Alert archive / Connecticut / Flash Flood Warnings in 2026

Flash Flood Warning 7, NWS Boston/Norton, MA

August 3, 2026Capitol Planning Region, Connecticut; Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Aug 3, 2026, 5:55 AM EDT for Capitol Planning Region, Connecticut; Hampden County, Hampshire County, Massachusetts. It was in force for 3 hr. 12 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 3, 2026, 5:55 AM EDT (09:55 UTC)
Expired: Aug 3, 2026, 9:00 AM EDT
In force: 3 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

Counties Capitol Planning Region, CT, Hampden County, MA, Hampshire County, MA

The radar

The Brookhaven radar (KOKX), 101 km from the middle of the area, began a volume at 09:56 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 3, 6:10 AM EDT	FLASH FLOOD	2 Sw West Springfield, MA	In West Springfield, a basement was flooding on Westfield St. Relayed by amateur radio.
Aug 3, 6:10 AM EDT	FLASH FLOOD	3 Ne Wilbraham, MA	In Palmer, Wilbraham St underpass was flooded and impassable. Relayed by amateur radio.
Aug 3, 6:18 AM EDT	FLASH FLOOD	1 E West Springfield, MA	In West Springfield, a basement was flooding on Elm St. Relayed by amateur radio.
Aug 3, 6:25 AM EDT	FLASH FLOOD	2 N Agawam, MA	In West Springfield, Rt 5 was closed from the north end bridge to memorial bridge due to both underpasses flooded to 2+ feet depth. Relayed by amateur radio.
Aug 3, 6:27 AM EDT	RAIN 2	3 N Canton, CT
Aug 3, 6:40 AM EDT	FLASH FLOOD	2 N Enfield, CT	In Enfield, Cranbrook Blvd at Freshwater Blvd was closed due to flooding. Relayed by amateur radio.
Aug 3, 6:50 AM EDT	FLASH FLOOD	Farmington, CT	In Farmington, several sections of Route 10 with flooding depth of 1 foot on Route 10 at the Farmington/Plainville CT town line. Relayed by amateur radio.
Aug 3, 6:56 AM EDT	FLASH FLOOD	2 Nw Agawam, MA	In Agawam, White Brook (also known as Deep Guttar Brook) was out of its banks and flooding North St with a car stuck in the flooding. Relayed by amateur radio.
Aug 3, 7:05 AM EDT	FLASH FLOOD	2 Ne Agawam, MA	In Agawam, the Rt 5 underpass was flooded and impassable with a car stuck in the flooding. Relayed by amateur radio.
Aug 3, 7:20 AM EDT	FLASH FLOOD	Southington, CT	In Southington, I-84 - right lane near the west street exit has significant street flooding. Relayed by amateur radio.
Aug 3, 7:24 AM EDT	FLASH FLOOD	Springfield, MA	In Springfield, East Page Boulevard at I-291 - cars stuck in street flooding. Relayed by amateur radio.
Aug 3, 7:44 AM EDT	FLASH FLOOD	3 Wsw Springfield, MA	Springfield EM reported substantial flooding in Springfield including flooding beneath overpasses on route 5.

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, 9.9 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.

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: 151 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 507 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

569 
WGUS51 KBOX 030955
FFWBOX
CTC003-013-MAC013-015-031300-
/O.NEW.KBOX.FF.W.0007.260803T0955Z-260803T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boston/Norton MA
555 AM EDT Mon Aug 3 2026

The National Weather Service in Norton has issued a

* Flash Flood Warning for...
  Hartford County in northern Connecticut...
  Northwestern Tolland County in northern Connecticut...
  Hampden County in western Massachusetts...
  Southeastern Hampshire County in western Massachusetts...

* Until 900 AM EDT.

* At 555 AM EDT, Doppler radar indicated heavy rain across the 
  warned area. Between 1 and 2 inches of rain have fallen. The 
  expected rainfall rate is 1 to 2 inches in 1 hour. 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.

  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, Hartford, New Britain, West Hartford, Bristol, 
  Manchester, Chicopee, East Hartford, Enfield, Southington, 
  Westfield, Holyoke, Glastonbury, Newington, Vernon, Windsor, 
  Agawam, West Springfield, Wethersfield and South Windsor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 4224 7226 4164 7250 4163 7271 4158 7275
      4157 7280 4155 7282 4157 7283 4157 7285
      4155 7285 4156 7288 4156 7295 4164 7294
      4164 7298 4180 7302 4181 7295 4189 7294
      4190 7292 4197 7289 4197 7302 4226 7286

FLASH FLOOD...RADAR INDICATED

$$

BW

1 follow-up statement

638 
WGUS71 KBOX 031257
FFSBOX

Flash Flood Statement
National Weather Service Boston/Norton MA
857 AM EDT Mon Aug 3 2026

CTC003-013-MAC013-015-031307-
/O.EXP.KBOX.FF.W.0007.000000T0000Z-260803T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Tolland CT-Hampden MA-Hampshire MA-
857 AM EDT Mon Aug 3 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING FOR 
HARTFORD, NORTHWESTERN TOLLAND, HAMPDEN AND SOUTHEASTERN HAMPSHIRE 
COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 4224 7226 4164 7250 4163 7271 4158 7275
      4157 7280 4155 7282 4157 7283 4157 7285
      4155 7285 4156 7288 4156 7295 4164 7294
      4164 7298 4180 7302 4181 7295 4189 7294
      4190 7292 4197 7289 4197 7302 4226 7286

$$

RM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 6:49 AM EDT	Flash Flood Warning	BOX	Middlesex, Worcester	3 hr
Aug 3, 8:15 AM EDT	Flash Flood Warning	BOX	Bristol	6 hr
Aug 3, 12:00 PM EDT	Flash Flood Warning	BOX	Bristol, Plymouth	105 min
Aug 3, 2:43 PM EDT	Rip Current Statement	BOX	Bristol, Dukes, Nantucket	30 hr

Nearby

Flash Flood Warnings in Connecticut, 2026 Flash Flood Warnings in Massachusetts, 2026 Every 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.