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Home Return to list Flash Flood Warning 0004 Issued by the Gray / Portland Forecast Office
Action: New Issued At: 2026-08-03 06:22:22
070
WGUS51 KGYX 031121
FFWGYX
NHC011-013-015-017-031515-
/O.NEW.KGYX.FF.W.0004.260803T1121Z-260803T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Gray ME
721 AM EDT Mon Aug 3 2026
The National Weather Service in Gray has issued a
* Flash Flood Warning for...
Southeastern Merrimack County in central New Hampshire...
Southwestern Strafford County in central New Hampshire...
Southern Hillsborough County in southern New Hampshire...
Rockingham County in southern New Hampshire...
* Until 1115 AM EDT.
* At 721 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2.5 inches of
rain have fallen. The expected rainfall rate is 1 to 3 inches in 1
hour. 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...
Manchester, Nashua, Derry, Merrimack, Durham, Exeter, Salem,
Northwood and Bedford.
This includes the following highways...
Interstate 93 between mile markers 1 and 30.
Interstate 293 between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4296 7169 4302 7164 4311 7149 4322 7137
4328 7111 4320 7103 4310 7098 4304 7098
4295 7103 4284 7111 4270 7129 4271 7193
4278 7193
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR
$$
MLE
Action: Continued Issued At: 2026-08-03 06:56:23
804
WGUS71 KGYX 031155
FFSGYX
Flash Flood Statement
National Weather Service Gray ME
755 AM EDT Mon Aug 3 2026
NHC011-013-015-017-031515-
/O.CON.KGYX.FF.W.0004.000000T0000Z-260803T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hillsborough NH-Merrimack NH-Rockingham NH-Strafford NH-
755 AM EDT Mon Aug 3 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT THIS
MORNING FOR SOUTHEASTERN MERRIMACK, SOUTHWESTERN STRAFFORD, SOUTHERN
HILLSBOROUGH AND ROCKINGHAM COUNTIES...
At 755 AM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2.5 inches of rain have
fallen. The expected rainfall rate is 1 to 3 inches in 1 hour. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. The heaviest rainfall
is expected in southeastern Hillsborough County and
southeastern Rockingham County. Urban flash flooding is
expected.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Manchester, Nashua, Derry, Merrimack, Durham, Exeter, Salem,
Northwood and Bedford.
This includes the following highways...
Interstate 93 between mile markers 1 and 31.
Interstate 293 between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4296 7169 4302 7164 4311 7149 4322 7137
4328 7111 4320 7103 4310 7098 4304 7098
4295 7103 4284 7111 4270 7129 4271 7193
4278 7193
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR
$$
MLE
Action: Cancelled Issued At: 2026-08-03 09:37:14
809
WGUS71 KGYX 031436
FFSGYX
Flash Flood Statement
National Weather Service Gray ME
1036 AM EDT Mon Aug 3 2026
NHC013-017-031446-
/O.CAN.KGYX.FF.W.0004.000000T0000Z-260803T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Merrimack NH-Strafford NH-
1036 AM EDT Mon Aug 3 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN MERRIMACK AND
SOUTHWESTERN STRAFFORD COUNTIES...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
&&
LAT...LON 4278 7159 4288 7152 4290 7138 4292 7128
4291 7117 4287 7113 4283 7114 4274 7124
4274 7125 4274 7126 4273 7126 4273 7127
4271 7128 4270 7129 4273 7166
$$
NHC011-015-031515-
/O.CON.KGYX.FF.W.0004.000000T0000Z-260803T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hillsborough NH-Rockingham NH-
1036 AM EDT Mon Aug 3 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT THIS
MORNING FOR SOUTHEASTERN HILLSBOROUGH AND SOUTHWESTERN ROCKINGHAM
COUNTIES...
At 1036 AM EDT, Rainfall reports indicated between 2.5 and 4.5
inches of rain have fallen across the warned area. Though rainfall
has lessened or ended, some small brooks and streams may still be
flooded through late morning.
HAZARD...Flash flooding of small streams.
SOURCE...Radar.
IMPACT...Flash flooding of brooks and streams, urban areas,
highways, streets and underpasses.
Some locations that will experience flash flooding include...
Nashua, Derry, Hollis and Hudson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4278 7159 4288 7152 4290 7138 4292 7128
4291 7117 4287 7113 4283 7114 4274 7124
4274 7125 4274 7126 4273 7126 4273 7127
4271 7128 4270 7129 4273 7166
FLASH FLOOD...RADAR INDICATED
$$
SJ
Action: Continued Issued At: 2026-08-03 09:37:14
809
WGUS71 KGYX 031436
FFSGYX
Flash Flood Statement
National Weather Service Gray ME
1036 AM EDT Mon Aug 3 2026
NHC013-017-031446-
/O.CAN.KGYX.FF.W.0004.000000T0000Z-260803T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Merrimack NH-Strafford NH-
1036 AM EDT Mon Aug 3 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN MERRIMACK AND
SOUTHWESTERN STRAFFORD COUNTIES...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
&&
LAT...LON 4278 7159 4288 7152 4290 7138 4292 7128
4291 7117 4287 7113 4283 7114 4274 7124
4274 7125 4274 7126 4273 7126 4273 7127
4271 7128 4270 7129 4273 7166
$$
NHC011-015-031515-
/O.CON.KGYX.FF.W.0004.000000T0000Z-260803T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hillsborough NH-Rockingham NH-
1036 AM EDT Mon Aug 3 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT THIS
MORNING FOR SOUTHEASTERN HILLSBOROUGH AND SOUTHWESTERN ROCKINGHAM
COUNTIES...
At 1036 AM EDT, Rainfall reports indicated between 2.5 and 4.5
inches of rain have fallen across the warned area. Though rainfall
has lessened or ended, some small brooks and streams may still be
flooded through late morning.
HAZARD...Flash flooding of small streams.
SOURCE...Radar.
IMPACT...Flash flooding of brooks and streams, urban areas,
highways, streets and underpasses.
Some locations that will experience flash flooding include...
Nashua, Derry, Hollis and Hudson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4278 7159 4288 7152 4290 7138 4292 7128
4291 7117 4287 7113 4283 7114 4274 7124
4274 7125 4274 7126 4273 7126 4273 7127
4271 7128 4270 7129 4273 7166
FLASH FLOOD...RADAR INDICATED
$$
SJ
Action: Expired Issued At: 2026-08-03 10:07:45
507
WGUS71 KGYX 031507
FFSGYX
Flash Flood Statement
National Weather Service Gray ME
1107 AM EDT Mon Aug 3 2026
NHC011-015-031517-
/O.EXP.KGYX.FF.W.0004.000000T0000Z-260803T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hillsborough NH-Rockingham NH-
1107 AM EDT Mon Aug 3 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 1115 AM EDT THIS MORNING FOR
SOUTHEASTERN HILLSBOROUGH AND SOUTHWESTERN ROCKINGHAM COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
&&
LAT...LON 4278 7159 4288 7152 4290 7138 4292 7128
4291 7117 4287 7113 4283 7114 4274 7124
4274 7125 4274 7126 4273 7126 4273 7127
4271 7128 4270 7129 4273 7166
$$
SJ
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