Alert archive / New Hampshire / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 7, NWS Gray, ME

June 12, 1997Carroll County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jun 12, 1997, 1:56 PM EDT for Carroll County, New Hampshire. It was in force for 49 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: Jun 12, 1997, 1:56 PM EDT (17:56 UTC)
Expired: Jun 12, 1997, 2:45 PM EDT
In force: 49 min
Issued by: NWS Gray, ME
Area: Whole counties

County Carroll County, NH

The radar

The Portland,ME radar (KGYX), 76 km from the middle of the area, began a volume at 17:57 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
Jun 12, 2:00 PM EDT	Hail 0.75	North Conway, 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 12:00Z, 5.9 hours before the alert went out and 76 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 29 J/kg
Mixed-layer CIN: -285 J/kg
Mixed-layer LCL: 1603 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPWM 121759 RRA
SVRPWM
NHC003-121845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAY ME
156 PM EDT THU JUN 12 1997
 
THE NATIONAL WEATHER SERVICE IN GRAY HAS EXTENDED THE
SEVERE THUNDERSTORM WARNING UNTIL  245 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN  NEW HAMPSHIRE
 
   ...NORTHERN CARROLL COUNTY
 
DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER NORTHERN CARROLL
COUNTY IN BETWEEN THE TOWNS OF BARTLETT AND JACKSON.  THIS THUNDERSTORM
WAS MOVING EAST AT 15 MPH AND WILL BE ACCOMPANIED BY LARGE HAIL.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

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.

In the hours before

Local storm report, Jun 12, 11:42 AM EDT, 2 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAY MAINE
1143 AM EDT THU JUN 12 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1005 AM    BANGOR INTL ARPT          ME   .25 INCH HAIL
06/12/97   PENOBSCOT

1020 AM    BANGOR                    ME   1 INCH HAIL
06/12/97   PENOBSCOT

1055 AM    BANGOR                 &   ME   .75 INCH HAIL
06/12/97   PENOBSCOT

1118 AM    POLAND                    ME   .25 INCH HAIL
06/12/97   ANDROSCOGGIN

Local storm report, Jun 12, 11:43 AM EDT, 2 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAY MAINE
1143 AM EDT THU JUN 12 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1005 AM    BANGOR INTL ARPT          ME   .25 INCH HAIL
06/12/97   PENOBSCOT

1020 AM    BANGOR                    ME   1 INCH HAIL
06/12/97   PENOBSCOT

1055 AM    BANGOR                    ME   .75 INCH HAIL
06/12/97   PENOBSCOT

1118 AM    POLAND                    ME   .25 INCH HAIL
06/12/97   ANDROSCOGGIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 1:20 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	25 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 1997 Every severe thunderstorm warning in 1997

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.