Alert archive / Iowa / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 40, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 24, 2024, 3:58 AM CDT for Clay County, Dickinson County, Iowa; Jackson County, Minnesota. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 24, 2024, 3:58 AM CDT (08:58 UTC)
- Expired
- May 24, 2024, 4:30 AM CDT
- In force
- 32 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Clay County, IA, Dickinson County, IA, Jackson County, MN
The radar
The Sioux Falls radar (KFSD), 129 km from the middle of the area, began a volume at 09:00 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 23, 8:43 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 9.0 hours before the alert went out and 205 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 10 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 2258 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at May 24, 3:04 AM CDT, 54 minutes earlier. Its key messages:
- Strong to severe storms will exit northwest IA and southwest MN early this morning.
- Windy conditions with northwesterly winds gusting to 30-40 mph today.
- Periodic showers and thunderstorms for Memorial Day weekend. While we are not currently expecting strong storms, lightning is still possible. When thunder roars, go indoors!
Area forecast discussion, May 24, 3:04 AM CDT, 54 minutes before
Area Forecast Discussion National Weather Service Sioux Falls SD 304 AM CDT Fri May 24 2024 .KEY MESSAGES... - Strong to severe storms will exit northwest IA and southwest MN early this morning. - Windy conditions with northwesterly winds gusting to 30-40 mph today. - Periodic showers and thunderstorms for Memorial Day weekend. While we are not currently expecting strong storms, lightning is still possible. When thunder roars, go indoors! && .DISCUSSION... Issued at 302 AM CDT Fri May 24 2024 There could be a few lingering showers east of Interstate 29 through mid morning on Friday, before the surface trough slides into the eastern portions of MN and IA by mid day. With cold air advection behind the exiting wave and a fairly tight surface pressure gradient persisting, it will be a breezy day with gusts of 30 to 40 mph. It will be a much cooler day as 850 mb temperatures fall into the teens C, and highs will be in the 60s. With clearing skies and dying winds on Friday night, lows will fall into the 40s. For the holiday weekend leading into Memorial Day, look for warming temperatures - though remaining just below normal for this time of year. This will play out to highs for Saturday-Monday generally in the lower 70s with lows in the upper 40s to mid 50s. Unfortunately the active weather pattern continues, as yet another shortwave and associated surface low eject into the Central Plains on Saturday night into Sunday - this to be followed by another shortwave on Monday. This will bring a chance of periodic showers and thunderstorms through the period. Instability and/or shear look to be on the lower side during this time frame, so severe chances are low. Rainfall amounts do not look especially significant, averaging around a quarter of an inch for any 24 hour period. Models are then in decent agreement on an upper level ridge building across the region for Tuesday through Thursday of next week. This will finally bring a drier period, along with a gradual warming trend, as highs warm into the upper 70s to lower 80s. Toward the end of the period, the ridge starts to flatten out, bringing another chance of precipitation by Thursday. && .AVIATION /06Z TAFS THROUGH 06Z SATURDAY/... Issued at 1220 AM CDT Fri May 24 2024 Showers and thunderstorms will push eastward overnight. There will be a threat for damaging winds, perhaps in excess of 60kt, as storms evolve into a line which is projected to move through the lower Missouri River Valley and portions of northwest Iowa through 09Z. In addition to the stronger winds, MVFR-IFR ceilings will be possible in heavier thunderstorms. Storms move eastward after 10Z, with winds transitioning to west then northwesterly behind a frontal boundary moving across the area. By Friday morning, northwesterly winds will gust 30 to 40 kts through Friday mid evening, then become light by late evening. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...None. MN...None. IA...None. NE...None. && DISCUSSION...JM AVIATION...JM
In the hours before
Local storm report, May 24, 3:22 AM CDT, 36 minutes before
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</html>Local storm report, May 24, 3:28 AM CDT, 30 minutes before
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</html>The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 9:50 AM CDT | Wind Advisory | FSD | Aurora, Beadle, Brookings, Brule, Charles Mix, Davison and 5 more | 9 hr |
| May 24, 2:29 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 31 min |
| May 24, 2:52 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson | 23 min |
| May 24, 3:13 AM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 17 min |
| May 24, 7:32 AM CDT | River Flood Warning | FSD | Dickinson | 19 days |
| May 24, 9:07 AM CDT | River Flood Warning | FSD | Buena Vista, Cherokee, Clay, O'Brien | 6 days |
| May 24, 4:36 PM CDT | River Flood Warning | FSD | Clay | 19 days |
Nearby
Severe Thunderstorm Warnings in Iowa, 2024Severe Thunderstorm Warnings in Minnesota, 2024Every severe thunderstorm warning in 2024
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.