Alert archive / Minnesota / Flash Flood Warnings in 2008

Flash Flood Warning 1, NWS Duluth, MN

June 6, 2008Cook County, Lake County, Minnesota

NWS Duluth, MN issued this flash flood warning at Jun 6, 2008, 4:57 AM CDT for Cook County, Lake County, Minnesota. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 6, 2008, 4:57 AM CDT (09:57 UTC)
Expired: Jun 6, 2008, 11:00 AM CDT
In force: 6 hr
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Flood severity: None

Counties Cook County, MN, Lake County, MN

The radar

The Duluth radar (KDLH), 131 km from the middle of the area, began a volume at 09:59 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, 10.0 hours before the alert went out and 373 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 657 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 265 m²/s²
0-3 km storm-relative helicity: 540 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Duluth, MN wrote its last area forecast discussion before this flash flood warning went out at Jun 6, 3:33 AM CDT, 1 hour 24 minutes earlier.

Area forecast discussion, Jun 6, 3:33 AM CDT, 1 hour 24 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
333 AM CDT FRI JUN 6 2008

.DISCUSSION...
STRONG SFC LOW OVR ERN S DAK EARLY THIS MRNG TO CONT MOVG STEADILY
NNE...CROSSING INTO CN THIS AFTN. HEAVY RAIN AND EMBEDDED TSTMS CONT
TO PROPAGATE NWD...OVERRUNNING THE WFNT. RADAR COMPOSITE SHOWS SOME
EVIDENCE OF THE DRY SLOT FROM SWRN MN UP TWRD KINL AS SUGGESTED BY
THE MODELS. GFS HAS BEST DEPICTION OF THIS. CFNT EXPECTED TO PUSH
THRU ARND MIDDAY AFTER THE LOW CENTER MOVES A LITTLE FARTHER N. WITH
RADAR RAINFALL ESTIMATES APPROACHING FFG...WILL LEAVE THE FFA CONT
AS IS. WE WON/T FIND OUT MUCH ABT ANY FLOODING UNTIL PEOPLE WAKE UP
AND START CALLING IN...AND IT WILL TAKE SOME TIME FOR THE WATER TO
MAKE ITS WAY INTO THE STREAMS AND RIVERS. PSBLTY OF SVR TSTMS OVR
MAINLY ERN HALF OF OUR CWA SUPPORTED MAINLY BY LOLVL WAA AND MSTR
ADVECTION AND STRONG TRIGGER PROVIDED BY CFNT ARRIVING ABT THE TIME
OF MAX HTG. THERMODYNAMICS NOT PARTICULARLY STRONG HWVR...WITH SFC
BASED LI/S ZERO TO MINUS 2 AND SBCAPES 400-600 J/KG ARND
MIDDAY...THEN DIMINISHING RAPIDLY THRU THE AFTN AS THE CFNT PASSES.
SEE SWODY1 FOR MORE DETAILS. POPS DIMINISH RAPIDLY THIS EVE AS THE
SYSTEM MOVES INTO CN AND UPPER FLOW BECMS WEAKLY ACYC. BY SAT...CFNT
JUST TO OUR SE WILL BECM QSTNRY OR EVEN EDGE BACK TO THE N AS A WFNT
UNDER INFLUENCE OF BROAD 20-30KT LOLVL SLY WIND FIELD AND INTERACTS
WITH 110KT UPR LVL JET. IMPRESSIVE LI/S APPROACHING -10 AND SBCAPES
OVER 3000 J/KG WOULD SUPPORT THE SLGT RISK OF SVR TSTMS OVR SERN
PORTION OF OUR CWA. AFTER THAT...SEVERAL S/WVS IN SWLY FLOW WILL
KEEP MENTION OF TSRA IN FCST THRU MOST OF NEXT WEEK. SOME PAC ENERGY
IS ABSORBED BY VORTEX OVR S/CENT CN EARLY NEXT WEEK THAT DEVELOPS
INTO A CLOSED LOW ALOFT ALG ND/CN BORDER. THIS WILL GIVE US THE BEST
CHC OF ADDITIONAL PRECIP DURING MON/TUE TIMEFRAME. MODELS IN PRETTY
GOOD AGMT ON THIS.

&&

.AVIATION...
WIDESPREAD IFR CONDITIONS WITH NUMEROUS SHOWERS/TSTMS WILL CONTINUE
THIS MORNING AS AN INTENSE LOW PRESSURE SYSTEM LIFTS NORTH THROUGH
THE NORTHERN PLAINS. CIGS WILL SLOWLY IMPROVE THIS AFTERNOON TO
MVFR...HOWEVER SCT TSTMS ARE EXPECTED TO CONTINUE THROUGH LATE
AFTERNOON. IN ADDITION...STRONG AND GUSTY EASTERLY WINDS...WILL
SHIFT SOUTHERLY...THEN SOUTHWESTERLY TODAY AS A STRONG WARM FRONT
LIFTS NORTH THROUGH THE AREA. CONDITIONS SHOULD IMPROVE AND DRY OUT
TONIGHT...AS LOW PRESSURE EXITS TO THE NORTH.

&&

POINT TEMPS/POPS...
DLH  65  51  73  54 /  80  20  30  50
INL  64  51  71  49 /  70  30  10  10
BRD  70  56  76  54 /  70  10  20  30
HYR  74  58  79  57 /  80  10  40  60
ASX  68  57  78  56 /  80  20  50  60

&&

.DLH WATCHES/WARNINGS/ADVISORIES...

MN...FLASH FLOOD WATCH UNTIL 10 AM CDT THIS MORNING FOR
     CARLTON/SOUTHERN ST. LOUIS-CENTRAL ST. LOUIS-CROW WING-
     KOOCHICHING-NORTHERN AITKIN-NORTHERN CASS-NORTHERN
     COOK/NORTHERN LAKE-NORTHERN ITASCA-NORTHERN ST. LOUIS-PINE-
     SOUTHERN AITKIN-SOUTHERN CASS-SOUTHERN COOK/LAKESHORE-
     SOUTHERN ITASCA-SOUTHERN LAKE/LAKESHORE.

WI...FLASH FLOOD WATCH UNTIL 10 AM CDT THIS MORNING FOR ASHLAND-
     BAYFIELD-BURNETT-DOUGLAS-IRON-PRICE-SAWYER-WASHBURN.

LS...SMALL CRAFT ADVISORY UNTIL 4 AM CDT SATURDAY FOR LSZ121-LSZ140-
     LSZ141-LSZ142-LSZ143-LSZ144-LSZ145-LSZ146-LSZ147-LSZ148.

04/LILES

Hazardous weather outlook, Jun 6, 4:12 AM CDT, 45 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 3:20 PM CDT	Wind Advisory	DLH	Aitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 4 more	5 hr
Jun 5, 9:01 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Iron, Price	44 min

Nearby

Flash Flood Warnings in Minnesota, 2008 Every flash flood warning in 2008

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.