Alert archive / Maine / Flash Flood Watches in 2008

Flash Flood Watch 2, NWS Gray, ME

July 20, 2008Franklin County, Oxford County, Somerset County, Maine; Carroll County, Coos County, Grafton County, New Hampshire

NWS Gray, ME issued this flash flood watch at Jul 20, 2008, 11:46 AM EDT for Franklin County, Oxford County, Somerset County, Maine; Carroll County, Coos County, Grafton County, New Hampshire. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Jul 20, 2008, 11:46 AM EDT (15:46 UTC)
Expired: Jul 21, 2008, 3:20 AM EDT
In force: 16 hr
Issued by: NWS Gray, ME
Flood severity: None

Counties Franklin County, ME, Oxford County, ME, Somerset County, ME, Carroll County, NH, Coos County, NH, Grafton County, NH

The radar

The Portland,ME radar (KGYX), 93 km from the middle of the area, began a volume at 15:49 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

Gray, ME (KGYX), launched 12:00Z, 3.8 hours before the alert went out and 93 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1648 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 131 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 watch 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 watch went out at Jul 20, 10:06 AM EDT, 1 hour 40 minutes earlier.

Area forecast discussion, Jul 20, 10:06 AM EDT, 1 hour 40 minutes before

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Hazardous weather outlook, Jul 20, 3:20 AM EDT, 8 hours 26 minutes before

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In the hours before

Special weather statement, Jul 20, 10:19 AM EDT, 1 hour 27 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 20, 7:34 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack, Sullivan	56 min

Nearby

Flash Flood Watches in Maine, 2008 Flash Flood Watches in New Hampshire, 2008 Every flash flood watch in 2008

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.