Alert archive / Vermont / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 50, NWS Burlington, VT

August 22, 1997Grand Isle County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Aug 22, 1997, 6:16 PM EDT for Grand Isle County, Vermont. It was in force for 59 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: Aug 22, 1997, 6:16 PM EDT (22:16 UTC)
Expired: Aug 22, 1997, 7:15 PM EDT
In force: 59 min
Issued by: NWS Burlington, VT
Area: Whole counties

County Grand Isle County, VT

The radar

The Burlington radar (KCXX), 33 km from the middle of the area, began a volume at 22:17 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 22, 7:12 PM EDT	Hail 0.75	South Hero, VT

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

Albany, NY (KALY), launched 12:00Z, 10.3 hours before the alert went out and 238 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 469 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 58 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.

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 Burlington, VT wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 22, 1:47 PM EDT, 4 hours 29 minutes earlier.

Area forecast discussion, Aug 22, 1:47 PM EDT, 4 hours 29 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BURLINGTON VT
145 PM EDT FRI AUG 22 1997

STACKED LOW WL SLWLY MV TO N OVR NGT BUT NO REAL IMPRVMNT FOR FA
UNTL SUN WHEN MSTR FINALLY BEGINS LIFTING NWD AS WELL.

CHC OF SHWRS WL CONT THRU SAT WITH CHC FOR AFTN TSTMS AGAIN...BUT
SHUD BE ABLE TO DROP MNTN OF PCPN BY TMRW EVE.  SHUD SEE SOME BKS
AGAIN TMRW TO HELP KICK OFF SHWRS.

FWC TEMPS SEEM RSNBL THRU TMRW NGT BUT A BIT HIGH FOR SUN...ESP AT
&BTV.

MCGILL

In the hours before

Local storm report, Aug 22, 5:17 PM EDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VERMONT
517 PM EDT FRI AUG 22 1997

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

0510 PM    CHURUBUSCO                NY   1.75 INCH HAIL
08/22/97   CLINTON

Local storm report, Aug 22, 5:18 PM EDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VERMONT
517 PM EDT FRI AUG 22 1997

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

0*510 PM    CHURUBUSCO                NY   1.75 INCH HAIL
08/22/97   CLINTON

The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 22, 7:19 PM EDT	Severe Thunderstorm Warning	BTV	Orange	56 min
Aug 22, 7:32 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Grand Isle	58 min
Aug 22, 5:03 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Franklin	57 min
Aug 22, 5:55 PM EDT	Severe Thunderstorm Warning	BTV	Clinton	50 min

Nearby

Severe Thunderstorm Warnings in Vermont, 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.