Alert archive / New Hampshire / Flash Flood Warnings in 2008
Flash Flood Warning 15, NWS Gray, ME
NWS Gray, ME issued this flash flood warning at Aug 11, 2008, 10:15 AM EDT for Grafton 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
- Aug 11, 2008, 10:15 AM EDT (14:15 UTC)
- Expired
- Aug 11, 2008, 1:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Gray, ME
- Area
- Storm-based polygon
- Flood severity
- None
County Grafton County, NH
The radar
The Burlington radar (KCXX), 125 km from the middle of the area, began a volume at 14:16 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, 2.3 hours before the alert went out and 214 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
- 496 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 Aug 11, 8:57 AM EDT, 1 hour 18 minutes earlier.
Area forecast discussion, Aug 11, 8:57 AM EDT, 1 hour 18 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 |
|---|---|---|---|---|
| Aug 10, 8:56 PM EDT | Areal Flood Advisory | GYX | Franklin, Oxford | 109 min |
| Aug 10, 9:17 PM EDT | Areal Flood Advisory | GYX | Franklin | 118 min |
| Aug 11, 5:49 AM EDT | Areal Flood Advisory | GYX | Carroll | 116 min |
| Aug 11, 6:21 AM EDT | Areal Flood Advisory | GYX | Strafford | 84 min |
| Aug 11, 7:11 AM EDT | Flash Flood Warning | GYX | Carroll | 109 min |
| Aug 11, 8:34 AM EDT | Flash Flood Watch | GYX | Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more | 13 hr |
| Aug 11, 9:07 AM EDT | Areal Flood Warning | GYX | Carroll, Strafford | 4 hr |
| Aug 11, 12:47 PM EDT | Areal Flood Advisory | GYX | Coos | 3 hr |
Nearby
Flash Flood Warnings in New Hampshire, 2008Every flash flood warning 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.