Alert archive / New Hampshire / Flash Flood Warnings in 2023
Flash Flood Warning 28, NWS Gray, ME
NWS Gray, ME issued this flash flood warning at Jul 4, 2023, 12:39 PM EDT for Cheshire County, Hillsborough County, Sullivan County, New Hampshire. It was in force for 3 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 4, 2023, 12:39 PM EDT (16:39 UTC)
- Expired
- Jul 4, 2023, 4:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Gray, ME
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cheshire County, NH, Hillsborough County, NH, Sullivan County, NH
The radar
The Boston radar (KBOX), 145 km from the middle of the area, began a volume at 16:39 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 12:00Z, 4.7 hours before the alert went out and 253 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
- 489 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 701 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.1
The office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 4:06 AM EDT | Areal Flood Advisory | GYX | Cumberland, York | 3 hr |
| Jul 4, 9:35 AM EDT | Flood Watch | GYX | York | 7 hr |
| Jul 4, 1:20 PM EDT | Special Weather Statement | GYX | Somerset | 25 min |
| Jul 4, 2:17 PM EDT | Areal Flood Advisory | GYX | Cumberland, Sagadahoc, York | 103 min |
| Jul 4, 2:52 PM EDT | Coastal Flood Advisory | GYX | Cumberland, York | 11 hr |
| Jul 4, 3:01 PM EDT | Areal Flood Advisory | GYX | Knox, Waldo | 119 min |
| Jul 4, 3:29 PM EDT | Areal Flood Advisory | GYX | Franklin, Oxford, Somerset | 3 hr |
| Jul 3, 10:51 PM EDT | Areal Flood Advisory | GYX | Cheshire | 2 hr |
| Jul 3, 11:21 PM EDT | Flash Flood Warning | GYX | Cheshire | 5 hr |
| Jul 4, 1:01 AM EDT | Flash Flood Warning | GYX | Cheshire | 3 hr |
| Jul 4, 1:33 AM EDT | Flash Flood Warning | GYX | Cheshire, Hillsborough | 3 hr |
| Jul 4, 11:04 AM EDT | Special Weather Statement | GYX | Coos | 26 min |
| Jul 4, 12:26 PM EDT | Flash Flood Warning | GYX | Belknap, Carroll | 4 hr |
| Jul 4, 12:30 PM EDT | Flash Flood Warning | GYX | Coos | 4 hr |
| Jul 4, 1:13 PM EDT | Special Weather Statement | GYX | Coos | 32 min |
| Jul 4, 1:48 PM EDT | Areal Flood Advisory | GYX | Cheshire, Hillsborough | 2 hr |
| Jul 4, 2:06 PM EDT | Special Weather Statement | GYX | Coos | 39 min |
| Jul 4, 2:25 PM EDT | Areal Flood Advisory | GYX | Coos | 3 hr |
| Jul 4, 3:14 PM EDT | Special Weather Statement | GYX | Coos | 31 min |
| Jul 4, 3:35 PM EDT | Areal Flood Advisory | GYX | Carroll, Coos, Grafton | 17 min |
| Jul 4, 3:52 PM EDT | Flash Flood Warning | GYX | Carroll, Coos, Grafton | 3 hr |
| Jul 4, 6:22 PM EDT | Special Weather Statement | GYX | Grafton | 38 min |
| Jul 4, 6:47 PM EDT | Flash Flood Warning | GYX | Grafton | 118 min |
| Jul 4, 6:50 PM EDT | Special Weather Statement | GYX | Grafton | 40 min |
| Jul 4, 7:11 PM EDT | Severe Thunderstorm Warning | GYX | Grafton | 34 min |
| Jul 4, 7:34 PM EDT | Special Weather Statement | GYX | Sullivan | 41 min |
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.