Alert archive / Minnesota / Tornado Warnings in 2010
Tornado Warning 26, NWS Duluth, MN
NWS Duluth, MN issued this tornado warning at Jul 17, 2010, 12:49 PM CDT for Cass County, Crow Wing County, Minnesota. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 17, 2010, 12:49 PM CDT (17:49 UTC)
- Expired
- Jul 17, 2010, 1:15 PM CDT
- In force
- 26 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
Counties Cass County, MN, Crow Wing County, MN
The radar
The Duluth radar (KDLH), 152 km from the middle of the area, began a volume at 17:52 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 17, 12:28 PM CDT | Tornado Watch | SPC | 11 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 5.8 hours before the alert went out and 213 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
- 368 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 1285 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 226 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Jul 17, 12:48 PM CDT, 1 minute earlier.
Area forecast discussion, Jul 17, 12:48 PM CDT, 1 minute before
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</html>Hazardous weather outlook, Jul 17, 8:51 AM CDT, 3 hours 58 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE DULUTH MN 851 AM CDT SAT JUL 17 2010 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-181030- 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- 851 AM CDT SAT JUL 17 2010 ...THERE IS A MODERATE RISK OF SEVERE WEATHER NEAR THE BRAINERD LAKES AREA TO THE ST. CROIX RIVER VALLEY THIS AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA AND NORTHWEST WISCONSIN. .DAY ONE...TODAY AND TONIGHT THE MODERATE RISK OF SEVERE THUNDERSTORMS WILL BE FOUND WEST OF A LINE FROM HACKENSACK TO DUXBURY MINNESOTA TO HERTEL WISCONSIN. THIS AREA IS LIKELY TO ENCOUNTER THUNDERSTORMS WITH VERY LARGE HAIL AND DAMAGING WINDS. THE SLIGHT RISK OF SEVERE THUNDERSTORMS IS WEST OF A LINE FROM LITTLEFORK TO TWO HARBORS MINNESOTA...PORT WING TO PARK FALLS WISCONSIN...INCLUDING THE TWIN PORTS HARBOR. THE MAIN HAZARDS WITH ANY SEVERE STORM WILL BE LARGE HAIL AND DAMAGING WINDS. HEAVY RAIN AND FREQUENT LIGHTNING WILL ALSO ACCOMPANY THE STORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY AN UNSETTLED WEATHER PATTERN WILL REMAIN ACROSS THE REGION NEXT WEEK. THUNDERSTORMS MAY DEVELOP MONDAY THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. LSZ121-140>148-181030- 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- 851 AM CDT SAT JUL 17 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE EXPECTED TO BECOME WIDESPREAD AND MOVE ACROSS LAKE SUPERIOR LATE THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SOUTH OF A TWO HARBORS MINNESOTA TO PORT WING WISCONSIN LINE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A SLIGHT CHANCE OF THUNDERSTORMS NORTH OF GRAND MARAIS SUNDAY. AN UNSETTLED WEATHER PATTERN WILL REMAIN ACROSS THE REGION NEXT WEEK. THUNDERSTORMS MAY DEVELOP MONDAY THROUGH WEDNESDAY. GSF 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, Jul 17, 12:05 PM CDT, 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
1205 PM CDT SAT JUL 17 2010
MNZ033-034-171800-
CROW WING-SOUTH CASS-
1205 PM CDT SAT JUL 17 2010
...STRONG THUNDERSTORMS DEVELOPING ACROSS CENTRAL MINNESOTA...
AT 1159 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
RAPIDLY DEVELOPING THUNDERSTORMS 7 MILES NORTH OF POPLAR...MOVING
SOUTHEAST AT 40 MPH. ANOTHER STRONG STORM WAS LOCATED 10 MILES EAST
OF DETROIT LAKES...MOVING SOUTHEAST AT 40 MPH.
THESE STORMS ARE CAPABLE OF PRODUCING UP TO NICKEL SIZE HAIL...WIND
GUSTS UP TO 50 MPH...FREQUENT CLOUD TO GROUND LIGHTNING...BRIEF HEAVY
DOWNPOURS. PLEASE MONITOR NOAA WEATHER RADIO OR LOCAL MEDIA
OUTLETS...AS SEVERE WEATHER WARNINGS MAY BE NEEDED THIS AFTERNOON.
LOCATIONS IMPACTED THROUGH 130 PM INCLUDE...
CASINO... JENKINS... PILLAGER...
PEQUOT LAKES... LAKE SHORE... GULL LAKE...
SYLVAN... NISSWA... BREEZY POINT...
GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS
TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.
LAT...LON 4663 9479 4679 9468 4656 9381 4628 9380
4615 9390 4615 9433 4617 9438 4621 9440
4629 9436 4632 9443 4629 9454 4635 9466
4635 9473 4640 9480
LONKALocal storm report, Jul 17, 12:15 PM CDT, 34 minutes before
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</html>The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 12:05 PM CDT | Special Weather Statement | DLH | Crow Wing | 55 min |
| Jul 17, 12:17 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing | 43 min |
| Jul 17, 1:29 PM CDT | Special Weather Statement | DLH | Aitkin | 46 min |
| Jul 17, 1:51 PM CDT | Special Weather Statement | DLH | Cass | 39 min |
| Jul 17, 2:25 PM CDT | Special Weather Statement | DLH | Cass | 50 min |
| Jul 17, 2:29 PM CDT | Special Weather Statement | DLH | Crow Wing | 46 min |
| Jul 17, 3:19 PM CDT | Special Weather Statement | DLH | Aitkin | 26 min |
| Jul 17, 4:25 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Crow Wing | 50 min |
| Jul 17, 4:27 PM CDT | Severe Thunderstorm Warning | DLH | Cass | 33 min |
| Jul 17, 4:58 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 47 min |
| Jul 17, 5:11 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Crow Wing | 34 min |
| Jul 17, 5:40 PM CDT | Flash Flood Warning | DLH | Cass | 119 min |
| Jul 17, 5:40 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Crow Wing | 50 min |
| Jul 17, 5:54 PM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 36 min |
| Jul 17, 6:03 PM CDT | Special Weather Statement | DLH | Pine | 27 min |
| Jul 17, 6:31 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Crow Wing | 28 min |
| Jul 17, 6:42 PM CDT | Special Weather Statement | DLH | Pine | 33 min |
| Jul 17, 6:44 PM CDT | Special Weather Statement | DLH | Crow Wing | 46 min |
Nearby
Tornado Warnings in Minnesota, 2010Every tornado warning in 2010Tornadoes 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.