Alert archive / New Hampshire / Flash Flood Warnings in 2023
Flash Flood Warning 45, NWS Gray, ME
NWS Gray, ME issued this flash flood warning at Jul 16, 2023, 7:33 AM EDT for Cheshire County, Hillsborough County, New Hampshire. It was in force for 4 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
- Jul 16, 2023, 7:33 AM EDT (11:33 UTC)
- Expired
- Jul 16, 2023, 11:30 AM EDT
- In force
- 4 hr
- Issued by
- NWS Gray, ME
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cheshire County, NH, Hillsborough County, NH
The radar
The Boston radar (KBOX), 127 km from the middle of the area, began a volume at 11:33 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
Brookhaven, NY (KOKX), launched 00:00Z, 11.6 hours before the alert went out and 239 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
- 1061 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 624 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.0
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 Jul 16, 4:12 AM EDT, 3 hours 21 minutes earlier.
Area forecast discussion, Jul 16, 4:12 AM EDT, 3 hours 21 minutes before
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</html>Hazardous weather outlook, Jul 16, 3:56 AM EDT, 3 hours 37 minutes before
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Special weather statement, Jul 16, 7:18 AM EDT, 15 minutes before
Special Weather Statement
National Weather Service Gray ME
718 AM EDT Sun Jul 16 2023
MEZ007-012-013-018>022-024>027-033-NHZ002>006-161200-
Northern Oxford ME-Interior Cumberland Highlands ME-Kennebec ME-
Central Interior Cumberland ME-Coastal Cumberland ME-Sagadahoc ME-
Southern Oxford ME-Androscoggin ME-Interior York ME-
Interior Waldo ME-Southern Franklin ME-Lincoln ME-Knox ME-
Southern Coos NH-Northern Carroll NH-Northern Grafton NH-
Southern Carroll NH-Southern Grafton NH-
718 AM EDT Sun Jul 16 2023
...A line of heavy rain moving northeast will impact portions of
Oxford, west central Waldo, Androscoggin, southeastern Franklin,
Kennebec, northwestern Knox, north central York, Lincoln,
Cumberland, Sagadahoc, southern Coos, northeastern Grafton and
northern Carroll Counties through 800 AM EDT...
HAZARD...Torrential rain with rainfall rates over 2 inches per hour.
This will reduce visibility and could cause hydroplaning
for motorists. More rain is expected throughout the day
which could result in flash floods as repeating shower
activity is expected. Please stay tuned to the latest
warnings from the National Weather Service.
SOURCE...Radar indicated.
IMPACT...Use caution if traveling through into this drenching
rainfall. Visibility will drop to under a quarter of an
inch cause rapid ponding on roadways and low lying areas.
Locations impacted include...
Lewiston, Auburn, Brunswick, Augusta, Westbrook, Waterville, Conway,
Berlin, Bath, Gardiner, Bridgton, Lancaster, Fryeburg, Mechanic
Falls, Bethel, Bethlehem, Damariscotta, Lincoln, Naples and Oakland.
This includes the following highways...
Interstate 295 between mile markers 12 and 51.
Interstate 93 between mile markers 86 and 114.
Interstate 95 between mile markers 54 and 128.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4466 7142 4454 6933 4380 6951 4372 6956
4375 6969 4370 6973 4386 7193
TIME...MOT...LOC 1114Z 240DEG 49KT 4398 7142
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH
SJThe office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 8:02 PM EDT | Areal Flood Advisory | GYX | Somerset | 6 hr |
| Jul 15, 8:59 PM EDT | Areal Flood Advisory | GYX | Oxford | 3 hr |
| Jul 16, 7:18 AM EDT | Special Weather Statement | GYX | Androscoggin, Cumberland, Kennebec, Lincoln, Oxford, Sagadahoc | 42 min |
| Jul 16, 8:14 AM EDT | Flash Flood Warning | GYX | York | 4 hr |
| Jul 16, 12:18 PM EDT | River Flood Warning | GYX | Cumberland, Oxford | 25 hr |
| Jul 16, 12:31 PM EDT | Flash Flood Warning | GYX | Cumberland, Oxford | 5 hr |
| Jul 16, 12:37 PM EDT | Special Marine Warning | GYX | 53 min | |
| Jul 16, 1:19 PM EDT | Areal Flood Warning | GYX | Cumberland, Oxford, York | 5 hr |
| Jul 16, 2:22 PM EDT | Flash Flood Warning | GYX | Cumberland, Oxford, York | 6 hr |
| Jul 16, 2:42 PM EDT | Flash Flood Warning | GYX | Cumberland, Oxford | 3 hr |
| Jul 16, 4:02 PM EDT | Areal Flood Warning | GYX | Androscoggin, Franklin, Kennebec, Oxford, Somerset, Waldo | 6 hr |
| Jul 16, 4:04 PM EDT | River Flood Warning | GYX | Oxford | 19 hr |
| Jul 16, 6:16 PM EDT | Areal Flood Warning | GYX | Cumberland, Oxford, York | 11 hr |
| Jul 15, 9:28 PM EDT | Areal Flood Advisory | GYX | Grafton | 3 hr |
| Jul 15, 9:46 PM EDT | Flash Flood Warning | GYX | Grafton | 3 hr |
| Jul 16, 8:21 AM EDT | Special Weather Statement | GYX | Rockingham | 24 min |
| Jul 16, 8:22 AM EDT | Flash Flood Warning | GYX | Hillsborough, Merrimack, Rockingham | 3 hr |
| Jul 16, 8:29 AM EDT | Tornado Warning | GYX | Hillsborough, Merrimack, Rockingham | 31 min |
| Jul 16, 9:01 AM EDT | Tornado Warning | GYX | Hillsborough, Rockingham | 16 min |
| Jul 16, 9:34 AM EDT | Severe Thunderstorm Warning | GYX | Rockingham | 41 min |
| Jul 16, 9:51 AM EDT | Tornado Warning | GYX | Rockingham, Strafford | 24 min |
| Jul 16, 10:16 AM EDT | Tornado Warning | GYX | Hillsborough | 29 min |
| Jul 16, 10:32 AM EDT | Flash Flood Warning | GYX | Belknap, Carroll, Coos, Grafton, Merrimack, Strafford | 6 hr |
| Jul 16, 11:24 AM EDT | Flash Flood Warning | GYX | Belknap, Cheshire, Hillsborough, Merrimack, Rockingham | 7 hr |
| Jul 16, 11:33 AM EDT | Flash Flood Warning | GYX | Belknap, Carroll, Merrimack, Strafford | 6 hr |
| Jul 16, 11:39 AM EDT | Areal Flood Warning | GYX | Cheshire, Hillsborough, Merrimack, Sullivan | 6 hr |
| Jul 16, 12:19 PM EDT | River Flood Warning | GYX | Grafton | 7 hr |
| Jul 16, 1:01 PM EDT | Flash Flood Warning | GYX | Belknap, Carroll, Strafford | 5 hr |
| Jul 16, 2:16 PM EDT | River Flood Warning | GYX | Belknap, Merrimack | 49 hr |
| Jul 16, 4:33 PM EDT | Areal Flood Advisory | GYX | Carroll | 6 hr |
| Jul 16, 6:03 PM EDT | Areal Flood Warning | GYX | Belknap, Merrimack | 12 hr |
| Jul 16, 7:30 PM EDT | River Flood Warning | GYX | Merrimack | 10 hr |
Nearby
Flash Flood Warnings in New Hampshire, 2023Every 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.