Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 40, NWS Green Bay, WI

July 16, 1997Vilas County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 16, 1997, 12:30 PM CDT for Vilas County, Wisconsin. It was in force for 75 min. 3 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: Jul 16, 1997, 12:30 PM CDT (17:30 UTC)
Expired: Jul 16, 1997, 1:45 PM CDT
In force: 75 min
Issued by: NWS Green Bay, WI
Area: Whole counties

County Vilas County, WI

What was reported inside it

Time	Report	Where
Jul 16, 12:55 PM CDT	Hail 1.75	Lac Du Flambeau, WI
Jul 16, 1:00 PM CDT	Thunderstorm Wind	Lac Du Flambeau, WI
Jul 16, 1:20 PM CDT	Hail 0.88	St Germain, WI

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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 5.5 hours before the alert went out and 207 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: 2398 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 948 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGRB 161730 RRA
SVRGRB
WIC125-161845-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
1230 PM CDT WED JUL 16 1997

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHERN VILAS COUNTY - NORTH CENTRAL WISCONSIN

* UNTIL 145 PM CDT
 
* SOME LOCATIONS AFFECTED
  LAC DU FLAMBEAU
  ARBOR VITAE

* AT 1230 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES NORTHWEST OF LAC DU FLAMBEAU. THE
  STORM WAS MOVING EAST AT 20 MPH.

* THE STORM WILL BE OVER LAC DU FLAMBEAU BY 1240 PM...AND ARBOR
  VITAE BY 115 PM.

THIS STORM CONTAINS HAIL UP TO ONE INCH IN DIAMETER...AND
POTENTIAL WIND GUSTS TO 60 MPH. MOVE TO A STURDY SHELTER.

JKL/EB4

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 Green Bay, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 16, 10:57 AM CDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jul 16, 10:57 AM CDT, 1 hour 33 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
1055 AM CDT WED JUL 16 1997

TSTMS CONT TO FIRE ALONG DEVELOPING QUASI-STNRY FNT DRAPED ACROSS NRN WI
LATE THIS MORNING. DEW PTS OF 70+ WERE POOLING ALONG THE FNT WITH MORE
WARM AND MOIST AIR ON THE WAY. 12Z GRB SNDNG PROVIDE A CAPE OF 3000 J/KG
AND A LI OF -7. MODIFYING THIS SNDNG USING A 90 TEMP AND 70 DEW PTS SENDS
THE CAPE TO ALMOST 4100 J/KG AND LI'S DOWN TO -9. EXPECT TSTMS TO CONT
THRU THE AFTERNOON ACROSS NRN WI WITH GUSTY WNDS...SMALL HAIL AND BRIEF
HVY RAINFALL.

ALSO DROPPED MAX TEMPS DOWN A BIT CONSIDERING PCPN AND MORE CLDS THAN
ORIGINALLY ANTICIPATED.

SPC HAS PLACED THE WRN SECTIONS OF WI UNDER A MDT RISK OF SVR XFOR LTR
TNGT WITH A SLGT RISK FOR THE REMAINDER OF THE STATE. WL EVALUATE COMPLETE
12Z PACKAGE AND UPDATE MORE ON THIS IN THE AFTERNOON DISC.

KALLAS

In the hours before

Local storm report, Jul 16, 7:56 AM CDT, 4 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
755 AM CDT WED JUL 16 1997

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

0706 AM    ST. GERMAIN               WI   WIND DAMAGE
07/16/97   VILAS                          SEVERAL TREES DOWN.
                                          REPOERTED BY STORM SPOTTER.

SANDERSl

Local storm report, Jul 16, 8:09 AM CDT, 4 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
755 AM CDT WED JUL 16 1997

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

0706 AM    ST. GERMAIN               WI   WIND DAMAGE
07/16/97   VILAS                          SEVERAL TREES DOWN.
                                          REPORTED BY STORM SPOTTER.

