Alert archive / Minnesota / Tornado Warnings in 2011
Tornado Warning 8, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at May 10, 2011, 7:55 PM CDT for 4 counties in Minnesota. It was in force for 35 min. 9 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, 7:55 PM CDT (00:55 UTC)
- Expired
- May 10, 2011, 8:30 PM CDT
- In force
- 35 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Anoka County, MN, Hennepin County, MN, Sherburne County, MN, Wright County, MN
The radar
The Minneapolis radar (KMPX), 46 km from the middle of the area, began a volume at 00:56 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, 7:58 PM CDT | HAIL 1 | St Michael, MN | |
| May 10, 7:58 PM CDT | TORNADO | 1 W St Michael, MN | TIME ESTIMATED. ROOF OF A HOME DAMAGED ON 42ND ST NE. |
| May 10, 7:59 PM CDT | TORNADO | 1 E St Michael, MN | DEBRIS VISIBLE CR 118 AND CR 35 |
| May 10, 8:10 PM CDT | HAIL 1 | 2 W Elk River, MN | |
| May 10, 8:13 PM CDT | HAIL 0.75 | Otsego, MN | |
| May 10, 8:15 PM CDT | HAIL 2 | Albertville, MN | |
| May 10, 8:19 PM CDT | HAIL 2.75 | Albertville, MN | |
| May 10, 8:24 PM CDT | HAIL 1.75 | Elk River, MN | |
| May 10, 8:25 PM CDT | HAIL 1 | Elk River, 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, 0.9 hours before the alert went out and 46 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.
265 WFUS53 KMPX 110055 TORMPX MNC003-053-141-171-110130- /O.NEW.KMPX.TO.W.0008.110511T0055Z-110511T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 755 PM CDT TUE MAY 10 2011 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN SHERBURNE COUNTY IN CENTRAL MINNESOTA... EAST CENTRAL WRIGHT COUNTY IN CENTRAL MINNESOTA... WEST CENTRAL ANOKA COUNTY IN EAST CENTRAL MINNESOTA... NORTH CENTRAL HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA... * UNTIL 830 PM CDT * AT 751 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS 2 MILES NORTHWEST OF HANOVER...AND MOVING NORTHEAST AT 25 MPH. * LOCATIONS IN THE WARNING INCLUDE... ST MICHAEL... ALBERTVILLE... OTSEGO... RAMSEY... ELK RIVER... RAMSEY... 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. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY MORNING FOR SOUTHEASTERN MINNESOTA. && LAT...LON 4535 9362 4530 9335 4514 9369 4518 9378 TIME...MOT...LOC 0055Z 213DEG 23KT 4520 9368 $$
4 follow-up statements
344 WWUS53 KMPX 110100 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 800 PM CDT TUE MAY 10 2011 MNC003-053-141-171-110130- /O.CON.KMPX.TO.W.0008.000000T0000Z-110511T0130Z/ SHERBURNE MN-WRIGHT MN-ANOKA MN-HENNEPIN MN- 800 PM CDT TUE MAY 10 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL HENNEPIN... WEST CENTRAL ANOKA...EAST CENTRAL WRIGHT AND SOUTHEASTERN SHERBURNE COUNTIES UNTIL 830 PM CDT... AT 756 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO ONE MILE SOUTH OF ST MICHAEL. RADAR ALSO SHOWED THIS TORNADO NEAR ST MICHAEL...OR 10 MILES EAST OF BUFFALO...MOVING NORTHEAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... ALBERTVILLE...OTSEGO...RAMSEY...ELK RIVER...RAMSEY...ROGERS...AND DAYTON...AND INTERSTATE 94. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES. && LAT...LON 4535 9362 4530 9335 4514 9369 4518 9378 TIME...MOT...LOC 0059Z 213DEG 23KT 4522 9366 $$
