Alert archive / Minnesota / Flash Flood Warnings in 2010

Flash Flood Warning 4, NWS Twin Cities, MN

June 25, 20104 counties in Minnesota

NWS Twin Cities, MN issued this flash flood warning at Jun 25, 2010, 6:24 PM CDT for 4 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: Jun 25, 2010, 6:24 PM CDT (23:24 UTC)
Expired: Jun 25, 2010, 9:30 PM CDT
In force: 3 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Anoka County, MN, Hennepin County, MN, Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 37 km from the middle of the area, began a volume at 23:27 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
Jun 25, 6:47 PM CDT	FLASH FLOOD	2 W Maple Grove, MN	OVER 2 FEET OF WATER ON STREETS
Jun 25, 7:08 PM CDT	FLASH FLOOD	Medicine Lake, MN	MEDICINE LAKE AND HWY 169 4 FEET OF WATER AND CARS ARE STALLED IN WATER
Jun 25, 7:30 PM CDT	FLASH FLOOD	New Hope, MN	2.5 RAIN GENERAL STREET FLOODING / PONDING AND FLOWING WATER.
Jun 25, 7:43 PM CDT	FLASH FLOOD	Blaine, MN	242 AND HWY 65 ESTIMATED 1 FOOT TREES AND 8 INCH BRANCHES DOWN
Jun 25, 8:20 PM CDT	FLASH FLOOD	2 Sw Maple Grove, MN	WATER TO CAR DOORS, OVER RUNNING CURB ON 69TH PLACE N.

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 12:00Z, 11.4 hours before the alert went out and 40 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: 38 J/kg
Mixed-layer CIN: -225 J/kg
Mixed-layer LCL: 1153 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 119 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.

195 
WGUS53 KMPX 252324
FFWMPX
MNC003-053-123-163-260230-
/O.NEW.KMPX.FF.W.0004.100625T2324Z-100626T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
624 PM CDT FRI JUN 25 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  WEST CENTRAL WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 930 PM CDT

* AT 621 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
  RAINFALL RATES IN EXCESS OF AN INCH AND A HALF PER HOUR WILL LEAD
  TO TOTALS IN EXCESS OF TWO INCHES IN SOME LOCATIONS. LOCALIZED 
  STREET FLOODING HAS BEEN REPORTED IN URBAN AREAS OF MINNEAPOLIS.
  
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MINNEAPOLIS...ST PAUL...ARDEN HILLS...BLAINE...BROOKLYN CENTER...
  CENTERVILLE...COLUMBIA HEIGHTS...COON RAPIDS...CRYSTAL...FALCON
  HEIGHTS...FRIDLEY...GOLDEN VALLEY...HUGO...LITTLE CANADA...
  MAHTOMEDI...MAPLE GROVE...MAPLEWOOD...MEDICINE LAKE AND MINNETONKA.

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.

&&

LAT...LON 4517 9294 4489 9292 4489 9302 4494 9307
      4494 9310 4490 9315 4490 9317 4491 9355
      4520 9348

$$

2 follow-up statements

657 
WGUS73 KMPX 260046
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
746 PM CDT FRI JUN 25 2010

MNC003-053-123-163-260230-
/O.CON.KMPX.FF.W.0004.000000T0000Z-100626T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ANOKA MN-WASHINGTON MN-HENNEPIN MN-RAMSEY MN-
746 PM CDT FRI JUN 25 2010

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR RAMSEY...EASTERN
HENNEPIN...WEST CENTRAL WASHINGTON AND SOUTHEASTERN ANOKA COUNTIES
UNTIL 930 PM CDT...

AT 742 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE HEAVIER RAINS WERE MOVING OUT OF THE SOUTHEAST METRO. A
FEW ADDITIONAL SHOWERS OR THUNDERSTORMS ARE POSSIBLE... BUT NO 
SIGNIFICANT ADDITIONAL RAINFALL IS EXPECTED. AS A RESULT...
FLOODING OF ROADS AND SMALL STREAMS MAY REMAIN HIGH THROUGH
900 PM CDT... BUT CONDITIONS SHOULD IMPROVE AFTER THAT POINT. IF
WATERS RECEDE SOONER...THE FLASH FLOOD WARNING WILL BE CANCELED.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MINNEAPOLIS...ST PAUL...BROOKLYN PARK...COLUMBIA
HEIGHTS...CRYSTAL...DAYTON...FALCON HEIGHTS...FRIDLEY...GOLDEN 
VALLEY...HUGO...LAUDERDALE...LINO LAKES...LITTLE CANADA...
MAHTOMEDI...MAPLE GROVE...MAPLEWOOD...MEDICINE LAKE AND MINNETONKA.

NUMEROUS REPORTS OF FLOODING OF ROADS AROUND THE METRO AREA HAVE 
BEEN RECEIVED.

