Alert archive / Minnesota / Flash Flood Warnings in 2010
Flash Flood Warning 7, NWS Duluth, MN
NWS Duluth, MN issued this flash flood warning at Aug 2, 2010, 12:58 AM CDT for Cass County, Itasca County, Saint Louis County, Minnesota. It was in force for 4 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
- Aug 2, 2010, 12:58 AM CDT (05:58 UTC)
- Expired
- Aug 2, 2010, 5:08 AM CDT
- In force
- 4 hr
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cass County, MN, Itasca County, MN, Saint Louis County, MN
The radar
The Duluth radar (KDLH), 111 km from the middle of the area, began a volume at 06:00 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, 6.0 hours before the alert went out and 278 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.
- Mixed-layer CAPE
- 1046 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1149 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 256 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.1
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 Aug 2, 12:20 AM CDT, 38 minutes earlier.
Area forecast discussion, Aug 2, 12:20 AM CDT, 38 minutes before
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</html>Hazardous weather outlook, Aug 1, 4:13 AM CDT, 20 hours 45 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DULUTH MN 413 AM CDT SUN AUG 1 2010 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-021030- KOOCHICHING-NORTHERN ST. LOUIS-NORTHERN COOK/NORTHERN LAKE- NORTHERN ITASCA-CENTRAL ST. LOUIS-SOUTHERN LAKE/LAKESHORE- SOUTHERN COOK/LAKESHORE-NORTHERN CASS-SOUTHERN ITASCA- SOUTHERN CASS-CROW WING-NORTHERN AITKIN-SOUTHERN AITKIN- CARLTON/SOUTHERN ST. LOUIS-PINE-DOUGLAS-BAYFIELD-ASHLAND-IRON- BURNETT-WASHBURN-SAWYER-PRICE- 413 AM CDT SUN AUG 1 2010 ...SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY THROUGH MONDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE EXPECTED OVER THE ENTIRE REGION TODAY AND TONIGHT. A FEW STORMS COULD BECOME SEVERE LATE THIS AFTERNOON AND EVENING...MAINLY OVER NORTHEASTERN AND NORTH CENTRAL MINNESOTA. LARGE HAIL AND DAMAGING WINDS WOULD BE THE PRIMARY HAZARDS WITH ANY SEVERE STORMS...BUT AN ISOLATED TORNADO CANNOT BE RULED OUT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE FORECAST FOR MONDAY...DIMINISHING MONDAY NIGHT. SOME OF THESE STORMS COULD BECOME SEVERE. MORE STORMS ARE POSSIBLE ON FRIDAY AND SATURDAY. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION MAY BE NEEDED FOR NORTHEASTERN MINNESOTA THIS AFTERNOON OR EVENING. LSZ121-140>148-021030- BAYFIELD TO OAK POINT WI-GRAND PORTAGE TO GRAND MARAIS MN- GRAND MARAIS TO TACONITE HARBOR MN- TACONITE HARBOR TO SILVER BAY HARBOR MN- SILVER BAY HARBOR TO TWO HARBORS MN-TWO HARBORS TO DULUTH MN- DULUTH MN TO PORT WING WI-PORT WING TO SAND ISLAND WI- SAND ISLAND TO BAYFIELD WI-OAK POINT TO SAXON HARBOR WI- 413 AM CDT SUN AUG 1 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED TODAY AND TONIGHT. A FEW STORMS COULD BECOME SEVERE LATE THIS AFTERNOON AND EVENING...MAINLY OVER THE MINNESOTA NEARSHORE WATERS. LARGE HAIL AND DAMAGING WINDS WOULD BE THE PRIMARY HAZARDS WITH ANY SEVERE STORMS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE FORECAST FOR MONDAY...DIMINISHING MONDAY NIGHT. SOME OF THESE STORMS COULD BECOME SEVERE. MORE STORMS ARE POSSIBLE ON SATURDAY. 04 MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB ADDRESS: HTTP://WWW.WEATHER.GOV/DULUTH (ALL LOWER CASE)
In the hours before
Special weather statement, Aug 1, 7:23 PM CDT, 5 hours 35 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 723 PM CDT SUN AUG 1 2010 MNZ010-018-019-026-020200- KOOCHICHING-NORTHERN ITASCA-CENTRAL ST. LOUIS-SOUTHERN ITASCA- INCLUDING THE CITIES OF...INTERNATIONAL FALLS...BIGFORK... HIBBING...GRAND RAPIDS 723 PM CDT SUN AUG 1 2010 STRONG THUNDERSTORMS WILL CONTINUE TO TRACK ACROSS MUCH OF ITASCA COUNTY...INTO CENTRAL SAINT LOUIS COUNTIES THROUGH 900 PM. THE STORMS WILL FORM AND TRACK OVER THE SAME AREAS. THE STORMS WILL PRODUCE VERY HEAVY RAINFALL...GUSTY WINDS TO 40 MPH...AND FREQUENT LIGHTNING. SOME AREAS THAT WILL BE AFFECTED INCLUDE MAX...ALVWOOD...MARCELL...BIGFORK...EFFIE...SIDE LAKE...CHISHOLM...COOK...BOWSTRING LAKE...DEER LAKE...AND STURGEON LAKE. MELDE
Special weather statement, Aug 1, 8:52 PM CDT, 4 hours 6 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
852 PM CDT SUN AUG 1 2010
MNZ025-033>036-020245-
CROW WING-NORTH CASS-NORTHERN AITKIN-SOUTH AITKIN-SOUTH CASS-
852 PM CDT SUN AUG 1 2010
...STRONG STORMS MOVING TOWARD SOUTHERN CASS AND THE BRAINERD LAKES
AREAS...
