Alert archive / New Hampshire / Flash Flood Warnings in 2023

Flash Flood Warning 12, NWS Gray, ME

June 26, 2023Carroll County, Coos County, Grafton County, New Hampshire

NWS Gray, ME issued this flash flood warning at Jun 26, 2023, 2:40 AM EDT for Carroll County, Coos County, Grafton County, New Hampshire. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 26, 2023, 2:40 AM EDT (06:40 UTC)
Expired: Jun 26, 2023, 7:45 AM EDT
In force: 5 hr
Issued by: NWS Gray, ME
Area: Storm-based polygon
Flood severity: None

Counties Carroll County, NH, Coos County, NH, Grafton County, NH

The radar

The Portland,ME radar (KGYX), 100 km from the middle of the area, began a volume at 06:40 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.

The nearest sounding before it

Gray, ME (KGYX), launched 00:00Z, 6.7 hours before the alert went out and 99 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: 86 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 1119 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Gray, ME wrote its last area forecast discussion before this flash flood warning went out at Jun 26, 12:59 AM EDT, 1 hour 41 minutes earlier.

Area forecast discussion, Jun 26, 12:59 AM EDT, 1 hour 41 minutes before

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Hazardous weather outlook, Jun 25, 3:53 PM EDT, 10 hours 47 minutes before

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In the hours before

Local storm report, Jun 26, 1:02 AM EDT, 1 hour 38 minutes before

Preliminary Local Storm Report
National Weather Service Gray ME
102 AM EDT Mon Jun 26 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1100 PM     Rain             5 N Bristol             43.66N 71.72W
06/25/2023  M2.23 inch       Grafton            NH   Trained Spotter

&&

HAT

The office that day

Everything else NWS Gray, ME issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 25, 8:13 PM EDT	Areal Flood Advisory	GYX	Kennebec, Somerset, Waldo	2 hr
Jun 25, 8:21 PM EDT	Areal Flood Advisory	GYX	Franklin	114 min
Jun 25, 8:38 PM EDT	Flash Flood Warning	GYX	Franklin	99 min
Jun 26, 3:19 AM EDT	Areal Flood Advisory	GYX	Androscoggin, Cumberland, Oxford, York	3 hr
Jun 26, 4:22 AM EDT	Areal Flood Advisory	GYX	Androscoggin, Cumberland, Franklin, Oxford	3 hr
Jun 26, 6:17 AM EDT	Flash Flood Warning	GYX	Franklin, Oxford	6 hr
Jun 26, 6:25 AM EDT	Dense Fog Advisory	GYX	Cumberland, Knox, Lincoln, Sagadahoc, Waldo, York	3 hr
Jun 26, 7:48 AM EDT	River Flood Warning	GYX	Oxford	6 hr
Jun 26, 12:07 PM EDT	Areal Flood Warning	GYX	Franklin, Oxford	3 hr
Jun 26, 2:27 PM EDT	Flood Watch	GYX	Franklin, Oxford	32 hr
Jun 25, 9:51 PM EDT	Areal Flood Advisory	GYX	Belknap, Carroll, Grafton, Merrimack, Sullivan	5 hr
Jun 25, 11:27 PM EDT	Flash Flood Warning	GYX	Belknap, Grafton, Merrimack, Sullivan	2 hr
Jun 26, 12:39 AM EDT	Areal Flood Advisory	GYX	Carroll, Coos, Grafton	6 hr
Jun 26, 2:38 PM EDT	Special Weather Statement	GYX	Hillsborough, Sullivan	52 min
Jun 26, 3:22 PM EDT	Areal Flood Advisory	GYX	Hillsborough, Merrimack, Rockingham	2 hr
Jun 26, 3:25 PM EDT	Special Weather Statement	GYX	Rockingham	65 min
Jun 26, 3:26 PM EDT	Special Weather Statement	GYX	Hillsborough	49 min
Jun 26, 5:15 PM EDT	Flash Flood Warning	GYX	Hillsborough, Merrimack, Rockingham	3 hr
Jun 26, 5:48 PM EDT	Special Weather Statement	GYX	Hillsborough	27 min
Jun 26, 6:05 PM EDT	Special Weather Statement	GYX	Rockingham	25 min
Jun 26, 6:52 PM EDT	Special Weather Statement	GYX	Cheshire	38 min
Jun 26, 7:08 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire	37 min
Jun 26, 7:45 PM EDT	Special Weather Statement	GYX	Cheshire	30 min
Jun 26, 7:51 PM EDT	Areal Flood Advisory	GYX	Hillsborough, Merrimack, Rockingham	114 min
Jun 26, 11:54 AM EDT	Special Weather Statement	GYX	Windsor	51 min

Nearby

Flash Flood Warnings in New Hampshire, 2023 Every flash flood warning in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.