Alert archive / Massachusetts / Flash Flood Warnings in 2026
Flash Flood Warning 5, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Jul 29, 2026, 5:50 PM EDT for Capitol Planning Region, Connecticut; 4 counties in 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 29, 2026, 5:50 PM EDT (21:50 UTC)
- Expired
- Jul 29, 2026, 7:23 PM EDT
- In force
- 93 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Capitol Planning Region, CT, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 114 km from the middle of the area, began a volume at 21:52 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 29, 5:52 PM EDT | FLASH FLOOD | Belchertown, MA | Ware Rd westbound flooded and impassable. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 9.8 hours before the alert went out and 122 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
- 80 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 761 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- -21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
406
WGUS51 KBOX 292150
FFWBOX
CTC003-013-MAC011-013-015-027-300100-
/O.NEW.KBOX.FF.W.0005.260729T2150Z-260730T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boston/Norton MA
550 PM EDT Wed Jul 29 2026
The National Weather Service in Norton has issued a
* Flash Flood Warning for...
Northeastern Hartford County in northern Connecticut...
Northwestern Tolland County in northern Connecticut...
West Central Worcester County in central Massachusetts...
Southeastern Franklin County in western Massachusetts...
Southeastern Hampden County in western Massachusetts...
Southeastern Hampshire County in western Massachusetts...
* Until 900 PM EDT.
* At 550 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
2 and 4 inches of rain have fallen. Additional rainfall amounts of
1 to 2 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
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...
Springfield, Chicopee, Enfield, Amherst, Ludlow, South Hadley,
Longmeadow, East Longmeadow, Ellington, Belchertown, Wilbraham,
Palmer, Stafford, Athol, Somers, Ware, Monson, Granby, Hadley and
Hampden.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
&&
LAT...LON 4251 7252 4253 7224 4195 7232 4196 7259
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
Dooley1 follow-up statement
329 WGUS71 KBOX 292323 FFSBOX Flash Flood Statement National Weather Service Boston/Norton MA 723 PM EDT Wed Jul 29 2026 CTC003-013-MAC011-013-015-027-292333- /O.CAN.KBOX.FF.W.0005.000000T0000Z-260730T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Hartford CT-Tolland CT-Franklin MA-Hampden MA-Hampshire MA- Worcester MA- 723 PM EDT Wed Jul 29 2026 ...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN HARTFORD, NORTHWESTERN TOLLAND, WEST CENTRAL WORCESTER, SOUTHEASTERN FRANKLIN, SOUTHEASTERN HAMPDEN AND SOUTHEASTERN HAMPSHIRE COUNTIES... The heavy rain has ended. Please continue to heed remaining road closures. A Flood Watch remains in effect until 800 PM EDT for portions of northern Connecticut, central Massachusetts, and northern Rhode Island. A Flood Watch remains in effect until 800 PM EDT for portions of northern Connecticut and western Massachusetts. && LAT...LON 4251 7252 4253 7224 4195 7232 4196 7259 $$ Dooley
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 2:36 PM EDT | Flash Flood Warning | BOX | Capitol Planning Region | 117 min |
| Jul 29, 2:58 PM EDT | Flash Flood Warning | BOX | Franklin, Hampden, Hampshire | 95 min |
| Jul 29, 4:56 PM EDT | Areal Flood Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 3 hr |
Nearby
Flash Flood Warnings in Massachusetts, 2026Flash Flood Warnings in Connecticut, 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.