Alert archive / New Hampshire / Flash Flood Warnings in 1996

Flash Flood Warning 17, NWS Gray, ME

October 21, 1996Belknap County, Grafton County, Merrimack County, New Hampshire

NWS Gray, ME issued this flash flood warning at Oct 21, 1996, 11:07 AM EDT for Belknap County, Grafton County, Merrimack County, New Hampshire. It was in force for 9 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
Oct 21, 1996, 11:07 AM EDT (15:07 UTC)
Expired
Oct 21, 1996, 8:00 PM EDT
In force
9 hr
Issued by
NWS Gray, ME
Area
Whole counties

Counties Belknap County, NH, Grafton County, NH, Merrimack County, NH

The radar

The Portland,ME radar (KGYX), 116 km from the middle of the area, began a volume at 15:07 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, 3.1 hours before the alert went out and 116 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-pSkew-T log-p diagram, Gray, ME at 12:00Z on 1996-10-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Gray, ME at 12:00Z on 1996-10-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 456 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
490 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
456 m²/s²
0-3 km storm-relative helicity
590 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 20, 11:06 PM EDTFlash Flood WarningGYXBelknap, Carroll, Strafford5 hr
Oct 21, 3:40 AM EDTFlash Flood WarningGYXBelknap, Carroll, Merrimack, Strafford8 hr
Oct 21, 3:40 AM EDTFlash Flood WarningGYXRockingham8 hr
Oct 21, 6:55 AM EDTFlash Flood WarningGYXGrafton5 hr
Oct 21, 11:07 AM EDTFlash Flood WarningGYXCarroll, Strafford9 hr
Oct 21, 11:07 AM EDTFlash Flood WarningGYXRockingham9 hr
Oct 21, 3:15 PM EDTFlash Flood WarningGYXBelknap, Carroll, Merrimack, Rockingham, Strafford8 hr
Oct 21, 3:15 PM EDTFlash Flood WarningGYXGrafton8 hr
Oct 21, 3:33 PM EDTFlash Flood WarningGYXCoos12 hr
Oct 20, 11:06 PM EDTFlash Flood WarningGYXYork5 hr
Oct 21, 3:40 AM EDTFlash Flood WarningGYXCumberland, York8 hr
Oct 21, 3:33 PM EDTFlash Flood WarningGYXAndroscoggin, Cumberland, Sagadahoc, York12 hr

Nearby

Flash Flood Warnings in New Hampshire, 1996Every flash flood warning in 1996

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.