532 WWUS53 KMPX 110106 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 806 PM CDT TUE MAY 10 2011 MNC003-053-141-171-110130- /O.CON.KMPX.TO.W.0008.000000T0000Z-110511T0130Z/ SHERBURNE MN-WRIGHT MN-ANOKA MN-HENNEPIN MN- 806 PM CDT TUE MAY 10 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL HENNEPIN... WEST CENTRAL ANOKA...EAST CENTRAL WRIGHT AND SOUTHEASTERN SHERBURNE COUNTIES UNTIL 830 PM CDT... AT 805 PM CDT...RADAR CONTINUED TO INDICATE A POTENTIAL TORNADIC STORM NEAR ST MICHAEL...OR 11 MILES EAST OF BUFFALO...MOVING NORTHEAST AT 15 MPH. MULTIPLE TRAINED SPOTTERS HAVE REPORTED FUNNELS AND TORNADO TOUCHDOWNS WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... OTSEGO...ELK RIVER...RAMSEY...ROGERS...DAYTON...AND INTERSTATE 94. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 4516 9365 4520 9374 4535 9362 4530 9335 TIME...MOT...LOC 0105Z 228DEG 14KT 4523 9364 $$
350 WWUS53 KMPX 110112 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 812 PM CDT TUE MAY 10 2011 MNC003-053-141-171-110130- /O.CON.KMPX.TO.W.0008.000000T0000Z-110511T0130Z/ SHERBURNE MN-WRIGHT MN-ANOKA MN-HENNEPIN MN- 812 PM CDT TUE MAY 10 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL HENNEPIN... WEST CENTRAL ANOKA...EAST CENTRAL WRIGHT AND SOUTHEASTERN SHERBURNE COUNTIES UNTIL 830 PM CDT... AT 811 PM CDT...RADAR CONTINUED TO INDICATE A STORM CAPABLE OF PRODUCING A TORNADO NEAR ALBERTVILLE. TRAINED WEATHER SPOTTERS HAVE RECENTLY REPORTED FUNNEL CLOUDS WITH THIS STORM. THIS STORM HAS A HISTORY OF PRODUCING A TORNADO. THIS TORNADIC STORM WAS LOCATED NEAR ALBERTVILLE...OR 12 MILES EAST OF BUFFALO...MOVING NORTHEAST AT 15 MPH. IN ADDITION TO A TORNADO...THIS STORM IS LIKELY TO PRODUCE TENNIS BALL SIZE HAIL. LOCATIONS IMPACTED INCLUDE... OTSEGO...ELK RIVER...ALBERTVILLE...ROGERS...DAYTON...RAMSEY...AND INTERSTATE 94. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES. && LAT...LON 4518 9362 4522 9372 4535 9362 4530 9335 TIME...MOT...LOC 0111Z 225DEG 13KT 4524 9364 $$
636
WWUS53 KMPX 110122
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
822 PM CDT TUE MAY 10 2011
MNC053-110128-
/O.CAN.KMPX.TO.W.0008.000000T0000Z-110511T0130Z/
HENNEPIN MN-
822 PM CDT TUE MAY 10 2011
...THE TORNADO WARNING FOR NORTH CENTRAL HENNEPIN COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. HOWEVER...A TORNADO WARNING WAS IN EFFECT FOR SOUTHEASTERN
HENNEPIN COUNTY.
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 4531 9341 4531 9340 4521 9362 4523 9371
4535 9362
TIME...MOT...LOC 0118Z 225DEG 13KT 4526 9363
$$
MNC003-141-171-110130-
/O.CON.KMPX.TO.W.0008.000000T0000Z-110511T0130Z/
SHERBURNE MN-WRIGHT MN-ANOKA MN-
822 PM CDT TUE MAY 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL ANOKA...EAST
CENTRAL WRIGHT AND SOUTHEASTERN SHERBURNE COUNTIES UNTIL 830 PM
CDT...
AT 820 PM CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. TRAINED STORM
SPOTTERS ALSO CONTINUED TO REPORT FUNNEL CLOUDS WITH THIS STORM.
THIS STORM HAS A HISTORY OF PRODUCING A TORNADO NEAR ST. MICHAEL.
THIS DANGEROUS STORM WAS LOCATED NEAR ALBERTVILLE...OR 12 MILES
NORTHEAST OF BUFFALO...MOVING NORTHEAST AT 15 MPH.
IN ADDITION TO A TORNADO...THIS STORM IS LIKELY TO PRODUCE TENNIS
BALL SIZE HAIL.
LOCATIONS IMPACTED INCLUDE...
OTSEGO...ALBERTVILLE...ELK RIVER...ROGERS...DAYTON...AND
INTERSTATE 94.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.
&&
LAT...LON 4531 9341 4531 9340 4521 9362 4523 9371
4535 9362
TIME...MOT...LOC 0118Z 225DEG 13KT 4526 9363
$$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, 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, 9:29 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.