Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 96, NWS Milwaukee, WI

June 30, 2000Rock County, Walworth County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jun 30, 2000, 3:32 PM CDT for Rock County, Walworth County, Wisconsin. It was in force for 58 min. 2 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: Jun 30, 2000, 3:32 PM CDT (20:32 UTC)
Expired: Jun 30, 2000, 4:30 PM CDT
In force: 58 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

Counties Rock County, WI, Walworth County, WI

The radar

The Milwaukee radar (KMKX), 39 km from the middle of the area, began a volume at 20:35 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 30, 3:45 PM CDT	Hail 0.75	Milton, WI
Jun 30, 3:50 PM CDT	Hail 0.75	Tibbet, 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

Davenport, (KDVN), launched 12:00Z, 8.5 hours before the alert went out and 182 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: 55 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1662 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

318 
WUUS53 KMKX 302032
SVRMKE
WIC105-127-302130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
332 PM CDT FRI JUN 30 2000

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN ROCK COUNTY IN SOUTH CENTRAL WISCONSIN
  WALWORTH COUNTY IN SOUTHEAST WISCONSIN

* UNTIL 430 PM CDT

* AT 332 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTHEAST OF MILTON...MOVING SOUTHEAST
  AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WHITEWATER AT 400 PM CDT.
  DELAVAN AT 430 PM CDT.

HAIL UP TO ONE INCH IN DIAMETER AND WINDS GREATER THAN 60 MILES AN
HOUR ARE EXPECTED FROM THIS STORM. SEEK SHELTER IN A STURDY STRUCTURE
UNTIL THE STORM HAS PASSED.

KAPELA

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 Milwaukee, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 2:20 PM CDT, 1 hour 12 minutes earlier.

Area forecast discussion, Jun 30, 2:20 PM CDT, 1 hour 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
220 PM CDT FRI JUN 30 2000

FCST FOCUS ON SCT STORMS INTO THE EVENING. THEN CLDS/TEMPS/PCPN THRU
SUNDAY.

WATER VAPOR IMAGERY SHOWS A BETTER THAN PROGD MID LEVEL S/W TWISTING
THRU SE MN/ERN IA/SW WI ATTM.  THIS HAS COMBINED WITH MSAS SFC
COMPUTED LI/S OF -4 TO -7 AND A CONVECTIVE TEMP OF 79 TO GENERATE
SOME HIGH BASED ISLD TO SCT STORMS.  MODELS DO PROG THIS S/W AXIS
TO ROTATE THRU THIS EVENING AND GIVEN TYPICAL DIURNAL EXPECTATIONS...
STORMS SHOULD FALL APART DURG THE EVENING.  WL CARRY SCT STORMS
EARLY TONIGHT.

SOUNDINGS SHOW SML POTENTIAL FOR MORE STORMS ON SAT. HIGHER
DWPNTS AND CNVCTV TEMP NEAR MID 80S...IF REACHED...CAPES SUPPORT
RAPID DVLPMNT. NOT MUCH IN THE MID LEVELS FOR SUPPORT...BUT MAY NOT
BE NEEDED.

GENERAL PATTERN THRU SUN HAS LOW PRES WELL TO THE WEST WITH A
NRLY STNRY FNT ACRS FAR NRN WI.  THAT BNDRY GRADUALLY WORKS S BY
SUN/SUN NGT BRINGING BETTER SUPPORT FOR PCPN. IN FACT...THAT
BNDRY/LW PRES WILL BE A PRBLM THRU JULY 4...BRINGING CHCY POPS INTO
EARLY NEXT WEEK.

NGM MOS HIGHS TOO HIGH...AVN TOO LOW...BLEND OF TWO MATCHES ETA 2-M
TEMPS WHICH HAVE PERFORMED WELL LATELY.

.UWNMS...LENDS SOME SUPPORT FOR SML POP ON SAT AS IT SHOWS SOME QPF
FOR SAT OVR WRN CWA IN AXIS OF MOISTURE AND INSTABILITY. 2M TEMPS
LOOK LIKE ETA AND ACCEPTED.

.MKX...NONE.
DAVIS

In the hours before

Local storm report, Jun 30, 3:16 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
316 PM CDT FRI JUN 30 2000

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

0242 PM    FT ATKINSON               WI   .88 INCH HAIL
06/30/00   JEFFERSON                      REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL
                                          JUST SOUTH OF FORT
                                          AKINSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 2:44 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Walworth	61 min
Jun 30, 4:25 PM CDT	Severe Thunderstorm Warning	MKX	Walworth	65 min
Jun 30, 5:27 PM CDT	Severe Thunderstorm Warning	MKX	Walworth	48 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2000 Every severe thunderstorm warning in 2000

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.