Two weak tornadoes developed ahead of an approaching boundary in an area of weak instability but strong shear. No damage occurred with these tornadoes.
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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.
Two weak tornadoes developed ahead of an approaching boundary in an area of weak instability but strong shear. No damage occurred with these tornadoes.
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, 3:51 PM CST, 13 minutes earlier.
Area Forecast Discussion National Weather Service Des Moines IA 351 PM CST Sat Nov 30 2019 .DISCUSSION.../Tonight through Saturday/ Issued at 351 PM CST Sat Nov 30 2019 .Overview...The next 30 hours or so will hold the most active weather in the period. In this period, low clouds, drizzle, and fog will be common over northern Iowa with rain showers and even a little thunder possible over western Iowa through early this evening. As cold air follows behind low pressure moving east across Iowa, rain will change to snow and winds will increase. This will likely bring some impact to travel on Sunday, especially for those heading home from the Thanksgiving holiday. .Details...Low pressure is spinning over northeastern Nebraska this afternoon and easily seen in the suite of GOES-East products. Clearing has pushed into southwest Iowa and even into parts of central Iowa. A small line of showers with a recent lightning strike has occurred over our west central counties. Where there has been clearing, temperatures have been lifted into the low 50s, but farther north on the cold side of the boundary and with the clouds, temperatures have remained in the middle 30s. Most of the precipitation today has been in the form of drizzle as cross sections show drier air aloft has removed ice introduction from the column. Combined with air and road temperatures above freezing, it has just been a raw, chilly day over the northeastern half or so of the state. As the low pressure moves eastward and through the state tonight, precipitation will continue. Initially, the precipitation will be focused over northern Iowa where there will be shallow moisture mainly for some drizzle along with areas of fog. As the low moves east and cold air begins to move in, moisture wrapping behind in the TROWAL will change to snow. Moisture depth also increases and while it does make it into the dendritic growth zone, omega values are weak to perhaps moderate. Thus, mainly light snow is expected and will be prevalent through roughly midday tomorrow after which more subsidence will be moving in and decreasing snowfall. NAM soundings do show a bit of elevated instability and this hints at some horizontal convective roll snow shower potential. If this were to come to fruition, this could briefly and locally enhance snow rates causing reduced visibility. The highest snow amounts will be over northern Iowa where 1 to 2 inches is possible with lesser amounts farther south. Concurrently as the cold air is moving in and snow is falling, cold air advection strongest in the 925 to 850mb layer along with pressure rises of 4 to 6 mb/3 hours and a packed pressure gradient will equate to increasing winds. The strongest winds look to set up over southwestern Iowa and a wind advisory has been raised for these areas from late tonight through midday tomorrow. While the snowpack on the ground is limited to northern Iowa and likely not blowable with recent above freezing conditions, the falling snow will be blown around and reduce visibilities. With additional citizens on the roadways heading home or back to school after the Thanksgiving holiday, will message the blowing snow concerns through our traditional and non-traditional avenues at this time. Winds will be slowly waning through the afternoon into the evening as the low makes it way through the Ohio Valley. The remainder of the forecast is largely quiet favoring dry weather with northwest then later west flow aloft much of the week. There are several shortwave troughs that move through this flow and over our region. One will be Monday night into Tuesday. Cross sections show an increase in moisture, but at this point just expect more clouds than any precipitation. Another shortwave late in the week will pass to our south and the trend amongst the guidance over the last 24 to 36 hours has been for this system to stay south with precipitation chances continuing to be pulled farther south and almost completely out of Iowa. While temperatures will be below normal on Monday, much of the rest of the week will have temperatures near or a bit above normal much. && .AVIATION.../For the 18Z TAFS through 18Z Sunday afternoon/ Issued at 1146 AM CST Sat Nov 30 2019 Widespread IFR low stratus and areas of fog prevail over much of the area early this afternoon. Some drying will move into the state and this will allow for improving conditions, at least over the southern terminals. As low pressure moves into and through the state tonight, fog and drizzle will prevail ahead of the low over northern Iowa. As the low passes, colder air will filter in and with wraparound moisture precipitation will change over to snow, with the exception of DSM and OTM where it will mix with rain or change back to rain Sunday morning. Gusty winds from the northwest will develop tonight and continue through the end of the TAF period. && .DMX WATCHES/WARNINGS/ADVISORIES... Wind Advisory from 3 AM to noon CST Sunday for IAZ033-044-045- 057-058-070-071-081-082-092-093. && DISCUSSION...Ansorge AVIATION...Ansorge
Hazardous Weather Outlook National Weather Service Des Moines IA 344 PM CST Sat Nov 30 2019 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-012145- 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- 344 PM CST Sat Nov 30 2019 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...This afternoon and tonight Non-severe thunderstorms are possible this afternoon. Rain changing to light snow will occur later tonight. Snow covered roads by late tonight will begin primarily over northern Iowa. .DAYS TWO THROUGH SEVEN...Sunday through Friday A wind advisory is in effect for west central Iowa from 3 AM through noon on Sunday. Northwest winds will gust to between 35 to 45 mph. The light snow will continue Sunday, with light accumulations expected. The combination of snow and blowing snow may reduce visibility at times, mainly across northern Iowa, and could impact holiday travel. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected, however, any winter weather reports are appreciated.
The Des Moines radar (KDMX), 60 km away, was scanning. The volume nearest the first event began at 22:05 UTC.
2 tornado. Local standard time, as filed.
Law Enforcement reported a weak tornado northeast of Guthrie Center near the southern shore of Lake Panorama. The tornado remained in rural areas with no damage indicators impacted, therefore an EF-U rating.
Tornado touched down in an unharvested corn field just north of 180th street about one half mile west of Redwood Avenue. The tornado traveled northeast remaining in agricultural fields and crossing Redwood Avenue then ending prior to 170th street. No damage indicators were impacted by the tornado, hence the EF-U rating.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2019Every state in 2019This day in weather historyThe tornado archive for Iowa, 2019Warnings in Iowa, November 2019
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: 859562, 858881.