Heat in Wisconsin, June 30, 2002

Name: Heat in Wisconsin, June 30, 2002
Start: 2002-06-30T00:00
End: 2002-06-30T23:59
Location: Wisconsin

June 30, 2002 · NWS MKX · 20 events in 20 counties and zones

The last day of June 30, 2002, was the first of four consecutive days in south-central and southeast Wisconsin with maximum temperatures in the lower to mid 90s and overnight lows in the upper 60s to mid 70s, both about 10 to 15 degrees above normal. ) required first-aid treatment and one was taken to a local hospital for heat exhaustion.

Where it happened

Every event with a place to put it; 20 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

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The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 20

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS MKX wrote it up.

The last day of June 30, 2002, was the first of four consecutive days in south-central and southeast Wisconsin with maximum temperatures in the lower to mid 90s and overnight lows in the upper 60s to mid 70s, both about 10 to 15 degrees above normal. No deaths were reported, however, on June 30th, at least 150 people at Milwaukee's Sumerfest (Milwaukee Co.) required first-aid treatment and one was taken to a local hospital for heat exhaustion. At least 6 people in the Madison (Dane Co.) area required medical treatment at local hospitals. Milwaukee Mitchell Field recorded a maximum of 95 on June 30th, while Madison came in with 93. Heat index values on June 30th peaked in the 95 to 104 range, thanks to surface dewpoints in the upper 60s to lower 70s.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Jun 29, 1:15 PM CST, 10 hours 45 minutes earlier.

Area forecast discussion, Jun 29, 1:15 PM CST, 10 hours 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
215 PM CDT SAT JUN 29 2002

MAIN FORECAST PROBLEM IS TEMPERATURES BECOMING VERY WARM TO HOT
UNTIL TUESDAY.  HEAT INDICES WILL BECOME AN ISSUE...BUT SHOULD BE
JUST BELOW ADVISORY CRITERIA SUNDAY. ONLY LIMITED LAKE BREEZE
RELIEF...VERY CLOSE TO THE LAKE.

SHORT TERM...
TEMPERATURES SHOULD REACH LOWER 90S SUNDAY AND MONDAY.  HEAT INDICES
INTO MID 90S SUNDAY...AND MID TO UPPER 90S MONDAY AS DEW POINTS RISE
TO NEAR 70.  SOUTH LOW LEVEL FLOW SHOULD BE ABLE TO TAP THE HIGHER
SEW POINT AIR...SEEN ON SATELLITE WITH MORE EXTENSIVE CU FIELD.

SATELLITE IMAGES CONTINUES TO SHOW SMOKE ALOFT ACROSS THE FORECAST
AREA CAUSING HAZY SKIES.  SMOKE ALOFT FROM CANADIAN FOREST FIRES
...BUT IT IS THINNING AS WINDS UNFAVORABLE FOR ADDED TRANSPORT.

LAKE BREEZE CONFINED TO AREAS WITHIN 5 MI OF SHORE...EXCEPT IN THE
SHEBOYGAN AREA...BUT SHOULD PUSH INLAND MORE LATE THIS AFTERNOON.

SOME 1-3 MI VSBYS IN FOG POSSIBLE LATE MAINLY IN RIVER VALLEYS...
ESPECIALLY THE WI RIVER VALLEY...BUT NOT DENSE ENOUGH FOR A MENTION.

ETA MODEL SHOWS A RATHER STABLE LAYER FROM 2 TO  KM...WITH MIXED
UNSTABLE LAYER BELOW.  ONLY SCATTERED FLAT CU FORMED DUE TO THE CAP.
ETA FORECAST SOUNDINGS SHOW CAPES AROUND 4500 J/KG.  HOWEVER THEY
HAVE A RATHER STRONG CAP AT 3 KM...AND ARE OVER FORECASTING DEW
POINTS.  ALSO CURRENT RUC SOUNDINGS SHOW CAP IS STRONGER THAN ETA
FORECAST.  AS SUCH GIVEN WEAK DYNAMICS CAP TOO STRONG FOR ANY DEEP
MOIST CONVECTION.  ALSO UPPER FLOW SHOULD KEEP ANY N PLAINS
THUNDERSTORMS TO OUR NORTH AS THEY ROL E WITH UPPER JET.

