Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 182, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Sep 24, 2007, 4:34 PM CDT for Carlton County, Saint Louis County, Minnesota. It was in force for 41 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
- Sep 24, 2007, 4:34 PM CDT (21:34 UTC)
- Expired
- Sep 24, 2007, 5:15 PM CDT
- In force
- 41 min
- Issued by
- NWS Duluth, MN
- Area
- Counties, with a storm outline in the text
Counties Carlton County, MN, Saint Louis County, MN
The radar
The Duluth radar (KDLH), 39 km from the middle of the area, began a volume at 21:36 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, 9.6 hours before the alert went out and 262 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
- 176 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 899 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 90 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 Sep 24, 3:26 PM CDT, 1 hour 8 minutes earlier.
Area forecast discussion, Sep 24, 3:26 PM CDT, 1 hour 8 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 326 PM CDT MON SEP 24 2007 .DISCUSSION...A BROKEN LINE OF SHOWERS AND THUNDERSTORMS HAS DEVELOPED ALONG A COLD FRONT...AND CONTINUES TO PROGRESS EWRD ACROSS MINNESOTA THIS AFTERNOON. FARTHER EAST...SCATTERED TO ISOLATED SHOWERS AND STORMS HAVE DEVELOPED AS WELL AHEAD OF THE FRONT. THIS ACTIVITY SHOULD CONTINUE TO INCREASE IN COVERAGE ACROSS OUR CWA LATE THIS AFTERNOON AND EARLY THIS EVENING...AS THE FRONT MOVES OVER OUR CWA PROVIDING MORE LIFT. BOTH THE GFS AND NAM HAVE COME INTO BETTER AGREEMENT WITH THEIR PRECIP FIELDS...SHOWING THE HEAVIEST PRECIP AMOUNTS FALLING THIS AFTERNOON AND EVENING ACROSS THE MN PORTION OF OUR CWA AND OUR WRN WI ZONES. PREVIOUS MODEL RUNS...ESPECIALLY FROM THE NAM PRODUCED THE HEAVIEST PRECIP ACROSS NWRN WI THIS EVENING. THE HIGHEST RISK FOR SEVERE THUNDERSTORMS...WHICH IS SLIGHT...WILL BE ACROSS OUR SRN ZONES THROUGH THIS EVENING AS OUTLINED IN SWODY1. BY EARLY TUESDAY MORNING...THE FRONT WILL REACH THE ERN BORDER OF OUR CWA...THEN MOVE OVER ERN WI AND UPPER MICHIGAN TUESDAY AFTERNOON. EVEN WITH CAA OCCURRING ACROSS OUR CWA...AN UPPER LEVEL SHORTWAVE WILL TAP RESIDUAL LOW-LEVEL MOISTURE TO PRODUCE SCATTERED SHOWERS ACROSS MUCH OF OUR FCST AREA LATE TONIGHT AND TUESDAY MORNING. DRIER AIR WILL ADVECT EAST ACROSS THE NORTHLAND TOMORROW AFTERNOON AND NIGHT...ENDING MOST IF NOT ALL OF THE SHOWER ACTIVITY. A SECOND WEAK DISTURBANCE WILL FOLLOW ON WEDNESDAY...WHICH COULD PRODUCE SCATTERED PRECIP ACROSS THE NORTHLAND WEDNESDAY AND WEDNESDAY NIGHT. AFTER MUCH ABOVE TO MUCH ABOVE NORMAL TEMPS TODAY...READINGS WILL TUMBLE DOWN INTO THE UPPER 50S AND LOWER 60S FOR HIGHS TUESDAY AND WEDNESDAY. && .AVIATION...A COLD FRONT WILL PUSH FROM WEST TO EAST ACROSS NORTHEAST MINNESOTA THIS EVENING...AND ACROSS NORTHWEST WISCONSIN OVERNIGHT. NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED TO ALONG AND AHEAD OF THIS FRONT. WIDESPREAD MVFR CONDITIONS ARE EXPECTED TO PERSIST TONIGHT WITH AREAS OF IFR CONDITIONS IN SHOWERS AND THUNDERSTORMS. WINDS WILL SWITCH TO THE NORTHWEST BEHIND THE COLD FRONT TONIGHT. SOME POST FRONTAL SHOWERS WILL BE POSSIBLE TUESDAY MORNING...MOVING FROM WEST TO EAST ACROSS THE NORTHLAND. && POINT TEMPS/POPS... DLH 50 57 37 62 / 80 20 10 30 INL 44 55 35 62 / 60 20 10 30 BRD 50 58 38 65 / 50 10 10 30 HYR 54 60 35 64 / 90 30 10 20 ASX 55 61 39 63 / 80 40 20 20 && .DLH WATCHES/WARNINGS/ADVISORIES... MN...NONE. WI...NONE. LS...NONE. BERDES/LILES
Hazardous weather outlook, Sep 24, 3:45 AM CDT, 12 hours 49 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DULUTH MN 345 AM CDT MON SEP 24 2007 LSZ121-140>148-162-MNZ010>012-018>021-025-026-033>038-WIZ001>004- 006>009-251030- 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- 345 AM CDT MON SEP 24 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA... NORTHWEST WISCONSIN AND WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL BECOME NUMEROUS ACROSS THE NORTHLAND TODAY... AND WILL CONTINUE INTO TONIGHT AS WELL. WHILE THE SLIGHT RISK OF SEVERE THUNDERSTORMS IS JUST SOUTHWEST OF OUR AREA...AN ISOLATED SEVERE THUNDERSTORM IS POSSIBLE THIS AFTERNOON AND EVENING. THE MAIN THREAT WOULD BE HIGH WINDS AND POSSIBLY SOME LARGE HAIL. LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE...AND WILL BE CLOSELY MONITORED DUE TO THE HEAVY RAIN THAT HAS RECENTLY FALLEN. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A CHANCE OF THUNDERSTORMS TUESDAY NIGHT INTO THURSDAY MORNING...AND AGAIN FROM FRIDAY NIGHT THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT. DAP
In the hours before
Local storm report, Sep 24, 4:24 PM CDT, 10 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 |
|---|---|---|---|---|
| Sep 24, 3:56 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Saint Louis | 49 min |
| Sep 24, 5:12 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 48 min |
| Sep 24, 5:16 PM CDT | Special Marine Warning | DLH | 59 min | |
| Sep 24, 5:21 PM CDT | Special Marine Warning | DLH | 39 min | |
| Sep 24, 6:13 PM CDT | Special Marine Warning | DLH | 62 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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.