Alert archive / Minnesota / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 91, NWS Duluth, MN

August 9, 2005Carlton County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Aug 9, 2005, 6:30 AM CDT for Carlton County, Minnesota. It was in force for 30 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: Aug 9, 2005, 6:30 AM CDT (11:30 UTC)
Expired: Aug 9, 2005, 7:00 AM CDT
In force: 30 min
Issued by: NWS Duluth, MN
Area: Counties, with a storm outline in the text

County Carlton County, MN

The radar

The Duluth radar (KDLH), 45 km from the middle of the area, began a volume at 11:34 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
Aug 9, 12:50 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.5 hours before the alert went out and 207 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: 2923 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1597 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 5.5

Open this sounding in Storm Lab

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 Aug 9, 2:45 AM CDT, 3 hours 45 minutes earlier.

Area forecast discussion, Aug 9, 2:45 AM CDT, 3 hours 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
245 AM CDT TUE AUG 9 2005

.DISCUSSION...
LINE OF STRONG CONVECTION FROM ND INTO CENTRAL MN JUST N OF QSTNRY
BNDRY EXTENDING FROM SFC LOW IN SD INTO CN N OF LK SUP. MODELS AGREE
IN PUSHING THE FNT A LTL FARTHER S...BUT OVERRUNNING OF THE BNDRY
WILL KEEP CHCS OF TSTMS OVR CWA THRU TDA/TNGT. CHCS OF SVR WILL
DIMINISH AS AXIS OF GREATEST INSTAB SETTLES S ALG WITH THE FNTL
BNDRY...AND COOLER MORE STABLE AIR FOLLOWS IT INTO THE REGION. AFT
TDA...THE TIMING OF MINOR IMPULSES IN ZONAL FLOW ALOFT WILL BE MAIN
FCST PROB...RESULTING IN SMALL POPS EACH DAY FOR REST OF THE
WEEK...ALTHO SOME REFINEMENTS WILL UNDOUBTEDLY HAVE TO BE MADE AS WE
GET CLOSER IN TIME. MOS PRODUCTS HAVE PICKED UP ON SLGT COOLING
TREND AS CAA PATTERN SETS UP AFT FNT LEAVES THE AREA. NO MAJ
ADJUSTMENTS TO TEMP GRIDS NEEDED.

.AVIATION...
PREVAILING VFR CONDITIONS ARE EXPECTED THROUGH MOST OF THE TAF
PERIOD. A WEAK FRONT WILL SLOWLY DRIFT SE ACROSS THE UPPER MIDWEST
TODAY AND TONIGHT PRODUCING SCATTERED THUNDERSTORMS. THESE
THUNDERSTORMS WILL PRODUCE MVFR-IFR CIGS AND VSBYS...AND POSSIBLY
STRONG WINDS AND HAIL.

.DLH WATCHES/WARNINGS/ADVISORIES...

MN...NONE.
WI...NONE.

04

Hazardous weather outlook, Aug 9, 6:15 AM CDT, 15 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
615 AM CDT TUE AUG 9 2005

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-101230-
ASHLAND-BAYFIELD-BURNETT-C. ST. LOUIS-CROW WING-DOUGLAS-IRON-
KOOCHICHING-N. AITKIN-N. CASS-N. ITASCA-N. LAKE/N. COOK-N. ST. LOUIS-
PINE-PRICE-S. AITKIN-S. CASS-S. COOK/LAKESHORE-S. ITASCA-
S. LAKE/LAKESHORE-S. ST. LOUIS/CARLTON-SAWYER-WASHBURN-
615 AM CDT TUE AUG 9 2005

...SLIGHT RISK OF SEVERE STORMS TODAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEASTERN MINNESOTA AND
NORTHWESTERN WISCONSIN

.DAY ONE...TODAY AND TONIGHT

SEVERE THUNDERSTORMS WILL CONTINUE ACROSS CARLTON AND PINE COUNTIES
IN MINNESOTA...INTO NORTHWESTERN WISCONSIN THIS MORNING. A SLIGHT
CHANCE OF SEVERE THUNDERSTORMS WILL THEN EXIST ACROSS NORTHERN
WISCONSIN FOR THE REST OF TODAY AND INTO THE EARLY EVENING HOURS. THE
PRIMARY HAZARDS WILL BE LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THUNDERSTORMS ARE EXPECTED WEDNESDAY THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION IS LIKELY THIS MORNING.

&&

MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING URL:

HTTP://WWW.CRH.NOAA.GOV/DLH

04

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 10:51 PM CDT	Severe Thunderstorm Warning	DLH	Pine	42 min
Aug 9, 4:25 AM CDT	Severe Thunderstorm Warning	DLH	Cass	35 min
Aug 9, 4:32 AM CDT	Severe Thunderstorm Warning	DLH	Crow Wing	59 min
Aug 9, 5:16 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin	57 min
Aug 9, 5:24 AM CDT	Severe Thunderstorm Warning	DLH	Carlton, Pine	66 min
Aug 9, 6:02 AM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	58 min
Aug 9, 6:08 AM CDT	Special Marine Warning	DLH		67 min
Aug 9, 6:56 AM CDT	Special Marine Warning	DLH		68 min
Aug 9, 7:18 AM CDT	Special Marine Warning	DLH		29 min
Aug 9, 6:24 AM CDT	Severe Thunderstorm Warning	DLH	Douglas	60 min
Aug 9, 6:44 AM CDT	Severe Thunderstorm Warning	DLH	Bayfield	61 min
Aug 9, 6:56 AM CDT	Severe Thunderstorm Warning	DLH	Ashland, Iron	64 min
Aug 9, 7:59 AM CDT	Severe Thunderstorm Warning	DLH	Iron	27 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2005 Every severe thunderstorm warning in 2005

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.