MID RANGE
SHORT WAVE PUSHES ACROSS CANADA TAKING FLOW ZONAL ACROSS N TIER OF
U.S. MONDAY NIGHT.  AVN MODEL SHOWS TAIL OF RH AND WEAK FRONT TRYING
TO REACH S WI.  BEST CHC OF THUNDERSTORMS...AND THEN ONLY AROUND 30
POP WOULD BE TUESDAY AS WEAK COLD FRONT PUSHES THROUGH.

SECONDARY SHORTWAVE DIGS TROUGH OVER EAST...WITH UPPER RIDGE MORE
ACROSS N PLAINS.  AS A RESULT HOT WEATHER SHOULD BUILD MORE OVER THE
PLAINS...WITH WARM TEMPERATURES OVER S WI.

MKX...NONE.

HENTZ

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

20 heat. Local standard time, as filed.

Heat, Marquette

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Marquette forecast zone
Reported by: NEWSPAPER
Coordinates: 43.820, -89.399 (the zone’s center; the record gives no point)

Heat, Green Lake

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Green Lake forecast zone
Reported by: NEWSPAPER
Coordinates: 43.800, -89.045 (the zone’s center; the record gives no point)

Heat, Fond du Lac

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Fond du Lac forecast zone
Reported by: NEWSPAPER
Coordinates: 43.754, -88.488 (the zone’s center; the record gives no point)

Heat, Sheboygan

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Sheboygan forecast zone
Reported by: NEWSPAPER
Coordinates: 43.756, -87.800 (the zone’s center; the record gives no point)

Heat, Sauk

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Sauk forecast zone
Reported by: NEWSPAPER
Coordinates: 43.427, -89.948 (the zone’s center; the record gives no point)

Heat, Columbia

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Columbia forecast zone
Reported by: NEWSPAPER
Coordinates: 43.467, -89.334 (the zone’s center; the record gives no point)

Heat, Dodge

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Dodge forecast zone
Reported by: NEWSPAPER
Coordinates: 43.416, -88.707 (the zone’s center; the record gives no point)

Heat, Washington

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Washington forecast zone
Reported by: NEWSPAPER
Coordinates: 43.369, -88.231 (the zone’s center; the record gives no point)

Heat, Ozaukee

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Ozaukee forecast zone
Reported by: NEWSPAPER
Coordinates: 43.403, -87.891 (the zone’s center; the record gives no point)

Heat, Iowa

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Iowa forecast zone
Reported by: NEWSPAPER
Coordinates: 43.001, -90.135 (the zone’s center; the record gives no point)

Heat, Dane

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Dane forecast zone
Reported by: NEWSPAPER
Coordinates: 43.067, -89.418 (the zone’s center; the record gives no point)

Heat, Jefferson

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Jefferson forecast zone
Reported by: NEWSPAPER
Coordinates: 43.021, -88.776 (the zone’s center; the record gives no point)

Heat, Waukesha

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Waukesha forecast zone
Reported by: NEWSPAPER
Coordinates: 43.018, -88.304 (the zone’s center; the record gives no point)

Heat, Milwaukee

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Milwaukee forecast zone
Reported by: NEWSPAPER
Coordinates: 43.022, -87.929 (the zone’s center; the record gives no point)

Heat, Lafayette

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Lafayette forecast zone
Reported by: NEWSPAPER
Coordinates: 42.661, -90.132 (the zone’s center; the record gives no point)

Heat, Green

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Green forecast zone
Reported by: NEWSPAPER
Coordinates: 42.680, -89.602 (the zone’s center; the record gives no point)

Heat, Rock

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Rock forecast zone
Reported by: NEWSPAPER
Coordinates: 42.671, -89.072 (the zone’s center; the record gives no point)

Heat, Walworth

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Walworth forecast zone
Reported by: NEWSPAPER
Coordinates: 42.669, -88.542 (the zone’s center; the record gives no point)

Heat, Racine

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Racine forecast zone
Reported by: NEWSPAPER
Coordinates: 42.730, -87.812 (the zone’s center; the record gives no point)

Heat, Kenosha

When: June 30, 12:00 AM CST to 11:59 PM CST
Where: Kenosha forecast zone
Reported by: NEWSPAPER
Coordinates: 42.573, -87.840 (the zone’s center; the record gives no point)

What these are

Heat: Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Wisconsin in 2002 Every state in 2002 This day in weather history Warnings in Wisconsin, June 2002

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5308598, 5308599, 5308600, 5308601, 5308602, 5308603, 5308604, 5308605, 5308606, 5308607, 5308608, 5308609, 5308610, 5308681, 5308682, 5308683, 5308684, 5308685, 5308686, 5308687.