An unusually intense upper-level trough and surface low was located across southern Canada and moved toward the northern Great Lakes with a very deep mixed-layer across the Northern Plains. Synoptic winds gusted mainly 45 to 55 mph, with a few spots reaching around 60 mph in southwest Minnesota and east central South Dakota.
Every event with a place to put it; 7 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 FSD wrote it up.
An unusually intense upper-level trough and surface low was located across southern Canada and moved toward the northern Great Lakes with a very deep mixed-layer across the Northern Plains. Synoptic winds gusted mainly 45 to 55 mph, with a few spots reaching around 60 mph in southwest Minnesota and east central South Dakota.
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 Sioux Falls, SD wrote its last area forecast discussion before the first event at Jun 6, 11:31 AM CST, 29 minutes earlier. Its key messages:
Area Forecast Discussion
National Weather Service Sioux Falls SD
1231 PM CDT Thu Jun 6 2024
.KEY MESSAGES...
- Breezy northwest winds with gusts up into the lower 40s
possible. Strongest gusts are expected along the Buffalo Ridge
given their elevated elevation.
- Scattered showers return Friday afternoon into Saturday
morning. Probabilities for 0.10" of rain remain below 40%.
- Chances for above normal temperatures return late next week as
a ridge of high pressure builds across the south.
&&
.DISCUSSION...
Issued at 358 AM CDT Thu Jun 6 2024
Early morning satellite imagery shows clear skies across our area,
with a surface high pressure sliding southeastwards off to our west.
With a strong surface low pressure remaining well off to our
northeast, the surface pressure gradient between these two features
remains elevated today. While winds during the remaining early
morning hours will remain in the teens, as the inversion weakens
throughout the rest of the morning hours after sunrise, we will
again see stronger winds aloft brought down to the surface.
Currently expecting wind gusts of 35 mph up into the lower 40s,
though if we are more mixy than currently expected winds could end
up above 45 mph. While the ensemble situational awareness tables
(ESATs) again shows winds at 850mb at the 90th percentile of
climatology for today, models are showing that 850mb winds do not
mix down through the 925mb layer...so it seems the winds will purely
be based on the surface pressure gradient. Have thus kept winds just
shy of advisory level, but day shift will need to monitor the
observations to see if an advisory is needed. Temperatures in the
lower 70s are expected across SW MN, warming up into the lower 80s
for areas along the Missouri River Valley.
Friday will see the surface high pressure expand into a ridge as it
traverse the region eastwards, which will swing the winds around to
become out of the southeast. As a weak surface low pressure develops
quickly on the backside of the ridge, mid-level warm-air advection
(WAA) develops as a weak shortwave moves across the region,
resulting in scattered light showers possible along the Missouri
River Valley throughout the day. Otherwise, afternoon temperatures
remain in the mid 70s to lower 80s. Chances for scattered light
showers extend northwards overnight into Saturday as a weak mid-
level low moves overhead. Probabilities for 0.10" of rain overnight
remain below 40%, with highest chances along the SD/NE border.
A surface high pressure dives southwards on Saturday, ending chances
for rain by Saturday morning. The surface high will have brought
slightly cooler temperatures along with it, resulting in afternoon
highs for Saturday and Sunday expected to remain below average in
the lower to upper 70s.
Will likely see a shortwave at some point early next week resulting
chances for rain, with models currently indicating this should
happen Monday night into Tuesday. Otherwise, models have continued
to show a mid-level ridge expanding into the central plains mid-
week, which will increase chances for above normal temperatures and
increased chances for below normal precipitation.
&&
.AVIATION /18Z TAFS THROUGH 18Z FRIDAY/...
Issued at 1231 PM CDT Thu Jun 6 2024
VFR conditions are expected to prevail this TAF cycle, with breezy
northwest winds still the main concern. Latest observations show
gusts ranging between 35 to 50 MPH. Should see this continue for
much of the afternoon, with gusts quickly diminishing near sunset.
Direction then become light and variable overnight. Otherwise, look
for shower and storm chances to return after daybreak Friday, a few
of which may become strong to severe during the afternoon.
&&
.FSD WATCHES/WARNINGS/ADVISORIES...
SD...Wind Advisory until 7 PM CDT this evening for SDZ038>040-
053>056-060>062-066-067-071.
MN...Wind Advisory until 7 PM CDT this evening for MNZ071-072-080-
081-089-090-097-098.
IA...Wind Advisory until 7 PM CDT this evening for IAZ001>003-
012>014-020>022-031-032.
NE...None.
&&
DISCUSSION...APT
AVIATION...SSTHazardous Weather Outlook National Weather Service Sioux Falls SD 457 AM CDT Thu Jun 6 2024 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-071000- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory- Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson- McCook-Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme- Yankton-Union- 457 AM CDT Thu Jun 6 2024 This Hazardous Weather Outlook is for portions of northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, central South Dakota, east central South Dakota, south central South Dakota, and southeast South Dakota. .DAY ONE...Today and Tonight Breezy northwest winds are again expected today, with gusts 35 mph up into the lower 40s expected. Isolated higher gusts are possible, especially for areas along the Buffalo Ridge in SW MN given their elevated elevation. .DAYS TWO THROUGH SEVEN...Friday through Wednesday No hazardous weather expected. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
7 strong wind. Local standard time, as filed.
Strong synoptic winds gusted up to 53 mph near Storm Lake and 50 mph near Rembrandt.
Strong synoptic winds gusted up to 46 mph at Terril.
Strong synoptic winds gusted up to 48 mph near Sibley.
Strong synoptic winds gusted up to 53 mph at Sheldon. A large tree was uprooted 3 miles south of Hartley.
Strong synoptic winds gusted up to 53 mph near Maurice and 47 mph near Orange City.
Strong synoptic winds gusted up to 48 mph near Sibley.
Strong synoptic winds gusted up to 51 mph near Spencer.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2024Every state in 2024This day in weather historyWarnings in Iowa, June 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: 1198954, 1198957, 1198959, 1198964, 1198965, 1198966, 1198955.