Alert archive / New Hampshire / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 19, NWS Gray, ME

October 18, 1990Hillsborough County, Merrimack County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Oct 18, 1990, 10:19 PM EDT for Hillsborough County, Merrimack County, New Hampshire. It was in force for 56 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Oct 18, 1990, 10:19 PM EDT (02:19 UTC)
Expired
Oct 18, 1990, 11:15 PM EDT
In force
56 min
Issued by
NWS Gray, ME
Area
Whole counties

Counties Hillsborough County, NH, Merrimack County, NH

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Oct 18, 11:00 PM EDTThunderstorm Wind 0Merrimack, NH

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Chatham, MA (KCHH), launched 00:00Z, 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.

Skew-T log-pSkew-T log-p diagram, Chatham, MA at 00:00Z on 1990-10-19Temperature 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, Chatham, MA at 00:00Z on 1990-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 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
1118 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
172 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 18, 10:32 PM EDTSevere Thunderstorm WarningGYXHillsborough, Merrimack58 min
Oct 18, 11:19 PM EDTSevere Thunderstorm WarningGYXOxford, York56 min
Oct 18, 11:43 PM EDTSevere Thunderstorm WarningGYXCumberland62 min
Oct 19, 12:22 AM EDTSevere Thunderstorm WarningGYXAndroscoggin68 min
Oct 19, 12:43 AM EDTSevere Thunderstorm WarningGYXCumberland62 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 1990Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.