Weather
Des Moines, IA Winter: 3 Words Could Mean Extreme Danger in Iowa
Des Moines, IA – Three words appearing in a winter weather warning could signal a storm far more dangerous than the snow, ice and freezing temperatures Iowa residents experience every year. During the
By Dylan Reeves · 2026-11-03T12:00:06.271Z
Des Moines, IA – Three words appearing in a winter weather warning could signal a storm far more dangerous than the snow, ice and freezing temperatures Iowa residents experience every year. During the 2026 27 winter season, those words could carry an urgent message from Des Moines to Cedar Rapids, Davenport and Sioux City.
According to NOAA's Weather Prediction Center, the National Weather Service is expanding the use of "Particularly Dangerous Situation," or PDS, wording in select Blizzard Warnings and Ice Storm Warnings.
The wording is intended for rare, exceptionally dangerous storms threatening lives, transportation and critical infrastructure.
What Are the Three Words Iowa Residents Should Know?
"Particularly Dangerous Situation" highlights extraordinary danger within an existing winter weather warning.
A Blizzard Warning already indicates strong winds and severely reduced visibility from falling or blowing snow. Adding PDS wording would emphasize an exceptional threat.
In an Ice Storm Warning, it could highlight potentially devastating ice accumulation.
Why Could This Matter Across Iowa?
Iowa's open farmland and strong winter winds can produce dangerous whiteout conditions, even after snowfall has stopped.
Des Moines, Ames and central Iowa may experience major transportation disruptions, while Sioux City, Council Bluffs and western Iowa face risks from blowing snow across exposed highways.
Cedar Rapids, Waterloo, Dubuque and eastern Iowa can also experience heavy snow, freezing rain and damaging ice storms.
During an extreme event, Interstate 80 between Council Bluffs, Des Moines and Davenport, Interstate 35 through central Iowa and Interstate 29 along western Iowa could become hazardous or impassable.
Blowing snow can strand motorists, while heavy ice accumulation can damage power lines and leave homes without electricity or reliable heating.
These are possible impacts, not predictions of an approaching storm.
Is PDS a New Winter Weather Warning?
No. PDS is additional wording within certain existing Blizzard Warnings and Ice Storm Warnings, not a separate warning category.
Most Iowa winter storms will not receive the designation.
What Should Iowa Residents Do?
If PDS wording appears, residents should avoid unnecessary travel, follow emergency instructions and prepare for potentially prolonged disruptions.
The expanded terminology does not mean a catastrophic winter storm is currently forecast for Iowa.