A brief tornado occurred with a shower in Davis County during the late morning. Weak instability along a modest boundary was sufficient for a small tornado from a shower producing EF0 damage.
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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.
A brief tornado occurred with a shower in Davis County during the late morning. Weak instability along a modest boundary was sufficient for a small tornado from a shower producing EF0 damage.
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 5, 5:26 AM CST, 5 hours 35 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Des Moines IA 526 AM CST Tue Nov 5 2024 ...Updated for the 12z Aviation Discussion... .KEY MESSAGES... - Lingering rain this morning, mainly over the northwest half of Iowa, departs during the afternoon. - The forecast is dry from tonight through Thursday night, with daily high temperatures generally in the 50s. - Another system will produce rain toward the end of the week or next weekend, but timing and placement remain uncertain. && .DISCUSSION... Issued at 215 AM CST Tue Nov 5 2024 A surface low is moving from northeastern Missouri into Iowa at this hour, and will track across eastern portions of the state today, then up into Wisconsin and the Upper Peninsula of Michigan by tonight. The cyclone is exhibiting textbook arrangement of precipitation, with a band of thunderstorms and heavier rain along the southeast flank stretching from Illinois across Missouri and into the Texarkana region, and a swath of lighter rain in the deformation zone along the northwestern flank across eastern Nebraska and about the northwest half of Iowa. The heavier precipitation on the southeastern flank will stay east of our area today, while the latter deformation zone rain will translate through this morning, then depart this afternoon with the low. As a result, it will be another soggy morning across roughly the northwestern half of our forecast area, with patchy drizzle further south, then clear out everywhere before the end of the day. Additional QPF remains under an inch in the northwest and a quarter inch or less in the southeast, and thunderstorms are not anticipated given the lack of instability. Aside from the lingering/departing rain, the other most sensible effects of this system will be changes in temperature with the passage of the low. Low-level winds exhibit a broad circulation over the state at this time, but will sharpen as the low moves through with an effective cold front sweeping through as the low departs. Warm air advection this morning will thus push temperatures up somewhere in eastern/southeastern Iowa before the front moves through later, while across the remainder of the state winds will turn to northwest and modest cold air advection will result in steady or slowly falling temperatures during the day. The high temperature forecast is thus a bit tricky, with temps likely to remain in the mid 40s in our northwest counties but briefly increase into the low to mid 60s in our southeast corner before decreasing again. Behind the departing storm system, a surface high pressure ridge will spread across the region tonight and linger through Wednesday. However, a 500 mb trough will dig down the High Plains and Rockies during this time, maintaining southwesterly steering flow over Iowa. From late Wednesday through Thursday modest forcing within a deep saturated layer aloft will result in thickening clouds within this southwesterly flow and some models are spitting out light QPF a times, however, low-level dry air entrainment in northeasterly flow out of the aforementioned ridge will undercut this as evidenced by forecast soundings. At this time it appears likely the low-level dry air will win out, and have maintained a dry forecast during this period. By Thursday the western U.S. 500 mb trough will close off somewhere over Arizona and New Mexico, then on Friday emerge into the Plains and strengthen as a large cyclone approaching Iowa from the southwest, finally passing over the Hawkeye State sometime next weekend. This cyclone will likely be preceded by a conveyor belt of rain within a swath of warm air advection and isentropic lift, then accompanied and followed by an area of lighter rain somewhat similar to the system this morning. However, long-range forecast models continue to struggle with the timing of the ejection of the late-week system and thus it is difficult to pin down then the rain will fall in our service area. Consensus solutions have trended mainly in the Friday night to Saturday night period, and have maintained the highest POPs during that time with an expectation that they will be refined in the coming days as timing/track solutions coalesce. && .AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/... Issued at 526 AM CST Tue Nov 5 2024 Very low ceilings, IFR or lower, will prevail at the terminals for much of this morning, with scattered to numerous light showers and fog reducing visibility to MVFR at times. Conditions will slowly improve by this afternoon, with MVFR ceilings prevailing and then eventually breaking out to VFR at DSM/OTM by tonight, but perhaps MVFR ceilings persisting at the northern terminals. Expect amendments throughout the day based on short- term and observational trends. && .DMX WATCHES/WARNINGS/ADVISORIES...None. && DISCUSSION...Lee AVIATION...Lee
Hazardous Weather Outlook National Weather Service Des Moines IA 355 AM CST Tue Nov 5 2024 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-061200- 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- 355 AM CST Tue Nov 5 2024 This Hazardous Weather Outlook is for much of central Iowa. .DAY ONE...Today and tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday A few storms are possible south and east Saturday, but severe weather is not anticipated. .SPOTTER INFORMATION STATEMENT... Spotters will not be needed. Small
The Des Moines radar (KDMX), 154 km away, was scanning. The volume nearest the first event began at 17:01 UTC.
1 tornado. Local standard time, as filed.
A brief tornado occurred south of Floris from a developing weak storm. The tornado moved across a farmstead on the west side of Pecan Avenue producing high end EF0 damage to two metal buildings. The tornado lifted shortly afterwards.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2024Every state in 2024This day in weather historyThe tornado archive for Iowa, 2024Warnings in Iowa, November 2024
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: 1216653.