Excessive Heat and Heat in Wisconsin, June 29 to 30, 2018

Name: Excessive Heat and Heat in Wisconsin, June 29 to 30, 2018
Start: 2018-06-29T11:00
End: 2018-06-30T23:59
Location: Wisconsin

June 29 to 30, 2018 · NWS MKX · 20 events in 20 counties and zones

Two to three days of hot and humid conditions produced heat index values in the 100's. Numerous cooling centers were opened by local communities throughout southern WI.

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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Fire, smoke and dust
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Open the live radar over this ground

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.

Two to three days of hot and humid conditions produced heat index values in the 100's. Numerous cooling centers were opened by local communities throughout southern WI. Some public swimming pools hours were extended due to the heat.

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, 8:40 AM CST, 2 hours 20 minutes earlier.

Area forecast discussion, Jun 29, 8:40 AM CST, 2 hours 20 minutes before

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Hazardous weather outlook, Jun 29, 2:50 AM CST, 8 hours 10 minutes before

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The radar

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

Open the radar archive at this moment

Event by event

18 excessive heat, 2 heat. Local standard time, as filed.

Excessive Heat, Milwaukee

When: June 29, 11:00 AM CST to June 30, 11:59 PM CST
Where: Milwaukee forecast zone
Reported by: Mesonet
Coordinates: 43.022, -87.929 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 117 degrees.

Excessive Heat, Racine

When: June 29, 11:00 AM CST to June 30, 11:59 PM CST
Where: Racine forecast zone
Reported by: Mesonet
Coordinates: 42.730, -87.812 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 110 degrees.

Excessive Heat, Kenosha

When: June 29, 11:00 AM CST to June 30, 11:59 PM CST
Where: Kenosha forecast zone
Reported by: Mesonet
Coordinates: 42.573, -87.840 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 110 degrees.

Excessive Heat, Walworth

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Walworth forecast zone
Reported by: Mesonet
Coordinates: 42.669, -88.542 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 114 degrees.

Excessive Heat, Rock

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Rock forecast zone
Reported by: Mesonet
Coordinates: 42.671, -89.072 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 110 degrees.

Excessive Heat, Green

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Green forecast zone
Reported by: Mesonet
Coordinates: 42.680, -89.602 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 113 degrees.

Excessive Heat, Lafayette

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Lafayette forecast zone
Reported by: Mesonet
Coordinates: 42.661, -90.132 (the zone’s center; the record gives no point)

Heat index values ranging from 105 to 112 degrees.

Excessive Heat, Iowa

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Iowa forecast zone
Reported by: Mesonet
Coordinates: 43.001, -90.135 (the zone’s center; the record gives no point)

Heat index values ranging from 105 to 112 degrees.

Excessive Heat, Sauk

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Sauk forecast zone
Reported by: Mesonet
Coordinates: 43.427, -89.948 (the zone’s center; the record gives no point)

Heat index values ranging from 105 to 110 degrees.

Excessive Heat, Dane

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Dane forecast zone
Reported by: Mesonet
Coordinates: 43.067, -89.418 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 118 degrees.

Excessive Heat, Columbia

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Columbia forecast zone
Reported by: Mesonet
Coordinates: 43.467, -89.334 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 110 degrees.

Excessive Heat, Jefferson

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Jefferson forecast zone
Reported by: Mesonet
Coordinates: 43.021, -88.776 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 110 degrees.

Excessive Heat, Dodge

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Dodge forecast zone
Reported by: Mesonet
Coordinates: 43.416, -88.707 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 118 degrees.

Excessive Heat, Washington

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Washington forecast zone
Reported by: Mesonet
Coordinates: 43.369, -88.231 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 116 degrees.

Excessive Heat, Fond du Lac

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Fond du Lac forecast zone
Reported by: Mesonet
Coordinates: 43.754, -88.488 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 110 degrees.

Excessive Heat, Green Lake

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Green Lake forecast zone
Reported by: Mesonet
Coordinates: 43.800, -89.045 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 110 degrees.

Excessive Heat, Marquette

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Marquette forecast zone
Reported by: Mesonet
Coordinates: 43.820, -89.399 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 110 degrees.

Excessive Heat, Waukesha

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Waukesha forecast zone
Reported by: Mesonet
Coordinates: 43.018, -88.304 (the zone’s center; the record gives no point)

Heat index values ranging from 100 to 115 degrees.

Heat, Sheboygan

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Sheboygan forecast zone
Reported by: Mesonet
Coordinates: 43.756, -87.800 (the zone’s center; the record gives no point)

Heat index values of 98 to 117 degrees.

Heat, Ozaukee

When: June 29, 11:00 AM CST to June 30, 9:00 PM CST
Where: Ozaukee forecast zone
Reported by: Mesonet
Coordinates: 43.403, -87.891 (the zone’s center; the record gives no point)

Heat index values of 98 to 110 degrees.

What these are

Excessive Heat: Heat at or above the local excessive heat warning criteria, or heat that caused deaths.
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 2018 Every state in 2018 This day in weather history Warnings in Wisconsin, June 2018

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 2026-09-30. Each event’s entry at NCEI: 761648, 761650, 761654, 761661, 761663, 761664, 761671, 761672, 761674, 761676, 761677, 761679, 761681, 761683, 761686, 761690, 761691, 761695, 761706, 761707.