Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 43, NWS Gray, ME
NWS Gray, ME issued this severe thunderstorm warning at Aug 9, 2001, 9:50 PM EDT for Grafton County, New Hampshire. It was in force for 25 min. 4 reports 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
- Aug 9, 2001, 9:50 PM EDT (01:50 UTC)
- Expired
- Aug 9, 2001, 10:15 PM EDT
- In force
- 25 min
- Issued by
- NWS Gray, ME
- Area
- Whole counties
County Grafton County, NH
The radar
The Burlington radar (KCXX), 125 km from the middle of the area, began a volume at 01:52 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 9, 9:55 PM EDT | Thunderstorm Wind 50 E | Enfield, NH | |
| Aug 9, 10:05 PM EDT | Thunderstorm Wind 50 E | Canaan, NH | |
| Aug 9, 10:09 PM EDT | Thunderstorm Wind 50 E | West Thornton, NH | |
| Aug 9, 10:24 PM EDT | Thunderstorm Wind 50 E | Holderness, 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.
The nearest sounding before it
Gray, ME (KGYX), launched 00:00Z, 1.8 hours before the alert went out and 125 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
- 551 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 2293 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Aug 9, 8:40 PM EDT, 1 hour 10 minutes earlier.
Area forecast discussion, Aug 9, 8:40 PM EDT, 1 hour 10 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 840 PM EDT THU AUG 9 2001 SYNOPSIS...VERY WARM AND HUMID SOUTHWEST FLOW WILL REMAIN OVER THE FORECAST AREA TONIGHT AND FRIDAY. A STRONG COLD FRONT WILL SWEEP SOUTHEAST ACROSS THE AREA FRIDAY AFTERNOON AND EVENING. THE FRONT WILL BECOME STATIONARY OVER SOUTHERN NEW ENGLAND SATURDAY. ZONES...WILL UPDATE ZONES TO REMOVE MENTION OF HAIL...BUT WILL CONTINUE MENTION OF STRONG GUSTY WINDS WITH ANY THUNDERSTORMS OVERNIGHT. AT THIS TIME THE THUNDERSTORM CLUSTER OVER EAST CENTRAL NEW YORK AND SOUTHERN VERMONT IS THE PRIMARY CONCERN. THIS CLUSTER HAS A LONG HISTORY OF PRODUCING WIND DAMAGE ACROSS CENTRAL NEW YORK. CLUSTER IS TRACKING EAST AT 27 KTS AND LEADING EDGE WILL CROSS THE BORDER INTO SOUTHWEST NEW HAMPSHIRE AROUND 01Z. INCREASED POPS IN CENTRAL AND SOUTHEAST NEW HAMPSHIRE AND LOWERED POPS IN THE NORTHERN ZONES OVERNIGHT TO REFLECT CURRENT TRENDS. ALSO LOWERED OVERNIGHT MINIMUM TEMPERATURES IN SOME LOCATIONS BASED ON DEW POINTS. PWMWRKZFP AVAILABLE FOR COORDINATION. MARINE...SW WINDS COULD INCREASE TO MINIMAL SCA CRITERIA AHEAD OF THE FRONT FRIDAY AFTERNOON. PWMWRKCWF AVAILABLE FOR COORDINATION. FCSTID = 7 .GYX... ME...NONE. NH...NONE. WHEELER
The office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 11:00 PM EDT | Severe Thunderstorm Warning | GYX | Cumberland, Oxford, York | 45 min |
| Aug 9, 10:17 PM EDT | Severe Thunderstorm Warning | GYX | Carroll, Grafton | 43 min |
| Aug 10, 1:54 PM EDT | Severe Thunderstorm Warning | GYX | Rockingham | 51 min |
Nearby
Severe Thunderstorm Warnings in New Hampshire, 2001Every severe thunderstorm warning in 2001
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; radar from the NEXRAD Level II archive.