Alert archive / Minnesota / Flash Flood Warnings in 2016

Flash Flood Warning 34, NWS Sioux Falls, SD

September 22, 2016Cottonwood County, Minnesota

NWS Sioux Falls, SD issued this flash flood warning at Sep 22, 2016, 6:31 AM CDT for Cottonwood County, Minnesota. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 22, 2016, 6:31 AM CDT (11:31 UTC)
Expired
Sep 22, 2016, 9:30 AM CDT
In force
3 hr
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Flood severity
None

County Cottonwood County, MN

The radar

The Minneapolis radar (KMPX), 143 km from the middle of the area, began a volume at 11:30 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 00:00Z, 11.5 hours before the alert went out and 140 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2016-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 144 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2016-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 428 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
144 J/kg
Mixed-layer CIN
-361 J/kg
Mixed-layer LCL
641 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
428 m²/s²
0-3 km storm-relative helicity
596 m²/s²
Significant tornado parameter
0.0
Supercell composite
11.6

Open this sounding in Storm Lab

The text

As transmitted.

261 
WGUS53 KFSD 221131
FFWFSD
MNC033-221430-
/O.NEW.KFSD.FF.W.0034.160922T1131Z-160922T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
631 AM CDT THU SEP 22 2016

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL COTTONWOOD COUNTY IN SOUTHWESTERN MINNESOTA...

* UNTIL 930 AM CDT

* AT 629 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.  RADAR ESTIMATES FROM 2 TO 3 INCHES OF RAINFALL HAS
  OCCURRED...WITH POTENTIAL FOR ANOTHER INCH OR TWO THROUGH 8 AM.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  COMFREY.
  AREAS NEAR HIGHWAY 30 EAST OF JEFFERS TO THE COUNTY LINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4400 9486 4403 9516 4411 9511 4411 9486

$$

CHAPMAN
2 follow-up statements
341 
WGUS73 KFSD 221307
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
807 AM CDT THU SEP 22 2016

MNC033-221430-
/O.CON.KFSD.FF.W.0034.000000T0000Z-160922T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COTTONWOOD MN-
807 AM CDT THU SEP 22 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 AM CDT FOR
EAST CENTRAL COTTONWOOD COUNTY...

AT 806 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. THREE TO FIVE INCHES OF RAIN HAVE
ALREADY FALLEN. 

ADDITIONAL RAINFALL AMOUNTS OF UP TO AN INCH ARE POSSIBLE IN THE
WARNED AREA THROUGH 9 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4400 9486 4403 9516 4411 9511 4411 9486

$$

GILLISPIE
886 
WGUS73 KFSD 221427
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
927 AM CDT THU SEP 22 2016

MNC033-221436-
/O.EXP.KFSD.FF.W.0034.000000T0000Z-160922T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COTTONWOOD MN-
927 AM CDT THU SEP 22 2016

...THE FLASH FLOOD WARNING FOR EAST CENTRAL COTTONWOOD COUNTY WILL
EXPIRE AT 930 AM CDT...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. LIGHT RAIN WILL CONTINUE OFF AND ON THROUGH THE DAY. PLEASE
CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4400 9486 4403 9516 4411 9511 4411 9486

$$

GILLISPIE

Nearby

Flash Flood Warnings in Minnesota, 2016Every flash flood warning in 2016

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.