Alert archive / Minnesota / Areal Flood Warnings in 2014

Areal Flood Warning 13, NWS Twin Cities, MN

August 21, 2014Brown County, Watonwan County, Minnesota

NWS Twin Cities, MN issued this areal flood warning at Aug 21, 2014, 3:53 AM CDT for Brown County, Watonwan County, Minnesota. It was in force for 5 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 21, 2014, 3:53 AM CDT (08:53 UTC)
Expired: Aug 21, 2014, 8:30 AM CDT
In force: 5 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Brown County, MN, Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 116 km from the middle of the area, began a volume at 08:53 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, 8.9 hours before the alert went out and 114 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: 397 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1160 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

631 
WGUS43 KMPX 210853
FLWMPX

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
353 AM CDT THU AUG 21 2014

MNC015-165-211330-
/O.NEW.KMPX.FA.W.0013.140821T0853Z-140821T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROWN MN-WATONWAN MN-
353 AM CDT THU AUG 21 2014

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLOOD WARNING FOR...
  SOUTHERN BROWN COUNTY IN SOUTH CENTRAL MINNESOTA...
  WATONWAN COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 830 AM CDT

* AT 352 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. AN ESTIMATED 2 TO 4 INCHES HAVE ALREADY FALLEN...AND  
  AN ADDITIONAL 2 TO 3 IS POSSIBLE IN THE NEXT COUPLE OF HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLOODING TO OCCUR.
  SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...NEW ULM...ST
  JAMES AND MADELIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. 
DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...DIPS... OR LOW WATER 
CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A SMALL 
ONE...ON FOOT OR IN A VEHICLE.

&&

LAT...LON 4409 9487 4410 9509 4413 9511 4436 9449
      4433 9445 4433 9446 4428 9442 4426 9437
      4408 9436 4385 9438 4384 9486

$$

JRB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 12:24 AM CDT	Special Weather Statement	MPX	Lac qui Parle	36 min
Aug 21, 12:52 AM CDT	Special Weather Statement	MPX	Stevens	53 min
Aug 21, 2:01 AM CDT	Areal Flood Warning	MPX	Stevens, Swift	6 hr
Aug 21, 2:33 AM CDT	Flash Flood Watch	MPX	Anoka, Blue Earth, Carver, Chippewa, Dakota, Douglas and 21 more	4 hr
Aug 21, 2:50 AM CDT	Special Weather Statement	MPX	Brown, Martin, Watonwan	85 min
Aug 21, 3:07 AM CDT	Special Weather Statement	MPX	Chippewa, Kandiyohi, Pope, Swift	83 min
Aug 21, 4:20 AM CDT	Severe Thunderstorm Warning	MPX	Martin	40 min
Aug 21, 4:31 AM CDT	Special Weather Statement	MPX	Blue Earth, Nicollet	59 min
Aug 21, 4:47 AM CDT	Severe Thunderstorm Warning	MPX	Faribault	43 min
Aug 21, 5:10 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Waseca	50 min
Aug 21, 7:16 AM CDT	Heat Advisory	MPX	Blue Earth, Brown, Carver, Dakota, Faribault, Freeborn and 14 more	13 hr
Aug 21, 6:20 PM CDT	Special Weather Statement	MPX	Watonwan	25 min

Nearby

Areal Flood Warnings in Minnesota, 2014 Every areal flood warning in 2014

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.