Alert archive / New Hampshire / Flood Watches in 2023
Flood Watch 21, NWS Gray, ME
NWS Gray, ME issued this flood watch at Sep 12, 2023, 3:11 PM EDT for Cheshire County, Hillsborough County, Rockingham County, New Hampshire. It took effect at Sep 13, 2023, 11:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Sep 12, 2023, 3:11 PM EDT (19:11 UTC)
- In effect from
- Sep 13, 2023, 11:00 AM EDT
- Expired
- Sep 13, 2023, 6:36 PM EDT
- In force
- 8 hr
- Issued by
- NWS Gray, ME
- Flood severity
- None
Counties Cheshire County, NH, Hillsborough County, NH, Rockingham County, NH
The radar
The Boston radar (KBOX), 118 km from the middle of the area, began a volume at 19:12 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, 7.2 hours before the alert went out and 250 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
- 24 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 632 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 9:50 PM EDT | Areal Flood Advisory | GYX | Androscoggin, Cumberland, Sagadahoc | 115 min |
| Sep 11, 9:54 PM EDT | Areal Flood Advisory | GYX | Androscoggin | 111 min |
| Sep 11, 10:37 PM EDT | Areal Flood Advisory | GYX | Kennebec | 113 min |
| Sep 11, 9:22 PM EDT | Areal Flood Warning | GYX | Hillsborough, Rockingham | 3 hr |
Nearby
Flood Watches in New Hampshire, 2023Every flood watch 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.