An unseasonably cool and dry airmass allowed temperatures to fall below freezing across much of the lower valleys where the growing season had already begun.
Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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.
The episode as NWS GJT wrote it up.
An unseasonably cool and dry airmass allowed temperatures to fall below freezing across much of the lower valleys where the growing season had already begun.
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 Grand Junction, CO wrote its last area forecast discussion before the first event at May 1, 1:54 PM MST, 9 hours 6 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
3 frost/freeze. Local standard time, as filed.
Minimum temperatures reached 29 to 32 degrees over about half the area.
Minimum temperatures reached 23 to 32 degrees over more than half the area.
Minimum temperatures reached 27 to 32 degrees over more than half the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2008Every state in 2008This day in weather historyWarnings in Utah, May 2008
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 2026-10-01. Each event’s entry at NCEI: 109224, 109221, 109219.