Alert archive / South Dakota / Flood Watches in 2019

Flood Watch 1, NWS Sioux Falls, SD

March 11, 201924 counties in South Dakota; 11 counties in Iowa; 8 counties in Minnesota

NWS Sioux Falls, SD issued this flood watch at Mar 11, 2019, 3:13 PM CDT for 24 counties in South Dakota; 11 counties in Iowa; 8 counties in Minnesota. It took effect at Mar 13, 2019, 7:00 AM CDT. It was in force for 32 hr.

The area

The counties it named.

The facts

Issued: Mar 11, 2019, 3:13 PM CDT (20:13 UTC)
In effect from: Mar 13, 2019, 7:00 AM CDT
Expired: Mar 14, 2019, 3:04 PM CDT
In force: 32 hr
Issued by: NWS Sioux Falls, SD
Flood severity: None

All 43 counties

Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 12 km from the middle of the area, began a volume at 20:12 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.2 hours before the alert went out and 298 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1151 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch 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 flood watch went out at Mar 11, 1:00 PM CDT, 2 hours 13 minutes earlier.

Area forecast discussion, Mar 11, 1:00 PM CDT, 2 hours 13 minutes before

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Hazardous weather outlook, Mar 11, 4:08 AM CDT, 11 hours 5 minutes before

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The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 11, 3:03 PM CDT	Winter Storm Watch	FSD	Aurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 18 more	49 hr

Nearby

Flood Watches in South Dakota, 2019 Flood Watches in Iowa, 2019 Flood Watches in Minnesota, 2019 Every flood watch in 2019

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.