AT 845 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
LEADING EDGE OF AN AREA OF STRONG THUNDERSTORMS 40 MILES WEST OF
ESTERDY...MOVING EAST AT 30 MPH. THESE STORMS WERE MOVING TOWARD
LEADER...CASINO...POPLAR...AND PINE RIVER...AND WILL CONTINUE EAST
AND AFFECT THE BRAINERD LAKES AND LEECH LAKE AREAS AS WELL LATER
THIS EVENING.
THE STORMS ARE CAPABLE OF PRODUCING WIND GUSTS UP TO 35
MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING...AND HEAVY DOWNPOURS.
LAT...LON 4680 9481 4681 9468 4707 9468 4702 9368
4623 9359 4623 9379 4616 9380 4615 9438
4623 9440 4629 9436 4632 9443 4629 9454
4635 9466 4635 9473 4640 9480
MELDESpecial weather statement, Aug 1, 9:59 PM CDT, 2 hours 59 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 959 PM CDT SUN AUG 1 2010 MNZ018-019-026-020500- NORTHERN ITASCA-CENTRAL ST. LOUIS-SOUTHERN ITASCA- INCLUDING THE CITIES OF...BIGFORK...HIBBING...GRAND RAPIDS 959 PM CDT SUN AUG 1 2010 ...SHOWERS AND STORMS CONTINUE OVER THE IRON RANGE...WEST THROUGH ITASCA COUNTY... RADAR CONTINUED TO SHOW SHOWERS AND THUNDERSTORMS TRACKING THROUGH MUCH OF ITASCA COUNTY...EAST THROUGH CENTRAL SAINT LOUIS COUNTY THIS EVENING. THIS WILL CONTINUE FOR A FEW MORE HOURS OVER CENTRAL SAINT LOUIS COUNTY...BUT RAIN COVERAGE OVER ITASCA COUNTY SHOULD DIMINISH AFTER MIDNIGHT. THE MAIN THREAT WILL BE FOR HEAVY RAIN AND SOME FLOODING DUE TO THE PERSISTENCE OF THE RAIN. RADAR ESTIMATES 1 TO 3 INCHES OF RAIN OVER NORTHERN ITASCA AND PARTS OF WEST CENTRAL SAINT LOUIS COUNTIES. SOME AREAS THAT WILL CONTINUE TO SEE SHOWERS AND STORMS THIS EVENING INCLUDE BIGFORK...GRAND RAPIDS...MARCELL...WIRT... HIBBING...CIHSHOLM...VIRGINIA...SIDE LAKE...PENGILLY...AND BABBITT. MNZ025-033-034-020500- NORTHERN CASS-SOUTHERN CASS-CROW WING- INCLUDING THE CITIES OF...WALKER...PINE RIVER...BRAINERD 959 PM CDT SUN AUG 1 2010 ...STRONG STORMS MOVING TOWARD SOUTHERN CASS COUNTY... STRONG THUNDERSTORMS...PRODUCING HEAVY RAIN...WERE MOVING TOWARD THE POPLAR...CASINO...AND LEADER AREAS...AND WILL ARRIVE BY 1045 PM. THE STORMS WILL CONTINUE EAST TOWARD THE BRAINERD LAKES...EMILY...AND IRONTON AREAS...AND AFFECT THE WABEDO...AND HACKENSACK AREAS AS WELL. HEAVY RAIN WILL BE THE MAIN THREAT...AND SOME FLOODING MAY BE POSSIBLE AS DITCHES FILL. PONDING OF WATER ON AREA ROADS WILL ALSO BE LIKELY IN SPOTS. MELDE
Special weather statement, Aug 1, 11:51 PM CDT, 1 hour 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 1151 PM CDT SUN AUG 1 2010 MNZ018-019-026-020700- NORTHERN ITASCA-CENTRAL ST. LOUIS-SOUTHERN ITASCA- INCLUDING THE CITIES OF...BIGFORK...HIBBING...GRAND RAPIDS 1151 PM CDT SUN AUG 1 2010 ...SHOWERS AND STORMS CONTINUE OVER THE IRON RANGE...WEST THROUGH ITASCA COUNTY... RADAR CONTINUED TO SHOW SHOWERS AND THUNDERSTORMS TRACKING THROUGH MUCH OF ITASCA COUNTY...EAST THROUGH CENTRAL SAINT LOUIS COUNTY