Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 85, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Aug 8, 2015, 4:06 PM CDT for Lake County, Saint Louis County, Minnesota. It was in force for 24 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 8, 2015, 4:06 PM CDT (21:06 UTC)
- Expired
- Aug 8, 2015, 4:30 PM CDT
- In force
- 24 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Lake County, MN, Saint Louis County, MN
The radar
The Duluth radar (KDLH), 83 km from the middle of the area, began a volume at 21:07 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 8, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 9.1 hours before the alert went out and 152 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
- 452 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 982 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 183 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
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 8, 4:03 PM CDT, 3 minutes earlier.
Area forecast discussion, Aug 8, 4:03 PM CDT, 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 403 PM CDT SAT AUG 8 2015 .SHORT TERM...(THIS EVENING THROUGH SUNDAY) ISSUED AT 402 PM CDT SAT AUG 8 2015 ANOTHER STORMY DAY ACROSS THE NORTHLAND AHEAD OF A COLD FRONT. SCATTERED THUNDERSTORMS ARE EXPECTED TO MOVE ACROSS NORTHEAST MINNESOTA THIS AFTERNOON...INTO WESTERN LAKE SUPERIOR...AND NORTHWEST WISCONSIN THIS EVENING. SOME STRONG TO SEVERE STORMS WILL BE POSSIBLE...BUT LACK OF A STRONG CAP MAY PREVENT WIDESPREAD SEVERE WEATHER. HOWEVER...DEEP LAYER SHEAR OF 35 TO 45 KTS AND MUCAPE OVER 2000 J/KG WILL PRODUCE STORMS CAPABLE OF LARGE HAIL. COLD FRONT MOVES THROUGH TONIGHT LEADING TO SOME CLEARING SKIES IN FAR NORTHERN MINNESOTA...THOUGH FOG DEVELOPMENT IS AGAIN EXPECTED OVERNIGHT ESPECIALLY WHERE HEAVY RAIN FALLS TODAY. SHOWER/STORMS POSSIBLE AGAIN SUNDAY SOUTHERN EDGE OF THE CWA IN VICINITY OF THE FRONT...MAINLY IN NORTHWEST WISCONSIN...BUT ELSEWHERE CLEARING SKIES WITH A LIGHT NORTHWEST WIND AND TEMPERATURES SEASONABLE TO SLIGHTLY ABOVE NORMAL. APOLOGIES FOR THE ABBREVIATED DISCUSSION DUE TO ONGOING SEVERE WEATHER. .LONG TERM...(SUNDAY NIGHT THROUGH SATURDAY) ISSUED AT 402 PM CDT SAT AUG 8 2015 A TRAILING COLD FRONT ACROSS CENTRAL MN AND NRN WI WILL ALLOW A FEW SHOWERS AND WEAK STORMS TO LINGER ACROSS THE SRN AND SERN PORTIONS OF THE NORTHLAND SUNDAY NIGHT AND MONDAY MORNING. HIGH PRESSURE WILL BEGIN TO BUILD IN FROM THE NW EARLY MONDAY PRIOR TO THE PASSAGE OF AN UPPER S/W OVER WRN ONTARIO...FAR NERN MN AND WRN LAKE SUPERIOR. AS THIS WAVE BRUSHES THE ARROWHEAD MON AFTERNOON THE COOL AIR ALOFT ASSOCIATED WITH THE LOW...850MB TEMPS AROUND 7-8 DEG C...WILL COMBINE WITH WARM SFC TEMPERATURES TO STEEPEN LAPSE RATES AND TRIGGER A FEW CONVECTIVE SHOWERS AND WEAK T-STORMS. THE BEST CHANCE WILL BE THROUGH THE ARROWHEAD DURING THE LATE AFTERNOON...WITH CONDITIONS IMPROVING IN THE EVENING AS THE DAYTIME HEATING IS LOST AND HIGH PRESSURE BEGINS TO BUILD IN FROM THE WEST. HIGH PRESSURE WILL DOMINATE THE REGION THROUGH LATE WEDNESDAY WITH DRY CONDITIONS AND WARMING TEMPERATURES EXPECTED. THE NEXT SYSTEM WILL ARRIVE FROM THE NW ON THURSDAY WITH ANOTHER ROUND OF SHOWERS AND STORMS EXPECTED. TEMPERATURES WILL REMAIN ON THE MILD TO WARM SIDE WITH A SLIGHT WARMING TREND EXPECTED THROUGH THE WEEK. HIGHS WILL BEGIN TO PUSH BACK INTO THE 80S WITH OVERNIGHT LOWS IN THE 50S AND 60S. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SUNDAY AFTERNOON) ISSUED AT 1224 PM CDT SAT AUG 8 2015 VFR CONDITIONS THIS AFTERNOON WITH SCATTERED RAIN SHOWERS AND THUNDERSTORMS DEVELOPING AROUND 20-22Z AND PERSISTING INTO THE EARLY EVENING. MAY LINGER LONGER ACROSS NW WI. WILL LIKELY SEE AREAS OF FOG...LOCALLY DENSE AT TIMES...ACROSS MUCH OF THE REGION LATE TONIGHT AND SUN MORNING. CEILINGS WILL DROP BELOW 1000 FT AND VSBYS WILL FALL TO AROUND 1/2SM OR LESS. && .PRELIMINARY POINT TEMPS/POPS... DLH 61 79 58 75 / 50 20 20 10 INL 56 75 52 75 / 10 0 0 20 BRD 61 80 57 79 / 50 20 20 10 HYR 61 81 56 75 / 30 30 30 10 ASX 62 79 56 74 / 40 30 20 10 && .DLH WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. LS...NONE. && SHORT TERM...JJM LONG TERM...TENTINGER AVIATION...TENTINGER
