Alert archive / Minnesota / Areal Flood Advisories in 2011

Areal Flood Advisory 17, NWS Twin Cities, MN

July 5, 2011Lac qui Parle County, Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this areal flood advisory at Jul 5, 2011, 7:06 AM CDT for Lac qui Parle County, Yellow Medicine County, Minnesota. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jul 5, 2011, 7:06 AM CDT (12:06 UTC)
Expired: Jul 5, 2011, 10:00 AM CDT
In force: 3 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Lac qui Parle County, MN, Yellow Medicine County, MN

The radar

The Sioux Falls radar (KFSD), 152 km from the middle of the area, began a volume at 12:06 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 12:00Z, 0.1 hours before the alert went out and 191 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: 247 J/kg
Mixed-layer CIN: -274 J/kg
Mixed-layer LCL: 1040 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 215 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this areal flood advisory went out at Jul 5, 6:58 AM CDT, 8 minutes earlier.

Area forecast discussion, Jul 5, 6:58 AM CDT, 8 minutes before

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Hazardous weather outlook, Jul 5, 5:10 AM CDT, 1 hour 56 minutes before

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In the hours before

Special weather statement, Jul 5, 2:14 AM CDT, 4 hours 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
214 AM CDT TUE JUL 5 2011

MNZ041-048-049-054>058-064-065-073-050830-
CHIPPEWA-DOUGLAS-KANDIYOHI-LAC QUI
PARLE-MEEKER-POPE-REDWOOD-RENVILLE-STEARNS-SWIFT-YELLOW MEDICINE-
214 AM CDT TUE JUL 5 2011

...THUNDERSTORMS MOVING INTO/DEVELOPING OVER CHIPPEWA...DOUGLAS...
KANDIYOHI...LAC QUI PARLE...MEEKER...POPE...REDWOOD...RENVILLE...
STEARNS...SWIFT AND YELLOW MEDICINE COUNTIES THROUGH 330 AM CDT...

AT 209 AM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 4 MILES SOUTHWEST OF ELROSA
TO DE GRAFF TO BOYD. THESE STORMS WERE MOVING SOUTHEASTEAST AT 25 MPH.

HAIL UP TO DIME SIZE AND WINDS UP TO 50 MPH ARE EXPECTED WITH THESE
STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  SUNBURG.
  MEIRE GROVE.
  GREENWALD.
  SPRING HILL.
  KERKHOVEN.
  NEW MUNICH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 4515 9645 4516 9592 4576 9542 4577 9428
      4533 9474 4450 9488 4457 9561 4462 9562
      4462 9611 4465 9645
TIME...MOT...LOC 0713Z 281DEG 17KT 4551 9496 4523 9544
          4484 9586

Special weather statement, Jul 5, 5:05 AM CDT, 2 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
505 AM CDT TUE JUL 5 2011

MNZ041-047-048-055-051100-
DOUGLAS-POPE-STEVENS-SWIFT-
505 AM CDT TUE JUL 5 2011

...THUNDERSTORMS MOVING INTO/DEVELOPING OVER DOUGLAS...POPE...STEVENS
AND SWIFT COUNTIES THROUGH 600 AM CDT...

AT 503 AM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR ELBOW LAKE TO
CORRELL. THESE STORMS WERE MOVING SOUTHEAST AT 50 MPH.

WINDS UP TO 45 MPH HAVE BEEN OBSERVED ALREADY AND ARE EXPECTED IN
PLACES WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  MORRIS.
  ALEXANDRIA.
  KENSINGTON.
  FARWELL.
  LOWRY.
  FORADA.
  APPLETON.
  BENSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE ALSO LIKELY FROM THESE
THUNDERSTORMS. THIS MAY RESULT IN BRIEF RUNOFF PROBLEMS AND PONDING
OF WATER ON AREA ROADWAYS.

THE GUSTY WINDS WILL BE CAPABLE OF KNOCKING DOWN SMALL TREES...TREE
LIMBS...AND POWERLINES. SEEK SAFE SHELTER UNTIL THE STORM HAS PASSED.

&&

LAT...LON 4576 9627 4577 9577 4595 9578 4588 9534
      4526 9525 4516 9525 4515 9603 4517 9609
      4519 9612 4523 9611 4524 9613 4540 9613
      4542 9625
TIME...MOT...LOC 1003Z 302DEG 47KT 4586 9589 4518 9618

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 10:33 PM CDT	Special Weather Statement	MPX	Douglas	117 min
Jul 4, 11:54 PM CDT	Special Weather Statement	MPX	Douglas, Pope, Stevens, Todd	96 min
Jul 5, 12:35 AM CDT	Severe Thunderstorm Warning	MPX	Stevens	55 min
Jul 5, 1:20 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle	55 min
Jul 5, 2:14 AM CDT	Special Weather Statement	MPX	Chippewa, Kandiyohi, Lac qui Parle, Pope, Renville, Stearns and 2 more	76 min
Jul 5, 3:50 AM CDT	Areal Flood Advisory	MPX	Lac qui Parle, Yellow Medicine	3 hr
Jul 5, 4:56 AM CDT	Areal Flood Advisory	MPX	Stevens, Swift	4 hr
Jul 5, 5:05 AM CDT	Special Weather Statement	MPX	Pope, Stevens, Swift	55 min
Jul 5, 6:26 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Ramsey, Washington	32 min

Nearby

Areal Flood Advisories in Minnesota, 2011 Every areal flood advisory in 2011

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.