Alert archive / New Hampshire / Areal Flood Warnings in 2021
Areal Flood Warning 2, NWS Gray, ME
NWS Gray, ME issued this areal flood warning at Jul 17, 2021, 10:42 PM EDT for Cheshire County, Hillsborough 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 17, 2021, 10:42 PM EDT (02:42 UTC)
- Expired
- Jul 18, 2021, 1:45 AM EDT
- In force
- 3 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 02:46 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, 2.7 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 17, 8:57 PM EDT, 1 hour 45 minutes earlier.
Area forecast discussion, Jul 17, 8:57 PM EDT, 1 hour 45 minutes before
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</html>Hazardous weather outlook, Jul 17, 3:10 PM EDT, 7 hours 32 minutes before
Hazardous Weather Outlook National Weather Service Gray ME 310 PM EDT Sat Jul 17 2021 MEZ007>009-012>014-018>028-033-NHZ001>010-013-014-181915- Northern Oxford-Northern Franklin-Central Somerset-Southern Oxford- Southern Franklin-Southern Somerset-Interior York- Central Interior Cumberland-Androscoggin-Kennebec-Interior Waldo- Coastal York-Coastal Cumberland-Sagadahoc-Lincoln-Knox-Coastal Waldo- Interior Cumberland Highlands-Northern Coos-Southern Coos- Northern Grafton-Northern Carroll-Southern Grafton-Southern Carroll- Sullivan-Merrimack-Belknap-Strafford-Interior Rockingham- Coastal Rockingham- 310 PM EDT Sat Jul 17 2021 This Hazardous Weather Outlook is for Maine, south central Maine, southwest Maine, west central Maine, western Maine, central New Hampshire, northern New Hampshire and southern New Hampshire. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NHZ011-012-015-181915- Cheshire-Eastern Hillsborough-Western And Central Hillsborough- 310 PM EDT Sat Jul 17 2021 This Hazardous Weather Outlook is for New Hampshire and southern New Hampshire. .DAY ONE...This afternoon and tonight. Isolated strong thunderstorms are possible early this evening with locally heavy rain. More numerous showers and downpours are expected Tonight into Sunday. Localized flooding is possible in persistent downpours. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ150>154-181915- Coastal Waters from Stonington, ME to Port Clyde, ME out 25 NM- Penobscot Bay- Coastal Waters from Port Clyde, ME to Cape Elizabeth, ME out 25 NM- Casco Bay- Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM- 310 PM EDT Sat Jul 17 2021 This Hazardous Weather Outlook is for Atlantic coastal waters. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Local storm report, Jul 17, 8:05 PM EDT, 2 hours 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAY ME
805 PM EDT SAT JUL 17 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 PM HEAVY RAIN 2 SE KEENE 42.93N 72.27W
07/17/2021 M0.97 INCH CHESHIRE NH TRAINED SPOTTER
OBSERVER REPORTED 0.97 INCHES OF RAIN IN 1
HOUR AND SEVERAL INCHES OF WATER ON VALLEY
ST.
&&
TUBBSLocal storm report, Jul 17, 9:11 PM EDT, 1 hour 31 minutes before
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</html>Local storm report, Jul 17, 9:19 PM EDT, 1 hour 23 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, 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, 6:26 AM EDT | Areal Flood Warning | GYX | Cheshire, Hillsborough | 6 hr |
| 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.