Alert archive / Minnesota / Flash Flood Warnings in 2010

Flash Flood Warning 18, NWS Twin Cities, MN

August 13, 20106 counties in Minnesota

NWS Twin Cities, MN issued this flash flood warning at Aug 13, 2010, 2:09 AM CDT for 6 counties in Minnesota. It was in force for 3 hr. 5 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: Aug 13, 2010, 2:09 AM CDT (07:09 UTC)
Expired: Aug 13, 2010, 5:00 AM CDT
In force: 3 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Carver County, MN, Dakota County, MN, Hennepin County, MN, Ramsey County, MN, Scott County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 34 km from the middle of the area, began a volume at 07:12 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
Aug 13, 2:15 AM CDT	FLASH FLOOD	Chaska, MN	4 FEET OF WATER FLOWING OVER INTERSECTION.
Aug 13, 2:27 AM CDT	FLASH FLOOD	Carver, MN	MOST OF THE CITY STREETS HAVE 8 INCHES OF WATER COVERING.
Aug 13, 2:44 AM CDT	FLASH FLOOD	Minnetonka, MN	12 INCHES WATER COVERING HIGHWAY 7.
Aug 13, 2:55 AM CDT	FLASH FLOOD	Belle Plaine, MN	STREET FLOODING.
Aug 13, 3:30 AM CDT	FLASH FLOOD	Apple Valley, MN	STREET FLOODING UP TO CAR DOORS.

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, 7.2 hours before the alert went out and 36 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: 3684 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1076 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

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

297 
WGUS53 KMPX 130709
FFWMPX
MNC019-037-053-123-139-163-131000-
/O.NEW.KMPX.FF.W.0018.100813T0709Z-100813T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
209 AM CDT FRI AUG 13 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN CARVER COUNTY IN EAST CENTRAL MINNESOTA...
  HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  SCOTT COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 500 AM CDT

* AT 207 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS PRODUCING TORRENTIAL RAINS TRACKING ACROSS THE TWIN  
  CITIES METRO. RAINFALL OF 1 TO 2 INCHES COULD FALL IN LESS THAN AN 
  HOUR CAUSING FLOODING.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MINNEAPOLIS...ST PAUL...APPLE VALLEY...ARDEN HILLS...BELLE
  PLAINE...BLOOMINGTON...BROOKLYN CENTER...BURNSVILLE...CARVER...
  CASTLE ROCK...CHANHASSEN...CHASKA...COATES...COTTAGE GROVE...CREDIT
  RIVER...CRYSTAL...CRYSTAL BAY...DEEPHAVEN...EAGAN...EDEN PRAIRIE...
  EDINA...ELKO...EXCELSIOR...FALCON HEIGHTS...FARMINGTON...GOLDEN
  VALLEY...HAMEL...HAMPTON...HASTINGS AND HELENA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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 4452 9329 4454 9329 4455 9377 4506 9377
      4507 9327 4504 9327 4504 9324 4508 9323
      4508 9279 4478 9278 4475 9280 4473 9278
      4463 9278 4459 9280 4451 9322

$$

BAP

1 follow-up statement

595 
WGUS73 KMPX 130956
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
456 AM CDT FRI AUG 13 2010

MNC019-037-053-123-139-163-131000-
/O.CON.KMPX.FF.W.0018.000000T0000Z-100813T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON MN-HENNEPIN MN-RAMSEY MN-CARVER MN-DAKOTA MN-SCOTT MN-
456 AM CDT FRI AUG 13 2010

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SCOTT...DAKOTA...
SOUTHEASTERN CARVER...RAMSEY...SOUTHERN HENNEPIN AND SOUTHERN
WASHINGTON COUNTIES UNTIL 500 AM CDT...

AT 452 AM CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE 
THUNDERSTORMS WITH VERY HEAVY RAIN MOVING ACROSS THE TWIN CITIES 
METRO AREA. THE REMAINING STORMS ARE NOT AS INTENSE AS EARLIER THIS 
MORNING...AND ARE MOVING EAST MORE RAPIDLY. 

THE WARNING WILL BE ALLOWED TO EXPIRE AT 5 AM. IF MORE DEVELOPMENT 
OCCURS LATER THIS MORNING...A NEW WARNING MAY NE NEEDED. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL COULD FLASH FLOODING TO 
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING  
INCLUDE...MINNEAPOLIS...ST PAUL...APPLE VALLEY...ARDEN HILLS...BELLE 
PLAINE...BLOOMINGTON...BURNSVILLE...CARVER...CASTLE 
ROCK...CHANHASSEN...CHASKA...COATES...COTTAGE GROVE...CREDIT 
RIVER...CRYSTAL...CRYSTAL BAY...DEEPHAVEN...EAGAN...EDEN 
PRAIRIE...EDINA...ELKO...EXCELSIOR...FALCON 
HEIGHTS...FARMINGTON...GOLDEN 
VALLEY...HAMEL...HAMPTON...HASTINGS...AND HOPKINS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 4452 9329 4454 9329 4455 9377 4506 9377
      4507 9327 4504 9327 4504 9324 4508 9323
      4508 9279 4478 9278 4475 9280 4473 9278
      4463 9278 4459 9280 4451 9322

