Alert archive / Minnesota / Flash Flood Warnings in 2016

Flash Flood Warning 24, NWS Twin Cities, MN

August 29, 2016Douglas County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Aug 29, 2016, 5:01 AM CDT for Douglas 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
Aug 29, 2016, 5:01 AM CDT (10:01 UTC)
Expired
Aug 29, 2016, 8:00 AM CDT
In force
3 hr
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Flood severity
None

County Douglas County, MN

The radar

The Minneapolis radar (KMPX), 193 km from the middle of the area, began a volume at 10:02 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, 10.0 hours before the alert went out and 191 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 2016-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1587 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 2016-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
1587 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1130 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.7

Open this sounding in Storm Lab

The text

As transmitted.

261 
WGUS53 KMPX 291001
FFWMPX
MNC041-291300-
/O.NEW.KMPX.FF.W.0024.160829T1001Z-160829T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
501 AM CDT MON AUG 29 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 800 AM CDT

* AT 501 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. 2-4 INCHES OF RAIN HAVE FALLEN
  IN THE LAST 2 HOURS AND FLASH FLOODING IS EXPECTED TO BEGIN
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ALEXANDRIA...EVANSVILLE...CARLOS...BRANDON...LEAF VALLEY...
  MILTONA...GARFIELD...BELLE RIVER...MILLERVILLE AND ROSE CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

&&

LAT...LON 4594 9515 4588 9573 4601 9576 4611 9555
      4611 9514

$$

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 29, 4:31 AM CDTSpecial Weather StatementMPXDouglas59 min
Aug 29, 6:30 AM CDTFlash Flood WarningMPXDouglas, Pope3 hr
Aug 29, 8:27 AM CDTSpecial Weather StatementMPXPope48 min
Aug 29, 5:38 PM CDTSpecial Weather StatementMPXMille Lacs37 min
Aug 29, 6:28 PM CDTSpecial Weather StatementMPXKanabec32 min

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.