Alert archive / New Hampshire / Flash Flood Warnings in 2020

Flash Flood Warning 12, NWS Gray, ME

July 8, 2020Cheshire County, Hillsborough County, New Hampshire

NWS Gray, ME issued this flash flood warning at Jul 8, 2020, 5:36 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 8, 2020, 5:36 PM EDT (21:36 UTC)
Expired: Jul 8, 2020, 8:32 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

The radar

The Boston radar (KBOX), 127 km from the middle of the area, began a volume at 21:39 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

Albany, NY (KALY), launched 12:00Z, 9.6 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 140 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 735 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 8, 3:10 PM EDT, 2 hours 26 minutes earlier.

Area forecast discussion, Jul 8, 3:10 PM EDT, 2 hours 26 minutes before

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Hazardous weather outlook, Jul 8, 3:10 PM EDT, 2 hours 26 minutes before

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In the hours before

Local storm report, Jul 8, 4:57 PM EDT, 39 minutes before

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Local storm report, Jul 8, 5:02 PM EDT, 34 minutes before

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Local storm report, Jul 8, 5:04 PM EDT, 32 minutes before

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Local storm report, Jul 8, 5:09 PM EDT, 27 minutes before

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Local storm report, Jul 8, 5:21 PM EDT, 15 minutes before

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Local storm report, Jul 8, 5:30 PM EDT, 6 minutes before

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The office that day

Everything else NWS Gray, ME issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 8, 1:54 PM EDT	Areal Flood Advisory	GYX	Oxford	4 hr
Jul 8, 2:01 PM EDT	Special Weather Statement	GYX	Androscoggin	29 min
Jul 8, 2:07 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	38 min
Jul 8, 2:53 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	52 min
Jul 8, 3:08 PM EDT	Special Weather Statement	GYX	Franklin, Somerset	67 min
Jul 8, 3:16 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Oxford	44 min
Jul 8, 3:25 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland	50 min
Jul 8, 3:26 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford, Somerset	49 min
Jul 8, 3:54 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Oxford, Somerset	51 min
Jul 8, 4:10 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford, Somerset	50 min
Jul 8, 4:34 PM EDT	Severe Thunderstorm Warning	GYX	Oxford, York	41 min
Jul 8, 4:39 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec	51 min
Jul 8, 4:54 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Oxford, Somerset, Waldo	51 min
Jul 8, 4:59 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	46 min
Jul 8, 5:06 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	39 min
Jul 8, 5:15 PM EDT	Areal Flood Advisory	GYX	Androscoggin, Franklin, Kennebec, Oxford	3 hr
Jul 8, 5:22 PM EDT	Areal Flood Advisory	GYX	Franklin, Somerset	3 hr
Jul 8, 5:24 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	51 min
Jul 8, 5:39 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Kennebec, Knox, Lincoln, Sagadahoc and 2 more	36 min
Jul 8, 5:41 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	34 min
Jul 8, 5:50 PM EDT	Special Weather Statement	GYX	Waldo	40 min
Jul 8, 6:02 PM EDT	Special Marine Warning	GYX		88 min
Jul 8, 6:02 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Kennebec, Lincoln, Oxford, Sagadahoc and 1 more	43 min
Jul 8, 6:16 PM EDT	Areal Flood Advisory	GYX	Androscoggin, Cumberland, Oxford	3 hr
Jul 8, 6:26 PM EDT	Severe Thunderstorm Warning	GYX	Knox, Lincoln, Waldo	49 min
Jul 8, 6:30 PM EDT	Areal Flood Advisory	GYX	Kennebec, Knox, Lincoln, Sagadahoc, Waldo	2 hr
Jul 8, 6:56 PM EDT	Special Marine Warning	GYX		64 min
Jul 8, 6:56 PM EDT	Special Weather Statement	GYX	York	34 min
Jul 8, 7:11 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	49 min
Jul 8, 3:29 AM EDT	Heat Advisory	GYX	Hillsborough, Merrimack, Rockingham	40 hr
Jul 8, 9:24 AM EDT	Flash Flood Watch	GYX	Hillsborough, Merrimack, Rockingham	11 hr
Jul 8, 1:37 PM EDT	Special Weather Statement	GYX	Carroll	53 min
Jul 8, 2:14 PM EDT	Special Weather Statement	GYX	Grafton	46 min
Jul 8, 2:19 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Sullivan	56 min
Jul 8, 2:36 PM EDT	Flash Flood Warning	GYX	Cheshire, Sullivan	114 min
Jul 8, 3:29 PM EDT	Special Weather Statement	GYX	Cheshire	31 min
Jul 8, 3:37 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire	53 min
Jul 8, 3:57 PM EDT	Special Weather Statement	GYX	Belknap	33 min
Jul 8, 4:23 PM EDT	Flash Flood Warning	GYX	Cheshire	3 hr
Jul 8, 4:25 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire	50 min
Jul 8, 4:27 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack, Strafford	48 min
Jul 8, 4:40 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Hillsborough	50 min
Jul 8, 5:09 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Hillsborough	51 min
Jul 8, 5:19 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Coos, Grafton	41 min
Jul 8, 5:21 PM EDT	Flash Flood Warning	GYX	Coos, Grafton	3 hr
Jul 8, 5:58 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Coos, Grafton	47 min
Jul 8, 6:35 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Grafton	40 min
Jul 8, 6:52 PM EDT	Special Weather Statement	GYX	Belknap	23 min
Jul 8, 7:14 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Grafton, Merrimack, Strafford	46 min

Nearby

Flash Flood Warnings in New Hampshire, 2020 Every flash flood warning in 2020

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.