Hazardous weather outlook, Aug 8, 12:49 PM CDT, 3 hours 17 minutes before
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</html>In the hours before
Special weather statement, Aug 8, 10:11 AM CDT, 5 hours 55 minutes before
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</html>Special weather statement, Aug 8, 10:29 AM CDT, 5 hours 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 1029 AM CDT SAT AUG 8 2015 MNZ018-026-081545- NORTH ITASCA-SOUTH ITASCA- 1029 AM CDT SAT AUG 8 2015 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL ITASCA COUNTY... AT 1029 AM CDT...A STRONG THUNDERSTORM WAS NEAR TACONITE...OR 7 MILES NORTHWEST OF HILL ANNEX MINE STATE PARK...MOVING EAST AT 25 MPH. WIND GUSTS UP TO 35 MPH...DIME SIZE HAIL...HEAVY DOWNPOURS...AND OCCASIONAL CLOUD TO GROUND LIGHTNING CAN BE EXPECTED WITH THIS STORM. THIS STORM WILL BE NEAR... KEEWATIN AND NASHWAUK AROUND 1045 AM CDT. OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE LAWRENCE LAKE AND BUCK LAKE. SEEK SHELTER INSIDE A STURDY BUILDING AND AWAY FROM WINDOWS UNTIL THIS STORM PASSES. IF YOU ARE ON OR NEAR ONE OF THE MANY AREA LAKES...GET OFF OF THE WATER IMMEDIATELY AND SEEK SHELTER ON SHORE INSIDE A STURDY BUILDING. LAT...LON 4734 9347 4749 9349 4757 9307 4735 9307 TIME...MOT...LOC 1529Z 262DEG 23KT 4741 9337 MOORE
Local storm report, Aug 8, 1:55 PM CDT, 2 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
155 PM CDT SAT AUG 08 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0153 PM HEAVY RAIN 6 ENE HACKENSACK 46.96N 94.41W
08/08/2015 M2.07 INCH CASS MN TRAINED SPOTTER
TOTAL FOR TODAY. 0.23 INCHES FELL THIS MORNING.
&&
KLHLocal storm report, Aug 8, 2:05 PM CDT, 2 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
205 PM CDT SAT AUG 08 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0202 PM HAIL 2 WSW LONGVILLE 46.98N 94.25W
08/08/2015 E0.25 INCH CASS MN TRAINED SPOTTER
&&
KLHSpecial weather statement, Aug 8, 2:27 PM CDT, 1 hour 39 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 227 PM CDT SAT AUG 8 2015 MNZ025-035-082000- NORTH CASS-NORTHERN AITKIN- 227 PM CDT SAT AUG 8 2015 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL CASS AND NORTHWESTERN AITKIN COUNTIES... AT 226 PM CDT...A STRONG THUNDERSTORM WAS 8 MILES NORTH OF OUTING... OR 21 MILES SOUTHWEST OF SCHOOLCRAFT STATE PARK...MOVING EAST AT 30 MPH. WIND GUSTS UP TO 35 MPH...DIME SIZE HAIL...TORRENTIAL RAINFALL...AND FREQUENT CLOUD TO GROUND LIGHTNING CAN BE EXPECTED WITH THIS STORM. THIS STORM WILL BE NEAR... SWATARA AROUND 255 PM CDT. HILL CITY AROUND 300 PM CDT. OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE THUNDER LAKE... WASHBURN LAKE...LAURA LAKE...HAYPOINT...WHITE ELK LAKE...BAIN AND LAKE ROOSEVELT. SEEK SHELTER INSIDE A STURDY BUILDING AND AWAY FROM WINDOWS UNTIL THIS STORM PASSES. IF YOU ARE ON OR NEAR ONE OF THE MANY AREA LAKES...GET OFF OF THE WATER IMMEDIATELY AND SEEK SHELTER ON SHORE INSIDE A STURDY BUILDING. LAT...LON 4684 9410 4703 9409 4702 9356 4679 9357 TIME...MOT...LOC 1926Z 273DEG 26KT 4694 9399 MOORE
Local storm report, Aug 8, 3:08 PM CDT, 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
308 PM CDT SAT AUG 08 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0250 PM HAIL 4 N DEER RIVER 47.39N 93.79W
08/08/2015 E0.25 INCH ITASCA MN TRAINED SPOTTER
SMALL BRANCHES DOWN.