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 4517 9294 4489 9292 4489 9302 4494 9307
      4494 9310 4490 9315 4490 9317 4491 9355
      4520 9348

$$

397 
WGUS73 KMPX 260228
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
928 PM CDT FRI JUN 25 2010

MNC003-053-123-163-260238-
/O.EXP.KMPX.FF.W.0004.000000T0000Z-100626T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ANOKA MN-WASHINGTON MN-HENNEPIN MN-RAMSEY MN-
928 PM CDT FRI JUN 25 2010

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR RAMSEY...EASTERN
HENNEPIN...WEST CENTRAL WASHINGTON AND SOUTHEASTERN ANOKA COUNTIES
WILL BE ALLOWED TO EXPIRE AT 930 PM CDT...

THE THUNDERSTORMS THAT CAUSED THE HEAVY RAIN THIS EVENING HAVE 
MOVED OUT OF THE AREA...AND NO ADDITIONAL THUNDERSTORMS 
ARE EXPECTED TO DEVELOP. SOME PONDING OF WATER IN LOW SPOTS MAY 
STILL BE FOUND FOR AN HOUR OR SO. IF FLOODING HAS BEEN 
OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4517 9294 4489 9292 4489 9302 4494 9307
      4494 9310 4490 9315 4490 9317 4491 9355
      4520 9348

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 6:07 AM CDT	Special Weather Statement	MPX	Douglas, Morrison, Todd	68 min
Jun 25, 6:45 AM CDT	Special Weather Statement	MPX	Douglas, Pope, Stevens	60 min
Jun 25, 8:39 AM CDT	Special Weather Statement	MPX	Stevens	51 min
Jun 25, 9:25 AM CDT	Special Weather Statement	MPX	Chippewa, Swift	65 min
Jun 25, 9:36 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Swift	39 min
Jun 25, 11:00 AM CDT	Special Weather Statement	MPX	Redwood, Renville	60 min
Jun 25, 11:04 AM CDT	Special Weather Statement	MPX	Kanabec	56 min
Jun 25, 11:07 AM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville, Sibley	53 min
Jun 25, 12:35 PM CDT	Special Weather Statement	MPX	Le Sueur, Nicollet	55 min
Jun 25, 3:12 PM CDT	Special Weather Statement	MPX	Chippewa, Kandiyohi, Lac qui Parle, Meeker, Pope, Redwood and 4 more	63 min
Jun 25, 3:31 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Pope, Stearns, Swift	59 min
Jun 25, 3:35 PM CDT	Tornado Warning	MPX	Chippewa, Lac qui Parle, Renville, Yellow Medicine	55 min
Jun 25, 3:51 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Swift	54 min
Jun 25, 4:05 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne, Stearns, Wright	55 min
Jun 25, 4:33 PM CDT	Tornado Warning	MPX	Chippewa, Kandiyohi	57 min
Jun 25, 4:41 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	49 min
Jun 25, 4:56 PM CDT	Tornado Warning	MPX	Chippewa, Renville	49 min
Jun 25, 5:00 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Hennepin, Isanti, Sherburne, Stearns and 1 more	60 min
Jun 25, 5:03 PM CDT	Tornado Warning	MPX	Brown, Nicollet, Redwood, Renville, Sibley, Yellow Medicine	27 min
Jun 25, 5:04 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	33 min
Jun 25, 5:08 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Ramsey, Wright	67 min
Jun 25, 5:21 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, McLeod, Meeker, Renville, Sibley	54 min
Jun 25, 5:31 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Renville, Stearns, Swift	59 min
Jun 25, 5:33 PM CDT	Tornado Warning	MPX	Brown, Nicollet, Redwood, Renville, Sibley	42 min
Jun 25, 5:37 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Redwood, Renville, Sibley, Yellow Medicine	53 min
Jun 25, 5:51 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Dakota, Hennepin, Ramsey, Washington	54 min
Jun 25, 5:59 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Sherburne, Wright	42 min
Jun 25, 6:05 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Nicollet, Watonwan	55 min
Jun 25, 6:08 PM CDT	Tornado Warning	MPX	Blue Earth, Brown, Nicollet, Sibley	52 min
Jun 25, 6:12 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Wright	63 min
Jun 25, 6:28 PM CDT	Tornado Warning	MPX	Blue Earth, Brown, Nicollet	47 min
Jun 25, 6:30 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Dakota, Hennepin, Ramsey	60 min
Jun 25, 6:34 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	56 min
Jun 25, 6:51 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin	24 min
Jun 25, 6:52 PM CDT	Tornado Warning	MPX	Blue Earth, Le Sueur, Nicollet	53 min
Jun 25, 6:54 PM CDT	Tornado Warning	MPX	Brown, Redwood	51 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.