Alert archive / New Hampshire / Flash Flood Watches in 2019
Flash Flood Watch 2, NWS Gray, ME
NWS Gray, ME issued this flash flood watch at Aug 17, 2019, 11:33 AM EDT for Coos County, Grafton County, New Hampshire. It took effect at Aug 17, 2019, 5:00 PM EDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Aug 17, 2019, 11:33 AM EDT (15:33 UTC)
- In effect from
- Aug 17, 2019, 5:00 PM EDT
- Expired
- Aug 17, 2019, 10:11 PM EDT
- In force
- 5 hr
- Issued by
- NWS Gray, ME
- Flood severity
- None
Counties Coos County, NH, Grafton County, NH
The radar
The Portland,ME radar (KGYX), 114 km from the middle of the area, began a volume at 15:33 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, 3.6 hours before the alert went out and 257 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
- 149 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 787 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 Aug 17, 9:21 AM EDT, 2 hours 12 minutes earlier.
Area forecast discussion, Aug 17, 9:21 AM EDT, 2 hours 12 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 17, 5:40 AM EDT | Areal Flood Advisory | GYX | Franklin, Somerset | 65 min |
| Aug 17, 7:07 PM EDT | Special Weather Statement | GYX | Grafton, Sullivan | 53 min |
| Aug 17, 7:26 PM EDT | Severe Thunderstorm Warning | GYX | Grafton, Merrimack, Sullivan | 49 min |
| Aug 17, 7:36 PM EDT | Severe Thunderstorm Warning | GYX | Cheshire | 54 min |
Nearby
Flash Flood Watches in New Hampshire, 2019Every flash flood watch in 2019
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.