Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 21, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at May 10, 2011, 8:12 AM CDT for Itasca County, Koochiching County, Minnesota. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 10, 2011, 8:12 AM CDT (13:12 UTC)
- Expired
- May 10, 2011, 8:47 AM CDT
- In force
- 35 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Itasca County, MN, Koochiching County, MN
The radar
The Duluth radar (KDLH), 150 km from the middle of the area, began a volume at 13:13 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
International Fa, MN (KINL), launched 12:00Z, 1.2 hours before the alert went out and 80 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 570 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
763 WUUS53 KDLH 101312 SVRDLH MNC061-071-101400- /O.NEW.KDLH.SV.W.0021.110510T1312Z-110510T1400Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DULUTH MN 812 AM CDT TUE MAY 10 2011 THE NATIONAL WEATHER SERVICE IN DULUTH MN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL ITASCA COUNTY IN NORTH CENTRAL MINNESOTA... SOUTH CENTRAL KOOCHICHING COUNTY IN NORTH CENTRAL MINNESOTA... * UNTIL 900 AM CDT * AT 812 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 5 MILES WEST OF BIGFORK...OR 39 MILES NORTH OF GRAND RAPIDS...AND MOVING EAST AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... BIGFORK...EFFIE...CRAIGVILLE AND COON LAKE. MINNESOTA STATE HIGHWAY 1 BETWEEN EFFIE AND TOGO. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4800 9323 4772 9317 4769 9389 4791 9394 TIME...MOT...LOC 1312Z 259DEG 23KT 4777 9374 WIND...HAIL 60MPH 1.00IN $$ MILLER
2 follow-up statements
157 WWUS53 KDLH 101327 SVSDLH SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 827 AM CDT TUE MAY 10 2011 MNC061-071-101400- /O.CON.KDLH.SV.W.0021.000000T0000Z-110510T1400Z/ KOOCHICHING MN-ITASCA MN- 827 AM CDT TUE MAY 10 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL ITASCA AND SOUTH CENTRAL KOOCHICHING COUNTIES UNTIL 900 AM CDT... AT 827 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR EFFIE...OR 41 MILES NORTH OF GRAND RAPIDS...MOVING EAST-NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... CRAIGVILLE...EFFIE AND COON LAKE. MINNESOTA HIGHWAY 1 BETWEEN EFFIE AND TOGO. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4800 9323 4774 9318 4776 9376 4792 9382 TIME...MOT...LOC 1327Z 254DEG 24KT 4782 9363 WIND...HAIL 60MPH 1.00IN $$ MILLER
453 WWUS53 KDLH 101347 SVSDLH SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 847 AM CDT TUE MAY 10 2011 MNC061-071-101356- /O.CAN.KDLH.SV.W.0021.000000T0000Z-110510T1400Z/ KOOCHICHING MN-ITASCA MN- 847 AM CDT TUE MAY 10 2011 ...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ITASCA AND SOUTH CENTRAL KOOCHICHING COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. HOWEVER...PEA TO DIME SIZE HAIL...GUSTY WINDS UP TO 30 MPH... HEAVY RAIN AND FREQUENT LIGHTNING REMAIN LIKELY WITH THIS STORM THROUGH AT LEAST 9 AM IN THE EFFIE... TOGO AND CRAIGVILLE AREAS. LAT...LON 4800 9323 4774 9318 4776 9376 4792 9382 TIME...MOT...LOC 1346Z 254DEG 24KT 4785 9345 $$ MILLER
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 10:01 PM CDT | Small Craft Advisory | DLH | 24 hr | |
| May 10, 4:50 AM CDT | Special Weather Statement | DLH | Crow Wing | 40 min |
| May 10, 5:16 AM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 59 min |
| May 10, 5:41 AM CDT | Special Weather Statement | DLH | 64 min | |
| May 10, 6:14 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Crow Wing | 46 min |
| May 10, 6:25 AM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching | 50 min |
| May 10, 7:14 AM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching | 61 min |
| May 10, 7:18 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Itasca | 42 min |
| May 10, 8:23 AM CDT | Special Weather Statement | DLH | Koochiching | 22 min |
| May 10, 8:51 AM CDT | Special Weather Statement | DLH | Koochiching | 24 min |
| May 10, 6:37 PM CDT | Special Weather Statement | DLH | Crow Wing | 43 min |
| May 10, 6:48 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 42 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2011Every severe thunderstorm warning in 2011
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.