Alert archive / Iowa / Heat Advisories in 2018

Heat Advisory 1, NWS Des Moines, IA

May 27, 2018Dallas County, Polk County, Warren County, Iowa

NWS Des Moines, IA issued this heat advisory at May 27, 2018, 3:51 AM CDT for Dallas County, Polk County, Warren County, Iowa. It took effect at May 27, 2018, 1:00 PM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
May 27, 2018, 3:51 AM CDT (08:51 UTC)
In effect from
May 27, 2018, 1:00 PM CDT
Expired
May 27, 2018, 8:00 PM CDT
In force
7 hr
Issued by
NWS Des Moines, IA

Counties Dallas County, IA, Polk County, IA, Warren County, IA

The radar

The Des Moines radar (KDMX), 18 km from the middle of the area, began a volume at 08:55 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 forecasters said that day

The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this heat advisory went out at May 27, 3:33 AM CDT, 18 minutes earlier.

Area forecast discussion, May 27, 3:33 AM CDT, 18 minutes before
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Hazardous weather outlook, May 26, 3:08 PM CDT, 12 hours 43 minutes before
Hazardous Weather Outlook
National Weather Service Des Moines IA
308 PM CDT Sat May 26 2018

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-272015-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
308 PM CDT Sat May 26 2018

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

Hot conditions will continue into the early evening hours with
maximum heat index values in the 90s. Isolated thunderstorms are
also possible east of I-35 through early evening. The threat for
severe weather is low, but a few strong wind gusts and small hail
are possible.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Unseasonably hot and somewhat humid conditions are expected to
continue through the Memorial Day Weekend into early next week
with maximum heat index values in the 90s. With this being the
first significant heatwave of the season, this could lead to heat
related impacts if precautions are not taken.

Thunderstorms are forecast Tuesday into Wednesday. The threat for
severe weather is low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

Nearby

Heat Advisories in Iowa, 2018Every heat advisory in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.