Advisory | BOX | 67 hr | |
| Jul 21, 4:34 PM EDT | Special Marine Warning | BOX | 56 min | |
| Jul 21, 5:11 PM EDT | Special Weather Statement | BOX | Middlesex, Norfolk, Suffolk | 94 min |
Nearby
Flash Flood Warnings in Rhode Island, 2026Flash Flood Warnings in Massachusetts, 2026Every flash flood warning in 2026
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.