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 7:02 PM CDT	Tornado Warning	MPX	Swift	43 min
Aug 12, 7:10 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns, Swift	65 min
Aug 12, 7:20 PM CDT	Severe Thunderstorm Warning	MPX	Stearns, Todd	40 min
Aug 12, 7:25 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, McLeod, Meeker, Sherburne, Sibley and 1 more	50 min
Aug 12, 7:36 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	24 min
Aug 12, 7:43 PM CDT	Special Weather Statement	MPX	Le Sueur, Rice, Scott	47 min
Aug 12, 7:58 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Sherburne, Stearns, Todd	62 min
Aug 12, 8:08 PM CDT	Special Weather Statement	MPX	Anoka, Isanti, Ramsey	37 min
Aug 12, 8:14 PM CDT	Tornado Warning	MPX	Benton, Sherburne, Stearns	25 min
Aug 12, 8:28 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Isanti, Kanabec, Mille Lacs, Morrison	62 min
Aug 12, 8:44 PM CDT	Severe Thunderstorm Warning	MPX	Chisago, Isanti	46 min
Aug 12, 10:15 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Renville, Yellow Medicine	60 min
Aug 12, 10:57 PM CDT	Areal Flood Advisory	MPX	Brown, Chippewa, Kandiyohi, Lac qui Parle, Meeker, Nicollet and 8 more	6 hr
Aug 12, 11:03 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Renville, Yellow Medicine	57 min
Aug 12, 11:25 PM CDT	Flash Flood Warning	MPX	Chippewa, Kandiyohi, Lac qui Parle, Renville, Yellow Medicine	3 hr
Aug 12, 11:28 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville, Yellow Medicine	47 min
Aug 13, 12:10 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Martin, Watonwan	65 min
Aug 13, 12:13 AM CDT	Flash Flood Warning	MPX	McLeod, Meeker, Renville, Sibley, Wright	3 hr
Aug 13, 12:28 AM CDT	Severe Thunderstorm Warning	MPX	McLeod, Meeker, Renville	62 min
Aug 13, 12:44 AM CDT	Areal Flood Advisory	MPX	Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and 3 more	3 hr
Aug 13, 1:05 AM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Scott, Sibley	55 min
Aug 13, 1:12 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Nicollet, Waseca	63 min
Aug 13, 1:50 AM CDT	Special Weather Statement	MPX	Anoka, Dakota, Hennepin, Ramsey, Rice, Washington	70 min
Aug 13, 1:56 AM CDT	Areal Flood Advisory	MPX	Blue Earth, Le Sueur, Nicollet, Rice, Sibley, Steele and 1 more	3 hr
Aug 13, 2:09 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Rice, Steele, Waseca	66 min
Aug 13, 2:52 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue	53 min
Aug 13, 3:14 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Rice, Steele	61 min
Aug 13, 3:30 AM CDT	Flash Flood Warning	MPX	Goodhue	3 hr
Aug 13, 3:41 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Washington	64 min
Aug 13, 3:55 AM CDT	Tornado Warning	MPX	Goodhue	18 min
Aug 13, 4:11 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Le Sueur, Rice, Scott, Washington	64 min
Aug 13, 4:26 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Carver, Dakota, Hennepin, McLeod, Ramsey and 4 more	64 min
Aug 13, 4:38 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Washington	67 min
Aug 13, 5:25 AM CDT	Special Weather Statement	MPX	Pope	50 min
Aug 13, 5:38 AM CDT	Severe Thunderstorm Warning	MPX	Pope, Stevens, Swift	52 min
Aug 13, 6:10 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns, Swift	50 min
Aug 13, 6:52 AM CDT	Special Weather Statement	MPX	Meeker	53 min
Aug 13, 1:05 PM CDT	Special Weather Statement	MPX	Isanti	40 min
Aug 13, 1:46 PM CDT	Special Weather Statement	MPX	Stearns	29 min
Aug 13, 2:13 PM CDT	Tornado Warning	MPX	Chisago	17 min
Aug 13, 2:25 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Meeker, Morrison, Sherburne, Stearns, Todd and 1 more	65 min
Aug 13, 2:37 PM CDT	Special Weather Statement	MPX	Carver, McLeod, Nicollet, Sibley	23 min
Aug 13, 2:53 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Sibley, Wright	52 min
Aug 13, 3:01 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs, Morrison, Sherburne, Stearns, Wright	59 min
Aug 13, 3:19 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Chisago, Isanti, Kanabec, Mille Lacs, Morrison and 1 more	56 min
Aug 13, 4:34 PM CDT	Special Weather Statement	MPX	McLeod, Sherburne, Wright	41 min
Aug 13, 4:36 PM CDT	Special Weather Statement	MPX	McLeod, Sherburne, Wright	39 min
Aug 13, 5:34 PM CDT	Tornado Warning	MPX	Blue Earth, Le Sueur, Waseca	56 min
Aug 13, 5:36 PM CDT	Severe Thunderstorm Warning	MPX	Washington	54 min
Aug 13, 5:40 PM CDT	Areal Flood Warning	MPX	Goodhue	6 hr
Aug 13, 6:13 PM CDT	Flash Flood Warning	MPX	Dakota	66 min

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.