Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 34, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 21, 2011, 4:39 PM CDT for McLeod County, Meeker County, Wright County, Minnesota. It was in force for 66 min. 2 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 21, 2011, 4:39 PM CDT (21:39 UTC)
- Expired
- May 21, 2011, 5:45 PM CDT
- In force
- 66 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties McLeod County, MN, Meeker County, MN, Wright County, MN
The radar
The Minneapolis radar (KMPX), 55 km from the middle of the area, began a volume at 21:41 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 21, 4:44 PM CDT | HAIL 1.5 | 5 Sse Cokato, MN | |
| May 21, 5:47 PM CDT | HAIL 0.25 | 1 Nw Buffalo, MN | DIME SIZE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.7 hours before the alert went out and 53 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
- 2 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 474 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
131 WUUS53 KMPX 212139 SVRMPX MNC085-093-171-212245- /O.NEW.KMPX.SV.W.0034.110521T2139Z-110521T2245Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 439 PM CDT SAT MAY 21 2011 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN MCLEOD COUNTY IN CENTRAL MINNESOTA... EAST CENTRAL MEEKER COUNTY IN CENTRAL MINNESOTA... WRIGHT COUNTY IN CENTRAL MINNESOTA... * UNTIL 545 PM CDT * AT 436 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR COKATO...OR ABOUT 16 MILES NORTHEAST OF HUTCHINSON...AND MOVING NORTHEAST AT 20 MPH. LOCATIONS IN THE WARNING INCLUDE... BUFFALO... HOWARD LAKE... WAVERLY... ANNANDALE... MAPLE LAKE... HASTY... ENFIELD... MONTICELLO... ALBERTVILLE... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. 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. && LAT...LON 4541 9404 4525 9363 4494 9413 4506 9432 TIME...MOT...LOC 2139Z 222DEG 19KT 4506 9414 WIND...HAIL 60MPH 1.00IN $$ JLT
4 follow-up statements
498 WWUS53 KMPX 212150 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 450 PM CDT SAT MAY 21 2011 MNC085-093-171-212245- /O.CON.KMPX.SV.W.0034.000000T0000Z-110521T2245Z/ WRIGHT MN-MEEKER MN-MCLEOD MN- 450 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN MCLEOD...EAST CENTRAL MEEKER AND WRIGHT COUNTIES UNTIL 545 PM CDT... AT 445 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING 1.5 INCH SIZE HAIL SOUTHEAST OF STOCKHOLM. SEVERAL SEVERE STORMS WERE LOCATED FROM COKATO TO RASSAT AND HOWARD LAKE AND MOVING NORTHEAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... BUFFALO...HOWARD LAKE...WAVERLY...ANNANDALE...MAPLE LAKE... MONTICELLO...ENFIELD...HASTY...ALBERTVILLE...SMITH LAKE...RASSAT AND SILVER CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS! TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES. && LAT...LON 4541 9404 4525 9363 4494 9413 4506 9432 TIME...MOT...LOC 2148Z 217DEG 15KT 4507 9411 WIND...HAIL <50MPH 1.25IN $$ JLT
737 WWUS53 KMPX 212204 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 504 PM CDT SAT MAY 21 2011 MNC085-093-171-212245- /O.CON.KMPX.SV.W.0034.000000T0000Z-110521T2245Z/ WRIGHT MN-MEEKER MN-MCLEOD MN- 504 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN MCLEOD...EAST CENTRAL MEEKER AND WRIGHT COUNTIES UNTIL 545 PM CDT... AT 459 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR HOWARD LAKE...OR 12 MILES SOUTHWEST OF BUFFALO...MOVING NORTHEAST AT 15 MPH. IN ADDITION...SPOTTERS HAVE BEEN OBSERVING ROTATION WITH THIS STORM NEAR HOWARD LAKE. IF CONDITIONS WARRANT...A TORNADO WARNING WILL BE ISSUED FOR A PART OF THIS STORM. LOCATIONS IMPACTED INCLUDE... BUFFALO...WAVERLY...ANNANDALE...MAPLE LAKE...MONTICELLO... ALBERTVILLE...ENFIELD...HASTY...RASSAT AND SILVER CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS! 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 4541 9404 4525 9363 4494 9413 4506 9432 TIME...MOT...LOC 2202Z 237DEG 13KT 4508 9406 WIND...HAIL <50MPH 1.00IN $$ JLT
767 WWUS53 KMPX 212216 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 516 PM CDT SAT MAY 21 2011 MNC093-212230- /O.CAN.KMPX.SV.W.0034.000000T0000Z-110521T2245Z/ MEEKER MN- 516 PM CDT SAT MAY 21 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MEEKER COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES. LAT...LON 4525 9363 4503 9399 4512 9416 4535 9389 TIME...MOT...LOC 2215Z 222DEG 19KT 4512 9401 $$ MNC171-212245- /O.CON.KMPX.SV.W.0034.000000T0000Z-110521T2245Z/ WRIGHT MN- 516 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WRIGHT COUNTY UNTIL 545 PM CDT... AT 513 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR WAVERLY...OR 9 MILES SOUTHWEST OF BUFFALO...MOVING NORTHEAST AT 20 MPH. LOCATIONS IMPACTED INCLUDE... BUFFALO...MAPLE LAKE...MONTICELLO...ALBERTVILLE...RASSAT AND SILVER CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS! 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 4525 9363 4503 9399 4512 9416 4535 9389 TIME...MOT...LOC 2215Z 222DEG 19KT 4512 9401 WIND...HAIL <50MPH 1.00IN $$ JLT
446 WWUS53 KMPX 212232 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 532 PM CDT SAT MAY 21 2011 MNC171-212245- /O.CON.KMPX.SV.W.0034.000000T0000Z-110521T2245Z/ WRIGHT MN- 532 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WRIGHT COUNTY UNTIL 545 PM CDT... AT 527 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR BUFFALO...MOVING NORTHEAST AT 20 MPH. IN ADDITION...SEVERAL STORM SPOTTERS ARE OBSERVING A WALL CLOUD NEAR MONTROSE. THIS WALL CLOUD WAS MOVING TO THE NORTHEAST AT 25 MPH. IF CONDITIONS WARRANT...A TORNADO WARNING WILL BE ISSUED. LOCATIONS IMPACTED INCLUDE... BUFFALO...MONTICELLO...ALBERTVILLE AND SILVER CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS! TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES. && LAT...LON 4525 9363 4503 9399 4512 9416 4535 9389 TIME...MOT...LOC 2231Z 227DEG 18KT 4517 9392 WIND...HAIL <50MPH 1.00IN $$ JLT
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 3:20 PM CDT | Special Weather Statement | MPX | Renville | 40 min |
| May 21, 3:57 PM CDT | Special Weather Statement | MPX | McLeod, Meeker, Wright | 63 min |
| May 21, 4:11 PM CDT | Severe Thunderstorm Warning | MPX | McLeod, Meeker, Renville, Sibley, Wright | 49 min |
| May 21, 5:11 PM CDT | Special Weather Statement | MPX | Chippewa, Swift | 49 min |
| May 21, 5:25 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Pope, Swift | 50 min |
| May 21, 5:35 PM CDT | Severe Thunderstorm Warning | MPX | Carver, McLeod, Wright | 55 min |
| May 21, 6:13 PM CDT | Severe Thunderstorm Warning | MPX | Hennepin, Wright | 62 min |
| May 21, 6:37 PM CDT | Tornado Warning | MPX | Hennepin, Isanti | 23 min |
| May 21, 6:54 PM CDT | Special Weather Statement | MPX | Anoka, Sherburne | 51 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.