SANDERS

Local storm report, Jul 16, 8:10 AM CDT, 4 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
810 AM CDT WED JUL 16 1997

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

0740 AM    THREE LAKES               WI   .88 INCH HAIL
07/16/97   ONEIDA                         NICKEL SIZED HAIL

SANDERS

Local storm report, Jul 16, 8:11 AM CDT, 4 hours 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
810 AM CDT WED JUL 16 1997

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

0740 AM    THREE LAKES               WI   .88 INCH HAIL
07/16/97   ONEIDA                         NICKEL SIZED HAIL

SANDERS

Special weather statement, Jul 16, 11:55 AM CDT, 35 minutes before

WIZ005-010>013-018>022-030-031-035>040-045-048>050-162100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREEN BAY WI
1155 AM CDT WED JUL 16 1997

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND PARTS OF CENTRAL
AND NORTH-CENTRAL WISCONSIN.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS FAR NORTHERN AND
NORTHEASTERN WISCONSIN THIS AFTERNOON...AND ACROSS THE ENTIRE AREA
TONIGHT.

FORECAST:
SCATTERED THUNDERSTORMS WILL MOVE THROUGH AREAS NEAR THE UPPER MICHIGAN
BORDER THIS AFTERNOON. A FEW OF THESE STORMS COULD PRODUCE WIND GUSTS TO
60 MPH AND HAIL TO 1 INCH IN DIAMETER. CENTRAL AND EAST-CENTRAL PORTIONS
OF THE STATE SHOULD REMAIN DRY THIS AFTERNOON.

SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS THE ENTIRE FORECAST AREA
OVERNIGHT. THESE STORMS MAY BECOME SEVERE WITH THE PRIMARY THREAT BEING
DAMAGING WINDS...ALTHOUGH SOME LARGE HAIL WILL ALSO BE POSSIBLE.

DISCUSSION:
A STRONG WESTERLY FLOW IN THE UPPER LEVELS OF THE ATMOSPHERE WILL
CONTINUE TO BRING UPPER LEVEL DISTURBANCES ACROSS THE UPPER GREAT LAKES
REGION THIS AFTERNOON AND TONIGHT. A FRONTAL BOUNDARY REMAINS DRAPED
ACROSS EXTREME NORTHERN WISCONSIN THIS AFTERNOON AND WILL INTERACT WITH
VERY UNSTABLE AIR TO INDUCE STRONG THUNDERSTORM DEVELOPMENT. THE THREAT
OF THUNDERSTORMS ARE EXPECTED TO ENCOMPASS CENTRAL AND EAST-CENTRAL
WISCONSIN BY TONIGHT AS MORE THUNDERSTORMS DEVELOP ACROSS THE NORTHERN
PLAINS AND MOVE TO THE EAST-SOUTHEAST.

SPOTTER ACTION:
SPOTTER ACTIVATION MAY BE NEEDED ACROSS FAR NORTHERN WISCONSIN TODAY OR
TONIGHT...AND ACROSS THE ENTIRE AREA TONIGHT.

UPDATED WEATHER INFORMATION IS AVAILABLE IN THE SHORT-TERM FORECAST.

KALLAS

Special weather statement, Jul 16, 11:58 AM CDT, 32 minutes before

WIZ005-010>013-018>022-030-031-035>040-045-048>050-162100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREEN BAY WI
1155 AM CDT WED JUL 16 1997

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND PARTS OF CENTRAL
AND NORTH-CENTRAL WISCONSIN.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS FAR NORTHERN AND
NORTHEASTERN WISCONSIN THIS AFTERNOON...AND ACROSS THE ENTIRE AREA
TONIGHT.

FORECAST:
SCATTERED THUNDERSTORMS WILL MOVE THROUGH AREAS NEAR THE UPPER MICHIGAN
BORDER THIS AFTERNOON. A FEW OF THESE STORMS COULD PRODUCE WIND GUSTS TO
60 MPH AND HAIL TO 1 INCH IN DIAMETER. CENTRAL AND EAST-CENTRAL PORTIONS
OF THE STATE SHOULD REMAIN DRY THIS AFTERNOON.

SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS THE ENTIRE FORECAST AREA
OVERNIGHT. THESE STORMS MAY BECOME SEVERE WITH THE PRIMARY THREAT BEING
DAMAGING WINDS...ALTHOUGH SOME LARGE HAIL WILL ALSO BE POSSIBLE.

DISCUSSION:
A STRONG WESTERLY FLOW IN THE UPPER LEVELS OF THE ATMOSPHERE WILL
CONTINUE TO BRING UPPER LEVEL DISTURBANCES ACROSS THE UPPER GREAT LAKES
REGION THIS AFTERNOON AND TONIGHT. A FRONTAL BOUNDARY REMAINS DRAPED
ACROSS EXTREME NORTHERN WISCONSIN THIS AFTERNOON AND WILL INTERACT WITH
VERY UNSTABLE AIR TO INDUCE STRONG THUNDERSTORM DEVELOPMENT. THE THREAT
OF THUNDERSTORMS ARE EXPECTED TO ENCOMPASS CENTRAL AND EAST-CENTRAL
WISCONSIN BY TONIGHT AS MORE THUNDERSTORMS DEVELOP ACROSS THE NORTHERN
PLAINS AND MOVE TO THE EAST-SOUTHEAST.

SPOTTER ACTIO&N:
SPOTTER ACTIVATION MAY BE NEEDED ACROSS FAR NORTHERN WISCONSIN TODAY OR
TONIGHT...AND ACROSS THE ENTIRE AREA TONIGHT.

UPDATED WEATHER INFORMATION IS AVAILABLE IN THE SHORT-TERM FORECAST.

KALLAS

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 16, 6:49 AM CDT	Severe Thunderstorm Warning	GRB	Oneida, Vilas	61 min
Jul 16, 1:05 PM CDT	Severe Thunderstorm Warning	GRB	Oneida	75 min
Jul 16, 1:56 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Oneida	79 min
Jul 16, 2:08 PM CDT	Tornado Warning	GRB	Oneida	47 min
Jul 16, 2:20 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	80 min
Jul 16, 2:31 PM CDT	Severe Thunderstorm Warning	GRB	Langlade	74 min
Jul 16, 3:10 PM CDT	Tornado Warning	GRB	Lincoln	35 min
Jul 16, 3:15 PM CDT	Tornado Warning	GRB	Langlade	35 min
Jul 16, 3:29 PM CDT	Tornado Warning	GRB	Marathon	46 min
Jul 16, 3:43 PM CDT	Severe Thunderstorm Warning	GRB	Menominee	47 min
Jul 16, 3:52 PM CDT	Tornado Warning	GRB	Shawano	48 min
Jul 16, 3:59 PM CDT	Tornado Warning	GRB	Menominee	36 min
Jul 16, 4:11 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	79 min
Jul 16, 4:14 PM CDT	Tornado Warning	GRB	Marathon	36 min
Jul 16, 4:37 PM CDT	Tornado Warning	GRB	Portage, Waupaca	48 min
Jul 16, 4:40 PM CDT	Tornado Warning	GRB	Shawano	35 min
Jul 16, 4:50 PM CDT	Tornado Warning	GRB	Portage, Wood	45 min
Jul 16, 4:56 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Outagamie	79 min
Jul 16, 5:06 PM CDT	Severe Thunderstorm Warning	GRB	Waushara	79 min
Jul 16, 5:25 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Winnebago	65 min
Jul 16, 5:39 PM CDT	Tornado Warning	GRB	Waushara	36 min
Jul 16, 6:00 PM CDT	Severe Thunderstorm Warning	GRB	Manitowoc	80 min
Jul 16, 6:26 PM CDT	Severe Thunderstorm Warning	GRB	Waushara	64 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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.