Alert archive / Minnesota / Severe Thunderstorm Warnings in 2006
Severe Thunderstorm Warning 79, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jul 13, 2006, 4:27 PM CDT for Cass County, Itasca County, Minnesota. It was in force for 32 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 13, 2006, 4:27 PM CDT (21:27 UTC)
- Expired
- Jul 13, 2006, 4:59 PM CDT
- In force
- 32 min
- Issued by
- NWS Duluth, MN
- Area
- Counties, with a storm outline in the text
Counties Cass County, MN, Itasca County, MN
The radar
The Duluth radar (KDLH), 141 km from the middle of the area, began a volume at 21:30 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 13, 2:25 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.5 hours before the alert went out and 266 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
- 819 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 793 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -56 m²/s²
- 0-3 km storm-relative helicity
- -19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 13, 3:55 PM CDT, 32 minutes earlier.
Area forecast discussion, Jul 13, 3:55 PM CDT, 32 minutes before
AREA FORECAST DISCUSSION...MESOSCALE UPDATE... NATIONAL WEATHER SERVICE DULUTH MN 355 PM CDT THU JUL 13 2006 ...CONCERNING STORMS ENTERING CASS/ITASCA COUNTIES... ISOLATED DAMAGING WIND THREAT MAY BE INCREASING OVER CASS/ITASCA/ KOOCHICHING COUNTIES. ENVIRONMENTAL PARAMETERS HAVE CHANGED LITTLE SINCE PREVIOUS MESOSCALE AFD WAS ISSUED AT 306 PM. HOWEVER..STORMS JUST WEST OF LEECH LAKE HAVE CONTINUED TO SLOWLY INCREASE IN STRENGTH WHILE BECOMING BETTER ORGANIZED. COMBINATION OF VERY HIGH FREEZING/-20C LEVELS AND MARGINAL SHEAR HAS RESULTED IN MULTICELL STORM STRUCTURE. VOLUMETRIC REFL DATA FROM KDLH/KMVX INDICATES STRONGEST REFL CORES HAVE BEEN GENERALLY BELOW -20C LEVEL..SUGGESTING HIGH CONCENTRATIONS OF SMALL AND/OR MELTING HAIL MAY BE CONCENTRATED IN LOWEST HALF OF CONVECTIVE ECHOES. THIS SITUATION WOULD BE FAVORABLE FOR LOCALIZED WET MICROBUSRTS. REPORT OF 3 IN TREE BRANCHES BLOWN DOWN IN BEMIDJI JUST RECEIVED VIA FGF SEEMS TO ADD CONFIDENCE TO THIS THINKING..SO WILL NEED TO MONITOR THIS COMPLEX MOVING INTO WRN CWA VERY CLOSELY FOR NEXT 1-2 HRS. && .DLH WATCHES/WARNINGS/ADVISORIES... MN...NONE. WI...NONE. LS...NONE. MILLER
Hazardous weather outlook, Jul 13, 1:38 PM CDT, 2 hours 49 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED... NATIONAL WEATHER SERVICE DULUTH MN 138 PM CDT THU JUL 13 2006 LSZ121-140>148-162-MNZ010>012-018>021-025-026-033>038-WIZ001>004- 006>009-141200- 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- OPEN WATERS OF LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND PORTAGE MN-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- 138 PM CDT THU JUL 13 2006 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA... NORTHWEST WISCONSIN AND WESTERN LAKE SUPERIOR. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO AFFECT AREAS WEST OF A LINE ROUGHLY FROM INTERNATIONAL FALLS TO BRAINERD AFTER 4 PM. THE STRONGEST STORMS MAY REACH SEVERE LEVELS... WITH A RISK OF HAIL UP TO THE SIZE OF NICKELS AND WINDS TO 60 MPH. COVERAGE OF THUNDERSTORMS IS THEN EXPECTED TO INCREASE FROM WEST TO EAST ACROSS NORTHERN MINNESOTA... WESTERN LAKE SUPERIOR AND NORTHWEST WISCONSIN THIS EVENING AND OVERNIGHT. THE THREAT OF DIME TO NICKEL SIZE HAIL IS EXPECTED TO DIMINISH BY LATE EVENING. HOWEVER... AT LEAST A SMALL THREAT OF DAMAGING WINDS IS EXPECTED ACCOMPANY AN EASTWARD MOVING THUNDERSTORM COMPLEX WELL INTO THE OVERNIGHT HOURS... AHEAD OF AN ADVANCING COLD FRONT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS ANOTHER CHANCE OF THUNDERSTORMS SATURDAY NIGHT INTO SUNDAY MORNING AND AGAIN SUNDAY NIGHT INTO MONDAY MORNING ACROSS THE NORTHLAND. THERE IS AT LEAST A SMALL CHANCE THAT SOME STORMS MAY REACH SEVERE LEVELS. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION MAY BE NEEDED FROM LATE THIS AFTERNOON THROUGH THIS EVENING. MILLER
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 3:58 PM CDT | Severe Thunderstorm Warning | DLH | Cass | 32 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2006Every severe thunderstorm warning in 2006
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.