Longer term drought persisted in portions of western Iowa into December. Little change was observed in the areal coverage as much of the state had become hydrologically inactive with regards to the ground as winter settled in across Iowa.
Every event with a place to put it; 13 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 DMX wrote it up.
Longer term drought persisted in portions of western Iowa into December. Little change was observed in the areal coverage as much of the state had become hydrologically inactive with regards to the ground as winter settled in across Iowa.
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 Des Moines, IA wrote its last area forecast discussion before the first event at Nov 30, 11:41 PM CST, 19 minutes earlier.
Area Forecast Discussion National Weather Service Des Moines IA 1141 PM CST Mon Nov 30 2020 ...Updated Aviation Discussion... .DISCUSSION.../Tonight through Monday/ Issued at 223 PM CST Mon Nov 30 2020 Main Points: - Chilly tonight with lows in the teens. - Quiet and dry forecast through the next 7 days. Benign weather across the forecast area today as the region resides under the subsident side of a deep trough digging into the eastern conus. An area of surface high pressure slides through overnight setting up near ideal conditions for strong radiational cooling. Current forecast has lows in the mid to upper teens, but would not be surprised to see some favorable locations such as the Nish River Valley and other low lying areas drop a few degrees cooler. Winds become southerly tomorrow as the surface high departs to the east. This will boost highs a few degrees but still in the upper 30s to low 40s. A complex, high-amplitude upper level pattern sets up through the middle to latter half of the week. A series of shortwaves diving south out of western/central Canada will reinforce the mean troughing over the eastern two-thirds of the conus. The waves initially drop south along the Front Range/High Plains and retrograde westerly a bit as they round a west coast rex block, then slowly kick east through the Gulf coast region. Deterministic and ensemble solutions are not quite in lock step with the track and evolution of each shortwave. However, all solutions still keep any precipitation chances south of the area and only deliver some passing mid to high level cloud cover that could impact forecast highs by a few degrees. Models drive another shortwave southeast through the Great Lakes region over the weekend. The bulk of the kinematic forcing and appreciable moisture passes east of the area, so the forecast remains dry for now. && .AVIATION.../For the 06Z TAFS through 06Z Tuesday night/ Issued at 1140 PM CST Mon Nov 30 2020 Continued with VFR conditions throughout the TAF period as high pressure remains in control of the weather pattern. && .DMX WATCHES/WARNINGS/ADVISORIES...NONE. && DISCUSSION...Martin AVIATION...Podrazik
Hazardous Weather Outlook National Weather Service Des Moines IA 228 PM CST Mon Nov 30 2020 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-012030- 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- 228 PM CST Mon Nov 30 2020 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...This afternoon and tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
The national radar mosaic for the moment the first event began.
13 drought. Local standard time, as filed.
Severe drought persisted across portions of Emmet county during December with little water recharge given frozen ground conditions.
Severe drought persisted across all of Palo Alto county during December with little water recharge given frozen ground conditions.
Severe drought persisted across portions of Kossuth county during December with little water recharge given frozen ground conditions.
Severe drought persisted across portions of Pocahontas county during December with little water recharge given frozen ground conditions.
Severe drought persisted across portions of Sac county during December with little water recharge given frozen ground conditions.
Severe drought persisted across a small portion of northwest Calhoun county during December with little water recharge given frozen ground conditions.
Severe drought persisted across much of Crawford county during December with little water recharge given frozen ground conditions.
Severe drought persisted across a very small portion of northwest Carroll county during December with little water recharge given frozen ground conditions.
Severe drought persisted across southern Audubon county during December with little water recharge given frozen ground conditions.
Severe drought persisted across far southwest Guthrie county during December with little water recharge given frozen ground conditions.
Severe drought persisted across much of Cass county during December with little water recharge given frozen ground conditions.
Severe drought persisted across western Adair county during December with little water recharge given frozen ground conditions.
Severe drought persisted across far northwest Adams county during December with little water recharge given frozen ground conditions.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2020Every state in 2020This day in weather historyWarnings in Iowa, December 2020
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: 927151, 927152, 927153, 927154, 927155, 927156, 927157, 927158, 927159, 927160, 927161, 927162, 927163.