Alert archive / Iowa / Flash Flood Warnings in 2019
Flash Flood Warning 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jun 27, 2019, 9:14 AM CDT for Lyon County, Sioux County, Iowa; Lincoln County, South Dakota. It was in force for 3 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 27, 2019, 9:14 AM CDT (14:14 UTC)
- Expired
- Jun 27, 2019, 12:15 PM CDT
- In force
- 3 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- None
Counties Lyon County, IA, Sioux County, IA, Lincoln County, SD
The radar
The Sioux Falls radar (KFSD), 48 km from the middle of the area, began a volume at 14:14 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 27, 10:10 AM CDT | HEAVY RAIN 2.2 | Hull, IA | STORM TOTAL ENDING AT 10:10AM. |
| Jun 27, 10:10 AM CDT | HEAVY RAIN 2.5 | Hull, IA | CORRECTS PREVIOUS HEAVY RAIN REPORT FROM HULL. STORM TOTAL ENDING AT 11:50AM. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 2.2 hours before the alert went out and 226 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
- 2685 J/kg
- Mixed-layer CIN
- -256 J/kg
- Mixed-layer LCL
- 1211 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted.
708
WGUS53 KFSD 271414
FFWFSD
IAC119-167-SDC083-271715-
/O.NEW.KFSD.FF.W.0004.190627T1414Z-190627T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Sioux Falls SD
914 AM CDT Thu Jun 27 2019
The National Weather Service in Sioux Falls has issued a
* Flash Flood Warning for...
Lyon County in northwestern Iowa...
Northwestern Sioux County in northwestern Iowa...
Southeastern Lincoln County in southeastern South Dakota...
* Until 1215 PM CDT.
* At 909 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Two to four inches of rain have
already fallen. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Sioux Center, Rock Rapids, Beresford, Rock Valley, Hull, George,
Inwood, Doon, Hudson, Lester, Alvord, Fairview and Newton Hills
State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4350 9587 4309 9616 4309 9681 4341 9634
4350 9639
$$
Rogers2 follow-up statements
521
WGUS73 KFSD 271451
FFSFSD
Flash Flood Statement
National Weather Service Sioux Falls SD
951 AM CDT Thu Jun 27 2019
IAC119-167-SDC083-271715-
/O.CON.KFSD.FF.W.0004.000000T0000Z-190627T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lyon IA-Sioux IA-Lincoln SD-
951 AM CDT Thu Jun 27 2019
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT FOR
LYON...NORTHWESTERN SIOUX AND SOUTHEASTERN LINCOLN COUNTIES...
At 947 AM CDT, emergency management reported flash flooding due to
thunderstorms and heavy rain in Rock Valley. Gauge reports and radar
estimates indicate between two and four inches of rain have already
fallen.
Some locations that will experience flooding include...
Sioux Center, Rock Rapids, Beresford, Rock Valley, Hull, George,
Inwood, Doon, Hudson, Lester, Alvord, Fairview and Newton Hills State
Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4350 9587 4309 9616 4309 9681 4341 9634
4350 9639
$$
Kalin674
WGUS73 KFSD 271708
FFSFSD
Flash Flood Statement
National Weather Service Sioux Falls SD
1208 PM CDT Thu Jun 27 2019
IAC119-167-SDC083-271717-
/O.EXP.KFSD.FF.W.0004.000000T0000Z-190627T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lyon IA-Sioux IA-Lincoln SD-
1208 PM CDT Thu Jun 27 2019
...THE FLASH FLOOD WARNING FOR LYON...NORTHWESTERN SIOUX AND
SOUTHEASTERN LINCOLN COUNTIES WILL EXPIRE AT 1215 PM CDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 4350 9587 4309 9616 4309 9681 4341 9634
4350 9639
$$
SchumacherThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 8:18 AM CDT | Flash Flood Warning | FSD | Lyon | 117 min |
| Jun 27, 8:22 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 23 min |
| Jun 27, 8:30 AM CDT | Severe Thunderstorm Warning | FSD | Lyon | 30 min |
| Jun 27, 8:40 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Sioux | 50 min |
| Jun 27, 12:33 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, O'Brien, Osceola | 42 min |
| Jun 27, 12:36 PM CDT | River Flood Warning | FSD | Plymouth, Sioux | 4 days |
| Jun 27, 12:36 PM CDT | River Flood Warning | FSD | Plymouth | 31 days |
| Jun 27, 12:36 PM CDT | River Flood Warning | FSD | Lyon | 32 hr |
| Jun 27, 2:26 PM CDT | River Flood Warning | FSD | Lyon | 7 hr |
| Jun 27, 3:15 PM CDT | Heat Advisory | FSD | Plymouth, Sioux, Woodbury | 29 hr |
| Jun 27, 3:34 AM CDT | Severe Thunderstorm Warning | FSD | Davison, Douglas, Hanson, Hutchinson, McCook | 41 min |
| Jun 27, 3:57 AM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, McCook, Miner | 48 min |
| Jun 27, 4:36 AM CDT | Severe Thunderstorm Warning | FSD | Kingsbury, Lake, McCook, Miner | 39 min |
| Jun 27, 10:22 AM CDT | River Flood Warning | FSD | Brookings, Hamlin | 52 hr |
Nearby
Flash Flood Warnings in Iowa, 2019Flash Flood Warnings in South Dakota, 2019Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.