Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 25, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 10, 2011, 9:29 PM CDT for Isanti County, Kanabec County, Mille Lacs County, Minnesota. It was in force for 46 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, 9:29 PM CDT (02:29 UTC)
- Expired
- May 10, 2011, 10:15 PM CDT
- In force
- 46 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 2.75 in
- Wind
- 50.0 mph
Counties Isanti County, MN, Kanabec County, MN, Mille Lacs County, MN
The radar
The Minneapolis radar (KMPX), 106 km from the middle of the area, began a volume at 02:32 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 |
|---|---|---|---|
| May 10, 5:53 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.5 hours before the alert went out and 106 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
- 4330 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1463 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 292 m²/s²
- Significant tornado parameter
- 3.0
- Supercell composite
- 33.9
The text
As transmitted, in the capitals the NWS used until 2016.
209
WUUS53 KMPX 110229
SVRMPX
MNC059-065-095-110315-
/O.NEW.KMPX.SV.W.0025.110511T0229Z-110511T0315Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
929 PM CDT TUE MAY 10 2011
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
SOUTHWESTERN KANABEC COUNTY IN EAST CENTRAL MINNESOTA...
SOUTH CENTRAL MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
* UNTIL 1015 PM CDT
* AT 927 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
PRODUCING LARGE DAMAGING HAIL UP TO BASEBALL SIZE. THIS STORM HAS
A HISTORY OF PRODUCING HAIL UP TO THIS SIZE. THIS STORM WAS
LOCATED NEAR DALBO...OR ABOUT 7 MILES EAST OF MILACA...AND
MOVING NORTHEAST AT 20 MPH.
LOCATIONS IN THE WARNING INCLUDE...
MORA...
DALBO...
OGILVIE...
LEWIS LAKE...
COIN...
DAY...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
REPORT ANY SIGNIFICANT WIND OR HAIL DAMAGE TO THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY
MORNING FOR SOUTHEASTERN MINNESOTA.
&&
LAT...LON 4592 9337 4585 9318 4569 9320 4563 9357
4576 9362
TIME...MOT...LOC 0229Z 245DEG 16KT 4573 9351
WIND...HAIL <50MPH 2.75IN
$$2 follow-up statements
787
WWUS53 KMPX 110242
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
942 PM CDT TUE MAY 10 2011
MNC095-110252-
/O.CAN.KMPX.SV.W.0025.000000T0000Z-110511T0315Z/
MILLE LACS MN-
942 PM CDT TUE MAY 10 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MILLE LACS
COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 4565 9346 4584 9350 4592 9337 4585 9318
4569 9320
TIME...MOT...LOC 0242Z 245DEG 16KT 4575 9343
$$
MNC059-065-110315-
/O.CON.KMPX.SV.W.0025.000000T0000Z-110511T0315Z/
KANABEC MN-ISANTI MN-
942 PM CDT TUE MAY 10 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
ISANTI AND SOUTHERN KANABEC COUNTIES UNTIL 1015 PM CDT...
AT 942 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS
LOCATED NEAR DALBO...OR 9 MILES EAST OF MILACA...MOVING NORTHEAST AT
20 MPH.
LOCATIONS IMPACTED INCLUDE...
MORA...OGILVIE...LEWIS LAKE AND BRUNSWICK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
&&
LAT...LON 4565 9346 4584 9350 4592 9337 4585 9318
4569 9320
TIME...MOT...LOC 0242Z 245DEG 16KT 4575 9343
WIND...HAIL <50MPH 1.00IN
$$590
WWUS53 KMPX 110253
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
953 PM CDT TUE MAY 10 2011
MNC059-065-110315-
/O.CON.KMPX.SV.W.0025.000000T0000Z-110511T0315Z/
KANABEC MN-ISANTI MN-
953 PM CDT TUE MAY 10 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EXTREME NORTH
CENTRAL ISANTI AND SOUTH CENTRAL KANABEC COUNTIES UNTIL 1015 PM
CDT...
AT 953 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL. THIS STORM
WAS LOCATED NEAR LEWIS LAKE...OR 8 MILES SOUTH OF MORA...MOVING
NORTHEAST AT 20 MPH.
LOCATIONS IMPACTED INCLUDE...
BRUNSWICK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
&&
LAT...LON 4571 9338 4577 9343 4584 9335 4588 9326
4585 9318 4571 9320
TIME...MOT...LOC 0253Z 245DEG 16KT 4577 9333
WIND...HAIL <50MPH 1.25IN
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:00 PM CDT | Severe Thunderstorm Warning | MPX | Freeborn, Steele | 60 min |
| May 10, 7:06 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Mille Lacs, Sherburne | 39 min |
| May 10, 7:21 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Morrison | 54 min |
| May 10, 7:24 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Dakota, Hennepin, Scott | 66 min |
| May 10, 7:43 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Hennepin, Isanti, Mille Lacs, Sherburne, Wright | 62 min |
| May 10, 7:46 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, Scott | 59 min |
| May 10, 7:47 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Mille Lacs | 58 min |
| May 10, 7:54 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Rice, Scott | 53 min |
| May 10, 7:55 PM CDT | Tornado Warning | MPX | Anoka, Hennepin, Sherburne, Wright | 35 min |
| May 10, 8:10 PM CDT | Tornado Warning | MPX | Hennepin | 35 min |
| May 10, 8:27 PM CDT | Severe Thunderstorm Warning | MPX | Isanti, Kanabec, Mille Lacs | 63 min |
| May 10, 8:44 PM CDT | Tornado Warning | MPX | Anoka, Isanti, Sherburne | 35 min |
| May 10, 8:51 PM CDT | Tornado Warning | MPX | Isanti, Kanabec, Mille Lacs | 39 min |
| May 10, 9:19 PM CDT | Severe Thunderstorm Warning | MPX | Kanabec | 41 min |
| May 10, 9:31 PM CDT | Areal Flood Advisory | MPX | Isanti, Kanabec, Mille Lacs | 3 hr |
| May 10, 10:00 PM CDT | Severe Thunderstorm Warning | MPX | Isanti | 43 min |
| May 10, 10:03 PM CDT | Severe Thunderstorm Warning | MPX | Kanabec | 36 min |
| May 10, 10:19 PM CDT | Severe Thunderstorm Warning | MPX | Chisago | 56 min |
| May 10, 10:43 PM CDT | Severe Thunderstorm Warning | MPX | Chisago | 47 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.