Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 74, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jun 10, 2007, 5:11 PM CDT for Sawyer County, Wisconsin. It was in force for 47 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
- Jun 10, 2007, 5:11 PM CDT (22:11 UTC)
- Expired
- Jun 10, 2007, 5:58 PM CDT
- In force
- 47 min
- Issued by
- NWS Duluth, MN
- Area
- Counties, with a storm outline in the text
County Sawyer County, WI
The radar
The Duluth radar (KDLH), 134 km from the middle of the area, began a volume at 22:13 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 12:00Z, 10.2 hours before the alert went out and 223 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1937 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 23 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 Jun 10, 2:37 PM CDT, 2 hours 34 minutes earlier.
Area forecast discussion, Jun 10, 2:37 PM CDT, 2 hours 34 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 237 PM CDT SUN JUN 10 2007 .DISCUSSION...LATEST RADAR IMAGERY SHOWS A WELL DEFINED LAKE BREEZE FRONT WITH INSTABILITY CU SEE ON VIS SAT. ALTHOUGH THERE IS LARGE CIN AND A LACK OF LARGE SCALE LIFT...KEEP 20-30 SCT POPS THIS EVENING AND OVERNIGHT DUE TO STRONG WAA PATTERN AND NOSE OF 30-40 KT LLJ PUSHING INTO NW MN. BY MIDNIGHT STRONG MOISTURE TRANSPORT AND THETA-E ADVCTN SHIFTS E INTO THE WRN PORTION OF THE DLH CWA. THIS INCREASING MOISTURE WILL PROVIDE ADDITIONAL INSTABILITY AND LIFT...SO A FEW STORMS COULD BECOME SEVERE /W OF INL TO BRD/...WITH LARGE HAIL AND DAMAGING WINDS AS MAIN THREATS. A THERMAL RIDGE WILL CONTINUE TO BUILD INTO THE UPPER MIDWEST OVERNIGHT...WITH INCREASING THICKNESS AND THETA-E ADVCTN. TEMPERATURES WILL REMAIN WELL ABOVE NORMAL THROUGH MID WEEK...WITH MAX TEMPS GENERALLY REACHING THE 80S...AND POSSIBLY 90 IN A FEW LOCALES. THE EXCEPTION WILL BE NEAR LAKE SUPERIOR WHERE A 10-15 KT LAKE BREEZE WILL KEEP TEMPS IN THE 60-70 RANGE ALONG THE LAKESHORE OF WRN LS. A VORT MAX WILL MOVE INTO NW MN MON AFTRN...BRINGING MODEST PVA AND OMEGA TO TRIGGER SOME TSTMS THROUGH THE LATE AFTRN/EVENING HOURS. THE THE STRONGEST LIFT AND BEST MOISTURE /DEW PTS IN THE 70/ WILL BE FOUND IN THE NW PORTION OF THE FA...WITH SCT TSTMS POSSIBLE ACROSS THE FA MONDAY NIGHT. ATTN TURNS TO MAIN BAROCLINIC ZONE AND DEEPENING LOW THAT BECOMES NEARLY STATIONARY IN THE DAKOTAS MID WEEK...SLOWLY APPROACHING THE NORTHLAND WED/THU. MODELS CONTINUE TO SLOW PROGRESSION OF THIS SYSTEM DUE TO THE STRONG OMEGA-BLOCK THAT TAKES HOLD OF CENTRAL CONUS THROUGH THE EXTENDED FCST. THE NAM IS THE FASTER OF THE MODELS...WENT CLOSER TO GFS/ECMWF FOR TIMING OF FRONT AND BETTER TSTM ACTIVITY FOR THE EXTENDED. && .AVIATION...AFTERNOON CUMULUS AND WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL DISSIPATE AT SUNSET. SKIES WILL BE CLEAR OVERNIGHT. && POINT TEMPS/POPS... DLH 55 77 60 78 / 20 20 20 20 INL 59 85 62 86 / 30 30 20 20 BRD 63 88 66 87 / 30 20 20 20 HYR 57 88 61 85 / 20 20 20 10 ASX 57 83 59 84 / 20 20 20 10 && .DLH WATCHES/WARNINGS/ADVISORIES... MN...NONE. WI...NONE. LS...NONE. GRANING/CLC
Hazardous weather outlook, Jun 10, 3:17 PM CDT, 1 hour 54 minutes before
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Severe Thunderstorm Warnings in Wisconsin, 2007Every severe thunderstorm warning in 2007
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.