&&
JJMThe office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 8:40 PM CDT | Dense Fog Advisory | DLH | Carlton, Cook, Lake, Pine, Saint Louis | 13 hr |
| Aug 7, 9:18 PM CDT | Special Weather Statement | DLH | Koochiching | 87 min |
| Aug 7, 10:12 PM CDT | Special Weather Statement | DLH | Koochiching | 33 min |
| Aug 7, 10:42 PM CDT | Special Weather Statement | DLH | Koochiching | 18 min |
| Aug 7, 11:01 PM CDT | Special Weather Statement | DLH | Koochiching | 14 min |
| Aug 7, 11:20 PM CDT | Special Weather Statement | DLH | Koochiching | 25 min |
| Aug 7, 11:48 PM CDT | Special Weather Statement | DLH | Koochiching | 12 min |
| Aug 8, 12:03 AM CDT | Special Weather Statement | DLH | Koochiching | 27 min |
| Aug 8, 12:28 AM CDT | Special Weather Statement | DLH | Koochiching | 32 min |
| Aug 8, 1:08 AM CDT | Special Weather Statement | DLH | Saint Louis | 37 min |
| Aug 8, 1:12 AM CDT | Special Weather Statement | DLH | Itasca | 33 min |
| Aug 8, 1:45 AM CDT | Special Weather Statement | DLH | Itasca | 30 min |
| Aug 8, 2:00 AM CDT | Special Weather Statement | DLH | Cass | 30 min |
| Aug 8, 2:11 AM CDT | Special Weather Statement | DLH | Itasca | 34 min |
| Aug 8, 2:28 AM CDT | Special Weather Statement | DLH | Cass | 32 min |
| Aug 8, 2:53 AM CDT | Special Weather Statement | DLH | Itasca | 37 min |
| Aug 8, 4:57 AM CDT | Special Weather Statement | DLH | Wadena | 33 min |
| Aug 8, 5:33 AM CDT | Special Weather Statement | DLH | Crow Wing | 27 min |
| Aug 8, 5:57 AM CDT | Special Weather Statement | DLH | Crow Wing | 33 min |
| Aug 8, 6:38 AM CDT | Special Weather Statement | DLH | Crow Wing | 22 min |
| Aug 8, 6:57 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Crow Wing | 18 min |
| Aug 8, 7:20 AM CDT | Special Weather Statement | DLH | Crow Wing | 25 min |
| Aug 8, 7:44 AM CDT | Special Weather Statement | DLH | Crow Wing | 31 min |
| Aug 8, 9:43 AM CDT | Special Weather Statement | DLH | Itasca | 17 min |
| Aug 8, 10:11 AM CDT | Special Weather Statement | DLH | Itasca | 19 min |
| Aug 8, 10:29 AM CDT | Special Weather Statement | DLH | Itasca | 16 min |
| Aug 8, 10:37 AM CDT | Severe Thunderstorm Warning | DLH | Itasca, Saint Louis | 23 min |
| Aug 8, 2:09 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Itasca | 36 min |
| Aug 8, 2:27 PM CDT | Special Weather Statement | DLH | Cass | 33 min |
| Aug 8, 2:51 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing | 24 min |
| Aug 8, 2:56 PM CDT | Severe Thunderstorm Warning | DLH | Itasca | 34 min |
| Aug 8, 3:16 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing | 29 min |
| Aug 8, 3:21 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 24 min |
| Aug 8, 3:34 PM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 26 min |
| Aug 8, 3:46 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin | 29 min |
| Aug 8, 3:50 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 25 min |
| Aug 8, 4:11 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 19 min |
| Aug 8, 4:16 PM CDT | Special Weather Statement | DLH | Aitkin | 29 min |
| Aug 8, 4:24 PM CDT | Tornado Warning | DLH | Saint Louis | 36 min |
| Aug 8, 4:29 PM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 31 min |
| Aug 8, 4:46 PM CDT | Special Weather Statement | DLH | Carlton | 29 min |
| Aug 8, 4:53 PM CDT | Areal Flood Advisory | DLH | Lake, Saint Louis | 3 hr |
| Aug 8, 4:58 PM CDT | Severe Thunderstorm Warning | DLH | Lake | 32 min |
| Aug 8, 5:03 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton | 27 min |
| Aug 8, 5:29 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Pine | 31 min |
| Aug 8, 5:36 PM CDT | Areal Flood Advisory | DLH | Aitkin, Cass, Crow Wing | 5 hr |
| Aug 8, 5:50 PM CDT | Special Weather Statement | DLH | Aitkin | 10 min |
| Aug 8, 5:58 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Pine | 47 min |
| Aug 8, 6:06 PM CDT | Special Weather Statement | DLH | Aitkin | 24 min |
| Aug 8, 6:34 PM CDT | Special Weather Statement | DLH | Aitkin | 26 min |
| Aug 8, 6:48 PM CDT | Special Weather Statement | DLH | Cook | 27 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2015Every severe thunderstorm warning in 2015
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.