Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 33, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 21, 2011, 4:11 PM CDT for 5 counties in Minnesota. It was in force for 49 min. 5 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, 4:11 PM CDT (21:11 UTC)
- Expired
- May 21, 2011, 5:00 PM CDT
- In force
- 49 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, Renville County, MN, Sibley County, MN, Wright County, MN
The radar
The Minneapolis radar (KMPX), 69 km from the middle of the area, began a volume at 21:13 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 21, 4:17 PM CDT | HAIL 1 | Cokato, MN | |
| May 21, 4:24 PM CDT | HAIL 0.75 | 10 Ne Hutchinson, MN | |
| May 21, 4:40 PM CDT | HAIL 0.5 | Stewart, MN | PEA TO MARBLE SIZE HAIL |
| May 21, 4:44 PM CDT | HAIL 1.5 | 5 Sse Cokato, MN | |
| May 21, 5:07 PM CDT | HAIL 0.88 | Hutchinson, MN | NICKEL TO DIME |
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, 9.2 hours before the alert went out and 66 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.
858 WUUS53 KMPX 212111 SVRMPX MNC085-093-129-143-171-212200- /O.NEW.KMPX.SV.W.0033.110521T2111Z-110521T2200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 411 PM CDT SAT MAY 21 2011 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN MCLEOD COUNTY IN CENTRAL MINNESOTA... EASTERN MEEKER COUNTY IN CENTRAL MINNESOTA... NORTHEASTERN RENVILLE COUNTY IN CENTRAL MINNESOTA... EXTREME NORTHWESTERN SIBLEY COUNTY IN CENTRAL MINNESOTA... SOUTHWESTERN WRIGHT COUNTY IN CENTRAL MINNESOTA... * UNTIL 500 PM CDT * AT 409 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 LAKESIDE...OR ABOUT 9 MILES SOUTHWEST OF HUTCHINSON...AND MOVING NORTHEAST AT 35 MPH. LOCATIONS IN THE WARNING INCLUDE... HUTCHINSON... CORVUSO... CEDAR MILLS... SILVER LAKE... DARWIN... DASSEL... COKATO... 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 4523 9445 4502 9400 4468 9449 4479 9469 TIME...MOT...LOC 2111Z 218DEG 28KT 4481 9451 WIND...HAIL 60MPH 1.00IN $$ JLT
4 follow-up statements
035 WWUS53 KMPX 212120 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 420 PM CDT SAT MAY 21 2011 MNC085-093-129-143-171-212200- /O.CON.KMPX.SV.W.0033.000000T0000Z-110521T2200Z/ WRIGHT MN-MEEKER MN-MCLEOD MN-RENVILLE MN-SIBLEY MN- 420 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SIBLEY... NORTHEASTERN RENVILLE...NORTHWESTERN MCLEOD...EASTERN MEEKER AND SOUTHWESTERN WRIGHT COUNTIES UNTIL 500 PM CDT... AT 418 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HUTCHINSON... MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... HUTCHINSON...CEDAR MILLS...BISCAY...GREEN ISLE...SILVER LAKE... DARWIN...DASSEL...COKATO AND STOCKHOLM. LAT...LON 4523 9445 4502 9400 4468 9449 4479 9469 TIME...MOT...LOC 2120Z 218DEG 28KT 4486 9444 WIND...HAIL 60MPH 1.00IN $$ JLT
756 WWUS53 KMPX 212130 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 430 PM CDT SAT MAY 21 2011 MNC085-093-129-143-171-212200- /O.CON.KMPX.SV.W.0033.000000T0000Z-110521T2200Z/ WRIGHT MN-MEEKER MN-MCLEOD MN-RENVILLE MN-SIBLEY MN- 430 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SIBLEY... NORTHEASTERN RENVILLE...NORTHWESTERN MCLEOD...EASTERN MEEKER AND SOUTHWESTERN WRIGHT COUNTIES UNTIL 500 PM CDT... AT 427 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HUTCHINSON... MOVING NORTHEAST AT 30 MPH. ANOTHER SEVERE STORM WAS LOCATED NEAR STOCKHOLM IN FAR SOUTHWEST WRIGHT COUNTY MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... GREEN ISLE...SILVER LAKE...DARWIN...DASSEL...COKATO AND STOCKHOLM. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. IN ADDITION...THUNDERSTORMS CAN PRODUCE LARGE CAPSIZING WAVES...EVEN ON SMALL BODIES OF WATER. MOVE INTO DOCK AND SEEK SAFE SHELTER NOW. DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM! && LAT...LON 4523 9445 4502 9400 4468 9449 4479 9469 TIME...MOT...LOC 2129Z 222DEG 25KT 4489 9438 WIND...HAIL 60MPH 1.00IN $$ JLT
100 WWUS53 KMPX 212142 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 442 PM CDT SAT MAY 21 2011 MNC085-093-129-143-171-212200- /O.CON.KMPX.SV.W.0033.000000T0000Z-110521T2200Z/ WRIGHT MN-MEEKER MN-MCLEOD MN-RENVILLE MN-SIBLEY MN- 442 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SIBLEY... NORTHEASTERN RENVILLE...NORTHWESTERN MCLEOD...EASTERN MEEKER AND SOUTHWESTERN WRIGHT COUNTIES UNTIL 500 PM CDT... AT 436 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED SEVERAL SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED AROUND HUTCHINSON AND SOUTHWEST OF HUTCHINSON...MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... DARWIN...DASSEL...COKATO AND STOCKHOLM. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES. && LAT...LON 4523 9445 4502 9400 4468 9449 4479 9469 TIME...MOT...LOC 2141Z 217DEG 25KT 4495 9430 WIND...HAIL 60MPH 1.00IN $$ JLT
873 WWUS53 KMPX 212200 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 500 PM CDT SAT MAY 21 2011 MNC085-093-129-143-171-212215- /O.EXP.KMPX.SV.W.0033.000000T0000Z-110521T2200Z/ WRIGHT MN-MEEKER MN-MCLEOD MN-RENVILLE MN-SIBLEY MN- 500 PM CDT SAT MAY 21 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SIBLEY...NORTHEASTERN RENVILLE...NORTHWESTERN MCLEOD...EASTERN MEEKER AND SOUTHWESTERN WRIGHT COUNTIES HAS EXPIRED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. 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 4523 9445 4502 9400 4468 9449 4479 9469 TIME...MOT...LOC 2200Z 217DEG 25KT 4505 9419 $$ 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, 4:39 PM CDT | Severe Thunderstorm Warning | MPX | McLeod, Meeker, Wright | 66 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.