Alert archive / New Hampshire / Areal Flood Warnings in 2021
Areal Flood Warning 3, NWS Gray, ME
NWS Gray, ME issued this areal flood warning at Jul 18, 2021, 6:26 AM EDT for Cheshire County, Hillsborough County, New Hampshire. It was in force for 6 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 18, 2021, 6:26 AM EDT (10:26 UTC)
- Expired
- Jul 18, 2021, 12:15 PM EDT
- In force
- 6 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 10:31 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
Albany, NY (KALY), launched 00:00Z, 10.4 hours before the alert went out and 153 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
- 30 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 630 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal 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 areal flood warning went out at Jul 18, 3:39 AM EDT, 2 hours 47 minutes earlier.
Area forecast discussion, Jul 18, 3:39 AM EDT, 2 hours 47 minutes before
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</html>Hazardous weather outlook, Jul 18, 4:19 AM EDT, 2 hours 7 minutes before
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Special weather statement, Jul 18, 5:56 AM EDT, 30 minutes before
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</html>The office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:59 AM EDT | Areal Flood Advisory | GYX | Androscoggin, Cumberland, Lincoln, Sagadahoc, York | 3 hr |
| Jul 18, 9:50 AM EDT | Areal Flood Advisory | GYX | Cumberland, Kennebec, Knox, Lincoln, Sagadahoc, Waldo | 3 hr |
| Jul 18, 10:36 AM EDT | Flash Flood Warning | GYX | Androscoggin, Cumberland, Kennebec, Knox, Lincoln, Sagadahoc | 84 min |
| Jul 17, 10:42 PM EDT | Areal Flood Warning | GYX | Cheshire, Hillsborough | 3 hr |
| Jul 17, 11:03 PM EDT | Special Weather Statement | GYX | Hillsborough | 42 min |
| Jul 18, 12:01 AM EDT | Flash Flood Warning | GYX | Cheshire, Hillsborough | 4 hr |
| Jul 18, 3:55 AM EDT | Areal Flood Advisory | GYX | Cheshire, Hillsborough | 2 hr |
| Jul 18, 5:56 AM EDT | Special Weather Statement | GYX | Rockingham | 34 min |
| Jul 18, 6:34 AM EDT | Special Weather Statement | GYX | Rockingham | 26 min |
| Jul 18, 3:00 PM EDT | Areal Flood Warning | GYX | Cheshire | 30 hr |
Nearby
Areal Flood Warnings in New Hampshire, 2021Every areal flood warning in 2021
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.