Alert archive / Minnesota / Flash Flood Warnings in 2010

Flash Flood Warning 23, NWS Twin Cities, MN

September 23, 20108 counties in Minnesota

NWS Twin Cities, MN issued this flash flood warning at Sep 23, 2010, 3:01 AM CDT for 8 counties in Minnesota. It was in force for 6 hr. 20 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: Sep 23, 2010, 3:01 AM CDT (08:01 UTC)
Expired: Sep 23, 2010, 9:00 AM CDT
In force: 6 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Blue Earth County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Martin County, MN, Rice County, MN, Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 74 km from the middle of the area, began a volume at 08:04 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
Sep 23, 4:00 AM CDT	FLASH FLOOD	Owatonna, MN	STREET FLOODING IN OWATONNA. INTERSECTIONS CLOSED. HOMES EVACULATED ALONG MAPLE CREEK. SANDBAGGING ALONG THE STRAIGHT RIVER WHICH IS OUT OF ITS BANKS.
Sep 23, 4:30 AM CDT	HEAVY RAIN 4.5	Goodhue, MN
Sep 23, 4:40 AM CDT	HEAVY RAIN 4.85	Cannon Falls, MN
Sep 23, 5:45 AM CDT	FLASH FLOOD	Zumbrota, MN	HIGHWAY 52 CLOSED FROM NEAR ZUMBROTA TO PINE ISLAND DUE TO WATER OVER THE ROADS /RUNOFF FROM FARM FIELDS/. NUMEROUS ROAD CLOSURES IN ZUMBROTA COUNTY INCLUDING HIGHWAY 60 NEAR BOMBAY AND HIGHWAY 56 NEAR WEST CONCORD DUE TO OVERFLOWING CREEKS.
Sep 23, 5:46 AM CDT	HEAVY RAIN 4.92	Blue Earth, MN
Sep 23, 6:00 AM CDT	HEAVY RAIN 2.73	Red Wing, MN
Sep 23, 6:00 AM CDT	HEAVY RAIN 3.85	Kenyon, MN	STORM TOTAL UP TO THAT POINT.
Sep 23, 6:41 AM CDT	HEAVY RAIN 6	S Mapleton, MN	SPOTTER MEASURED 6+ INCHES OF RAINFALL. AMOUNT OVER 6 INCHES IS UNKNOWN BECAUSE HIS GAUGE HAD OVERFLOWED.
Sep 23, 7:00 AM CDT	HEAVY RAIN 5.2	Northfield, MN
Sep 23, 7:13 AM CDT	HEAVY RAIN 9.02	Amboy, MN
Sep 23, 7:15 AM CDT	FLASH FLOOD	1 Ene Minnesota Lake, MN	8.35 INCHES OF RAIN WITH PONDING AND STANDING WATER AND LOCAL STREAMS RISING QUICKLY.
Sep 23, 7:15 AM CDT	HEAVY RAIN 4.9	Welcome, MN
Sep 23, 8:00 AM CDT	FLASH FLOOD	Truman, MN	ROADS FLOODED IN TRUMAN. FOUR TO FIVE FEET OF WATER IN BASEMENTS. EGRESS WINDOWS BROKEN DUE TO FLOODING.
Sep 23, 8:00 AM CDT	HEAVY RAIN 3.57	Faribault, MN
Sep 23, 8:00 AM CDT	HEAVY RAIN 3.92	Albert Lea, MN
Sep 23, 8:00 AM CDT	HEAVY RAIN 7	Alden, MN
Sep 23, 8:16 AM CDT	HEAVY RAIN 5	Kenyon, MN	STORM TOTAL UP TO THAT POINT.
Sep 23, 8:19 AM CDT	HEAVY RAIN 5	Kenyon, MN
Sep 23, 8:30 AM CDT	HEAVY RAIN 4.3	Fairmont, MN
Sep 23, 8:50 AM CDT	HEAVY RAIN 10.53	Amboy, MN	FINAL 24 HOUR TOTAL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.0 hours before the alert went out and 74 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 523 m²/s²
0-3 km storm-relative helicity: 621 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.

797 
WGUS53 KMPX 230801
FFWMPX
MNC013-043-047-049-091-131-147-161-231400-
/O.NEW.KMPX.FF.W.0023.100923T0801Z-100923T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
301 AM CDT THU SEP 23 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA
  FARIBAULT COUNTY IN SOUTH CENTRAL MINNESOTA
  FREEBORN COUNTY IN SOUTH CENTRAL MINNESOTA
  GOODHUE COUNTY IN SOUTHEAST MINNESOTA
  MARTIN COUNTY IN SOUTH CENTRAL MINNESOTA
  RICE COUNTY IN SOUTH CENTRAL MINNESOTA
  STEELE COUNTY IN SOUTH CENTRAL MINNESOTA
  WASECA COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 900 AM CDT

* RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL TRAINING    
  ACROSS SOUTH CENTRAL AND SOUTHEAST MINNESOTA. WIDESPREAD RAINFALL  
  OF 3 TO 5 INCHES HAS OCCURRED ACROSS THE WARNING AREA SINCE        
  WEDNESDAY EVENING WITH OVER 7 INCHES REPORTED AT MINNESOTA         
  LAKE IN FARIBAULT COUNTY ALONG WITH BASEMENT FLOODING. ADDITIONAL  
  RAINFALL OVERNIGHT OF 1 TO 3 INCHES IS LIKELY.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ALBERT LEA...BLUE EARTH...FAIRMONT...FARIBAULT...HAYWARD...
  MANKATO...OWATONNA...RED WING...WASECA...ALDEN...AMBOY...BIXBY...
  BLOOMING PRAIRIE...BOMBAY AND BRICELYN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

&&

LAT...LON 4351 9487 4384 9486 4384 9437 4425 9435
      4414 9404 4420 9393 4420 9353 4448 9350
      4448 9302 4455 9288 4454 9280 4460 9279
      4465 9269 4449 9228 4437 9256 4421 9257
      4422 9305 4352 9305

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 22, 7:39 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Martin, Watonwan	51 min
Sep 22, 7:44 PM CDT	Flash Flood Warning	MPX	Brown, Redwood	6 hr
Sep 22, 8:22 PM CDT	Severe Thunderstorm Warning	MPX	Faribault	38 min
Sep 22, 8:50 PM CDT	River Flood Watch	MPX	Blue Earth, Nicollet	36 hr
Sep 22, 8:50 PM CDT	River Flood Watch	MPX	Le Sueur, Scott, Sibley	36 hr
Sep 22, 8:50 PM CDT	River Flood Watch	MPX	Dakota, Hennepin, Scott	36 hr
Sep 22, 8:50 PM CDT	River Flood Watch	MPX	Dakota, Ramsey, Washington	36 hr
Sep 22, 8:50 PM CDT	River Flood Watch	MPX	Dakota, Washington	36 hr
Sep 22, 8:51 PM CDT	Special Weather Statement	MPX	Blue Earth	39 min
Sep 22, 9:05 PM CDT	River Flood Warning	MPX	Blue Earth, Brown, Nicollet	10 days
Sep 22, 9:05 PM CDT	River Flood Warning	MPX	Redwood	15 days
Sep 22, 9:15 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth	45 min
Sep 22, 9:21 PM CDT	Areal Flood Warning	MPX	Blue Earth, Watonwan	4 hr
Sep 22, 9:27 PM CDT	Severe Thunderstorm Warning	MPX	Faribault	33 min
Sep 22, 10:36 PM CDT	Special Weather Statement	MPX	Waseca	39 min
Sep 22, 11:16 PM CDT	Areal Flood Warning	MPX	Blue Earth, Brown, Faribault, Freeborn, Le Sueur, Martin and 6 more	10 hr
Sep 23, 12:14 AM CDT	Areal Flood Warning	MPX	Goodhue	9 hr
Sep 23, 12:14 AM CDT	Special Weather Statement	MPX	Steele	31 min
Sep 23, 12:30 AM CDT	River Flood Warning	MPX	Goodhue	45 hr
Sep 23, 1:10 AM CDT	River Flood Warning	MPX	Goodhue	68 hr
Sep 23, 1:49 AM CDT	River Flood Warning	MPX	Goodhue, Olmsted	34 hr
Sep 23, 6:28 AM CDT	Flash Flood Warning	MPX	Brown, Le Sueur, Nicollet, Redwood, Watonwan	3 hr
Sep 23, 8:39 AM CDT	Flash Flood Warning	MPX	Blue Earth, Brown, Dakota, Faribault, Freeborn, Goodhue and 11 more	6 hr
Sep 23, 10:50 AM CDT	River Flood Warning	MPX	Scott	10 hr
Sep 23, 11:55 AM CDT	River Flood Warning	MPX	Blue Earth, Nicollet	10 days
Sep 23, 11:55 AM CDT	River Flood Warning	MPX	Le Sueur, Scott, Sibley	15 days
Sep 23, 11:55 AM CDT	River Flood Warning	MPX	Carver, Scott	19 days
Sep 23, 11:55 AM CDT	River Flood Warning	MPX	Carver, Hennepin, Scott	18 days
Sep 23, 11:55 AM CDT	River Flood Warning	MPX	Dakota, Hennepin, Scott	19 days
Sep 23, 12:06 PM CDT	River Flood Watch	MPX	Dakota, Goodhue	5 days
Sep 23, 12:06 PM CDT	River Flood Watch	MPX	Dakota, Goodhue	5 days
Sep 23, 2:25 PM CDT	Areal Flood Warning	MPX	Blue Earth, Brown, Dakota, Faribault, Freeborn, Goodhue and 8 more	48 hr
Sep 23, 5:28 PM CDT	Areal Flood Warning	MPX	Yellow Medicine	6 hr

Nearby

Flash Flood Warnings in Minnesota, 2010 Every flash flood warning in 2010

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.