Alert archive / Minnesota / Areal Flood Advisories in 2009

Areal Flood Advisory 4, NWS Twin Cities, MN

June 21, 2009Freeborn County, Minnesota

NWS Twin Cities, MN issued this areal flood advisory at Jun 21, 2009, 9:04 PM CDT for Freeborn County, Minnesota. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Jun 21, 2009, 9:04 PM CDT (02:04 UTC)
Expired: Jun 22, 2009, 12:51 AM CDT
In force: 4 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

County Freeborn County, MN

The radar

The Minneapolis radar (KMPX), 132 km from the middle of the area, began a volume at 02:03 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, 2.1 hours before the alert went out and 132 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: 278 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 487 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 270 m²/s²
0-3 km storm-relative helicity: 347 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.9

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 Jun 21, 6:51 PM CDT, 2 hours 13 minutes earlier.

Area forecast discussion, Jun 21, 6:51 PM CDT, 2 hours 13 minutes before

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Hazardous weather outlook, Jun 21, 1:04 PM CDT, 8 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
104 PM CDT SUN JUN 21 2009

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
221100-
DOUGLAS-TODD-MORRISON-MILLE LACS-KANABEC-STEVENS-POPE-STEARNS-
BENTON-SHERBURNE-ISANTI-CHISAGO-LAC QUI PARLE-SWIFT-CHIPPEWA-
KANDIYOHI-MEEKER-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON-
YELLOW MEDICINE-RENVILLE-MCLEOD-SIBLEY-CARVER-SCOTT-DAKOTA-
REDWOOD-BROWN-NICOLLET-LE SUEUR-RICE-GOODHUE-WATONWAN-BLUE EARTH-
WASECA-STEELE-MARTIN-FARIBAULT-FREEBORN-POLK-BARRON-RUSK-
ST. CROIX-PIERCE-DUNN-PEPIN-EAU CLAIRE-
104 PM CDT SUN JUN 21 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND
SOUTHERN MINNESOTA...AND WEST CENTRAL WISCONSIN.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A CHANCE OF ISOLATED STRONG TO SEVERE THUNDERSTORMS OVER
PARTS OF SOUTH CENTRAL MINNESOTA AND WEST CENTRAL WISCONSIN THIS
AFTERNOON AND EVENING. THE PRIMARY THREAT AREA WOULD BE GENERALLY
SOUTH OF A LINE FROM REDWOOD FALLS...TO MANKATO...TO EAU
CLAIRE. THE MAIN THREATS ARE LARGE HAIL AND HEAVY RAIN. TORNADOES
ARE ALSO POSSIBLE OVER FAR SOUTH CENTRAL MINNESOTA LATER THIS
AFTERNOON AND EARLY EVENING...IF THE ATMOSPHERE HAS ENOUGH TIME TO
DESTABILIZE BEFORE SUNSET.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THUNDERSTORM CHANCES WILL CONTINUE THROUGH THE WORK WEEK. AT THIS
TIME...THERE IS A SMALL CHANCE FOR SOME OF THESE THUNDERSTORMS TO
BECOME SEVERE...MAINLY ON TUESDAY EVENING AND NIGHT.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON AND
EVENING OVER PARTS OF SOUTH CENTRAL MINNESOTA.

In the hours before

Local storm report, Jun 21, 8:15 PM CDT, 49 minutes before

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Local storm report, Jun 21, 8:32 PM CDT, 32 minutes before

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Local storm report, Jun 21, 8:40 PM CDT, 24 minutes before

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Local storm report, Jun 21, 8:41 PM CDT, 23 minutes before

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Local storm report, Jun 21, 8:44 PM CDT, 20 minutes before

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Local storm report, Jun 21, 9:01 PM CDT, 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 7:15 PM CDT	Special Weather Statement	MPX	Waseca	45 min
Jun 21, 7:25 PM CDT	Tornado Warning	MPX	Blue Earth, Faribault, Freeborn, Waseca	65 min
Jun 21, 7:27 PM CDT	Tornado Warning	MPX	Blue Earth, Waseca	33 min
Jun 21, 8:08 PM CDT	Tornado Warning	MPX	Faribault, Freeborn	67 min
Jun 21, 8:19 PM CDT	Areal Flood Advisory	MPX	Faribault	3 hr
Jun 21, 8:28 PM CDT	Tornado Warning	MPX	Faribault, Freeborn	32 min
Jun 21, 9:07 PM CDT	Tornado Warning	MPX	Freeborn	53 min
Jun 21, 9:20 PM CDT	Tornado Warning	MPX	Freeborn	40 min
Jun 21, 9:59 PM CDT	Tornado Warning	MPX	Freeborn	34 min
Jun 21, 10:44 PM CDT	Special Weather Statement	MPX	Freeborn	31 min
Jun 22, 3:44 PM CDT	Heat Advisory	MPX	Hennepin, Ramsey	12 hr
Jun 22, 4:37 AM CDT	Flash Flood Warning	MPX	Rusk	3 hr
Jun 22, 5:03 AM CDT	Flash Flood Warning	MPX	Chippewa	3 hr
Jun 22, 7:30 AM CDT	Areal Flood Warning	MPX	Rusk	3 hr
Jun 22, 7:50 AM CDT	Areal Flood Warning	MPX	Chippewa	3 hr

Nearby

Areal Flood Advisories in Minnesota, 2009 Every areal flood advisory in 2009

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.