Alert archive / Minnesota / Tornado Warnings in 2011
Tornado Warning 11, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at May 10, 2011, 8:51 PM CDT for Isanti County, Kanabec County, Mille Lacs County, Minnesota. It was in force for 39 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 10, 2011, 8:51 PM CDT (01:51 UTC)
- Expired
- May 10, 2011, 9:30 PM CDT
- In force
- 39 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Isanti County, MN, Kanabec County, MN, Mille Lacs County, MN
The radar
The Minneapolis radar (KMPX), 100 km from the middle of the area, began a volume at 01:51 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 10, 8:58 PM CDT | HAIL 0.88 | Milaca, MN | |
| May 10, 9:15 PM CDT | HAIL 2 | 2 E Pease, MN | |
| May 10, 9:18 PM CDT | HAIL 0.88 | 2 E Bock, MN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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, 1.9 hours before the alert went out and 100 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.
843 WFUS53 KMPX 110151 TORMPX MNC059-065-095-110230- /O.NEW.KMPX.TO.W.0011.110511T0151Z-110511T0230Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 851 PM CDT TUE MAY 10 2011 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA... SOUTHWESTERN KANABEC COUNTY IN EAST CENTRAL MINNESOTA... NORTHWESTERN ISANTI COUNTY IN EAST CENTRAL MINNESOTA... * UNTIL 930 PM CDT * AT 850 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A TORNADO. THIS STORM IS ALSO PRODUCING A FUNNEL CLOUD BASED ON RECENT TRAIN STORM SPOTTER REPORTS. THE MOST DANGEROUS PART OF THE STORM WAS NEAR PEASE...AND MOVING NORTHEAST AT 20 MPH. THIS STORM IS ALSO LIKELY TO PRODUCE TENNIS BALL SIZE HAIL. * LOCATIONS IN THE WARNING INCLUDE... DALBO... LEWIS LAKE... OGILVIE... BOCK... PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY MORNING FOR SOUTHEASTERN MINNESOTA. && LAT...LON 4589 9335 4561 9335 4559 9372 4575 9372 TIME...MOT...LOC 0150Z 232DEG 19KT 4572 9362 $$
3 follow-up statements
188
WWUS53 KMPX 110209
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
909 PM CDT TUE MAY 10 2011
MNC059-065-095-110230-
/O.CON.KMPX.TO.W.0011.000000T0000Z-110511T0230Z/
MILLE LACS MN-KANABEC MN-ISANTI MN-
909 PM CDT TUE MAY 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN ISANTI...
SOUTHWESTERN KANABEC AND SOUTHERN MILLE LACS COUNTIES UNTIL 930 PM
CDT...
AT 908 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM HAS A
HISTORY OF PRODUCING FUNNEL CLOUDS. IN ADDITION...THIS STORM IS
CAPABLE OF PRODUCING TENNIS BALL SIZE HAIL. HAIL UP TO TWO INCHES IN
DIAMETER WAS REPORTED WITH THIS STORM NEAR FORESTON. THIS DANGEROUS
STORM WAS LOCATED NEAR PEASE...OR NEAR MILACA...MOVING NORTHEAST AT
15 MPH.
LOCATIONS IMPACTED INCLUDE...
MILACA...DALBO...LEWIS LAKE...OGILVIE AND BOCK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORNADOES ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.
&&
LAT...LON 4585 9335 4561 9335 4560 9357 4563 9372
4575 9372
TIME...MOT...LOC 0208Z 236DEG 12KT 4571 9361
$$194
WWUS53 KMPX 110214
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
914 PM CDT TUE MAY 10 2011
MNC059-065-095-110230-
/O.CON.KMPX.TO.W.0011.000000T0000Z-110511T0230Z/
MILLE LACS MN-KANABEC MN-ISANTI MN-
914 PM CDT TUE MAY 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN ISANTI...
SOUTHWESTERN KANABEC AND SOUTH CENTRAL MILLE LACS COUNTIES UNTIL 930
PM CDT...
AT 914 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
WAS LOCATED 2 MILES SOUTHEAST OF PEASE...OR 7 MILES SOUTHEAST OF
MILACA...MOVING EAST AT 30 MPH.
LOCATIONS IMPACTED INCLUDE...
DALBO...LEWIS LAKE...OGILVIE AND BOCK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORNADOES ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.
&&
LAT...LON 4562 9367 4576 9369 4585 9335 4561 9335
4560 9357
TIME...MOT...LOC 0214Z 256DEG 26KT 4568 9355
$$813
WWUS53 KMPX 110223
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
923 PM CDT TUE MAY 10 2011
MNC059-065-095-110230-
/O.CON.KMPX.TO.W.0011.000000T0000Z-110511T0230Z/
MILLE LACS MN-KANABEC MN-ISANTI MN-
923 PM CDT TUE MAY 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN ISANTI...
SOUTHWESTERN KANABEC AND SOUTH CENTRAL MILLE LACS COUNTIES UNTIL 930
PM CDT...
AT 920 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM HAS A
HISTORY OF PRODUCING A FUNNEL CLOUD. IN ADDITION...THIS STORM HAS
PRODUCED SIGNIFICANTLY LARGE HAIL...UP TO AT LEAST TWO INCHES IN
DIAMETER. THIS STORM IS NOW CAPABLE OF PRODUCING HAIL UP TO...AND
POSSIBLY LARGER THAN...BASEBALL SIZE. THIS DANGEROUS STORM WAS
LOCATED NEAR PEASE...OR 6 MILES SOUTHEAST OF MILACA...MOVING EAST AT
15 MPH.
LOCATIONS IMPACTED INCLUDE...
DALBO...LEWIS LAKE...OGILVIE AND BOCK.
IT IS LIKELY THE WARNING WILL BE EXTENDED IN TIME.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORNADOES ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.
&&
LAT...LON 4563 9335 4561 9356 4565 9363 4577 9365
4585 9335
TIME...MOT...LOC 0221Z 250DEG 13KT 4571 9354
$$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, 9:19 PM CDT | Severe Thunderstorm Warning | MPX | Kanabec | 41 min |
| May 10, 9:29 PM CDT | Severe Thunderstorm Warning | MPX | Isanti, Kanabec, Mille Lacs | 46 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
Tornado Warnings in Minnesota, 2011Every tornado warning in 2011Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.