LATE THIS EVENING. THIS WILL CONTINUE FOR A FEW MORE HOURS OVER CENTRAL SAINT LOUIS COUNTY...BUT RAIN COVERAGE OVER ITASCA COUNTY SHOULD DIMINISH BY 2 AM. THE MAIN THREAT WILL BE FOR HEAVY RAIN AND SOME FLOODING DUE TO THE PERSISTENCE OF THE RAIN. RADAR ESTIMATES 1 TO 3 INCHES OF RAIN OVER NORTHERN ITASCA AND PARTS OF WEST CENTRAL SAINT LOUIS COUNTIES. SOME AREAS THAT WILL CONTINUE TO SEE SHOWERS AND STORMS INCLUDE BIGFORK...GRAND RAPIDS...MARCELL...WIRT... HIBBING...CHISHOLM...VIRGINIA...SIDE LAKE...PENGILLY...AND BABBITT. MNZ025-033>036-020700- NORTHERN CASS-SOUTHERN CASS-CROW WING-NORTHERN AITKIN- SOUTHERN AITKIN- INCLUDING THE CITIES OF...WALKER...PINE RIVER...BRAINERD... HILL CITY...AITKIN 1151 PM CDT SUN AUG 1 2010 STRONG THUNDERSTORMS WILL AFFECT THE CASINO...LEADER...POPLAR...BACKUS...WABEDO...BRAINERD LAKES...IRONTON...EMILY...AND PEQUOT LAKES THROUGH ABOUT 2 AM...WITH STORMS INCREASING OVER THE HILL CITY...AITKIN...BALSAM AND SWAN RIVER AREAS AS WELL. HEAVY RAIN WILL BE POSSIBLE IN THESE AREAS...WITH RAINFALL OF AN INCH PER HOUR POSSIBLE. SOME LOCALIZED FLOODING WILL BE POSSIBLE. MNZ037-WIZ001-020700- CARLTON/SOUTHERN ST. LOUIS-DOUGLAS- INCLUDING THE CITIES OF...DULUTH...CLOQUET...SUPERIOR 1151 PM CDT SUN AUG 1 2010 SCATTERED STRONG SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE OVER DOUGLAS...CARLTON...AND SOUTHERN SAINT LOUIS COUNTIES THROUGH THE EARLY MORNING HOURS...INCLUDING THE TWIN PORTS...CLOQUET...MAPLE...FOXBORO...CROMWELL...AND SOLON SPRINGS AREAS. HEAVY RAIN WILL BE POSSIBLE IN SPOTS...WHICH COULD LEAD TO PONDING OF WATER ON SOME ROADS. WIZ002>004-020700- BAYFIELD-ASHLAND-IRON- INCLUDING THE CITIES OF...WASHBURN...ASHLAND...HURLEY 1151 PM CDT SUN AUG 1 2010 SHOWERS AND THUNDERSTORMS WILL CONTINUE ALONG THE SOUTH SHORE OF LAKE SUPERIOR THROUGH AT LEAST 3 AM. SOME AREAS THAT WILL BE IMPACTED INCLUDE PORT WING...CORNUCOPIA...MASON...CABLE...ASHLAND...GLIDDEN...UPSON...GURNEY AND HURLEY. HEAVY RAIN WILL BE POSSIBLE WITH SOME OF THE STORMS. MELDE
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 8:14 PM CDT | Areal Flood Advisory | DLH | Cass, Itasca, Koochiching, Saint Louis | 6 hr |
| Aug 1, 8:52 PM CDT | Special Weather Statement | DLH | Cass, Crow Wing | 53 min |
| Aug 1, 10:04 PM CDT | Areal Flood Advisory | DLH | Cook, Lake, Saint Louis | 7 hr |
| Aug 2, 2:28 AM CDT | Special Weather Statement | DLH | Pine | 47 min |
| Aug 2, 3:29 PM CDT | Special Weather Statement | DLH | Koochiching | 46 min |
| Aug 2, 5:09 PM CDT | Special Weather Statement | DLH | Koochiching | 51 min |
| Aug 2, 6:04 PM CDT | Special Weather Statement | DLH | Koochiching | 41 min |
| Aug 2, 6:46 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching, Saint Louis | 59 min |
Nearby
Flash Flood Warnings in Minnesota, 2010Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.