Alert archive / Minnesota / Flash Flood Warnings in 2012

Flash Flood Warning 6, NWS Twin Cities, MN

May 27, 20124 counties in Minnesota

NWS Twin Cities, MN issued this flash flood warning at May 27, 2012, 9:53 PM CDT for 4 counties in Minnesota. It was in force for 4 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: May 27, 2012, 9:53 PM CDT (02:53 UTC)
Expired: May 28, 2012, 2:05 AM CDT
In force: 4 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Benton County, MN, Mille Lacs County, MN, Sherburne County, MN, Stearns County, MN

The radar

The Minneapolis radar (KMPX), 89 km from the middle of the area, began a volume at 02:53 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, 2.9 hours before the alert went out and 88 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: 1850 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1669 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 285 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 17.0

Open this sounding in Storm Lab

The text

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

382 
WGUS53 KMPX 280253
FFWMPX
MNC009-095-141-145-280900-
/O.NEW.KMPX.FF.W.0006.120528T0253Z-120528T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
953 PM CDT SUN MAY 27 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BENTON COUNTY IN CENTRAL MINNESOTA...
  EASTERN STEARNS COUNTY IN CENTRAL MINNESOTA...
  SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  SOUTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 400 AM CDT MONDAY

* AT 949 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. DOPPLER RADAR RAINFALL RATES ARE RANGING FROM 1 TO 2  
  INCHES AN HOUR.  ADDITIONAL RAINFALL THROUGH 6 AM MONDAY MORNING   
  COULD RANGE AROUND 2 INCHES OVER THE WARNED AREA. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MILACA...PRINCETON...ST CLOUD...ALBANY...AVON...BECKER...BIG
  LAKE...CLEAR LAKE...COLD SPRING...COLLEGEVILLE...ELK RIVER...
  FARMING...FOLEY...FORESTON...GILMAN...GLENDORADO...HOLDINGFORD...
  KIMBALL...LUXEMBURG...MAYHEW...PARENT...PAYNESVILLE...PEASE...
  PLEASANT LAKE...RICE...RICHMOND...RONNEBY...ROSCOE...SANTIAGO AND
  SARTELL.

URBAN AREAS WILL BE PARTICULARLY PRONE TO FLASH FLOODING...
ESPECIALLY WITHIN THE CITY LIMITS OF ST CLOUD...SARTELL...AND SAUK 
RAPIDS AS STORM SEWERS WILL BECOME OVERWHELMED. WATER WILL POOL IN 
LOW LYING AREAS...HIGHWAY UNDERPASSES AS WELL AS ROAD CONSTRUCTION 
AREAS. MUDSLIDES ARE ALSO POSSIBLE ESPECIALLY IN AREAS OF 
CONSTRUCTION. SMALL CREEKS AND STREAMS WILL RISE QUICKLY DUE TO THE 
INTENSE RAINFALL.

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 4580 9355 4575 9351 4530 9356 4541 9403
      4542 9405 4528 9428 4530 9438 4533 9439
      4533 9475 4578 9465 4578 9429 4579 9431
      4582 9376

$$
DFC/DWE

1 follow-up statement

061 
WGUS73 KMPX 280705
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
205 AM CDT MON MAY 28 2012

MNC009-095-141-145-280712-
/O.CAN.KMPX.FF.W.0006.000000T0000Z-120528T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BENTON MN-MILLE LACS MN-SHERBURNE MN-STEARNS MN-
205 AM CDT MON MAY 28 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN STEARNS...
SHERBURNE...SOUTHERN MILLE LACS AND BENTON COUNTIES IS CANCELLED...

AT 200 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE MAIN AREA OF INTENSE THUNDERSTORMS WITH VERY HEAVY RAINFALL 
HAS MOVED NORTHEAST OF THE AREA. HENCE THE MAIN THREAT FOR FLASH 
FLOODING HAS COME TO AN END. 

ADDITIONAL SHOWERS AND THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS 
THE AREA INTO THE EARLY MORNING HOURS...BUT RAINFALL RATES WILL 
TYPICALLY BE LESS THAN A FEW TENTHS OF AN INCH. THIS ADDITIONAL 
RAINFALL IS NOT EXPECTED TO CAUSE ADDITIONAL FLOODING. 
 
IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW 
ENFORCEMENT AGENCY.

LAT...LON 4580 9355 4575 9351 4530 9356 4541 9403
      4542 9405 4528 9428 4530 9438 4533 9439
      4533 9475 4578 9465 4578 9429 4579 9431
      4582 9376

$$

DFC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:09 PM CDT	Areal Flood Advisory	MPX	Chisago	3 hr
May 27, 7:15 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott	60 min
May 27, 7:27 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, Scott	48 min
May 27, 7:30 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Nicollet, Sibley, Watonwan	60 min
May 27, 7:39 PM CDT	Special Weather Statement	MPX	Ramsey, Washington	51 min
May 27, 7:44 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	61 min
May 27, 7:45 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin	45 min
May 27, 7:50 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Nicollet, Waseca	55 min
May 27, 7:55 PM CDT	Flash Flood Warning	MPX	Chisago	5 hr
May 27, 8:07 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Renville	53 min
May 27, 8:15 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Ramsey	34 min
May 27, 8:22 PM CDT	Areal Flood Advisory	MPX	Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and 1 more	6 hr
May 27, 8:24 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, McLeod, Scott, Wright	51 min
May 27, 8:29 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti	46 min
May 27, 8:33 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker	57 min
May 27, 8:58 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Isanti, Kanabec	62 min
May 27, 9:15 PM CDT	Special Weather Statement	MPX	Brown, Martin, Watonwan	45 min
May 27, 9:27 PM CDT	Flash Flood Warning	MPX	Blue Earth, Brown, Hennepin, McLeod, Meeker, Nicollet and 4 more	6 hr
May 27, 9:28 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Sherburne, Stearns	62 min
May 27, 9:43 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Isanti, Kanabec, Mille Lacs	62 min
May 27, 9:46 PM CDT	Flash Flood Warning	MPX	Anoka, Carver, Chisago, Dakota, Hennepin, Isanti and 2 more	6 hr
May 27, 10:02 PM CDT	Special Weather Statement	MPX	Blue Earth, Martin, Nicollet, Sibley, Waseca	43 min
May 27, 10:09 PM CDT	Special Weather Statement	MPX	Mille Lacs, Morrison	51 min
May 27, 10:19 PM CDT	Areal Flood Advisory	MPX	Kanabec, Mille Lacs, Morrison	4 hr
May 27, 10:42 PM CDT	Special Weather Statement	MPX	Dakota, Freeborn, Rice, Steele, Waseca	48 min
May 27, 11:00 PM CDT	River Flood Warning	MPX	Brown	66 hr
May 27, 11:05 PM CDT	Special Weather Statement	MPX	Dakota, Freeborn, Goodhue, Steele	40 min
May 27, 11:23 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	29 min
May 28, 12:58 AM CDT	Areal Flood Warning	MPX	Chisago	6 hr
May 28, 9:34 AM CDT	River Flood Warning	MPX	Hennepin, Wright	6 days
May 28, 1:54 PM CDT	Special Weather Statement	MPX	Benton, Stearns	66 min
May 28, 2:10 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	50 min
May 28, 2:26 PM CDT	Special Weather Statement	MPX	Benton, Mille Lacs	64 min
May 28, 2:44 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs, Morrison	61 min
May 28, 2:46 PM CDT	Severe Thunderstorm Warning	MPX	Benton	44 min
May 28, 2:48 PM CDT	Special Weather Statement	MPX	Morrison	42 min
May 28, 3:05 PM CDT	Special Weather Statement	MPX	Benton	40 min
May 28, 3:26 PM CDT	Special Weather Statement	MPX	Isanti, Kanabec, Sherburne	79 min
May 28, 3:30 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	45 min
May 28, 4:18 PM CDT	Special Weather Statement	MPX	Chisago	42 min
May 28, 4:51 PM CDT	Special Weather Statement	MPX	Chisago	24 min
May 28, 5:33 PM CDT	Special Weather Statement	MPX	Chisago	42 min

Nearby

Flash Flood Warnings in Minnesota, 2012 Every flash flood warning in 2012

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.