Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 35, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 21, 2011, 5:25 PM CDT for Chippewa County, Pope County, Swift County, Minnesota. It was in force for 50 min. 1 report 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, 5:25 PM CDT (22:25 UTC)
- Expired
- May 21, 2011, 6:15 PM CDT
- In force
- 50 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Chippewa County, MN, Pope County, MN, Swift County, MN
The radar
The Minneapolis radar (KMPX), 168 km from the middle of the area, began a volume at 22:27 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, 5:41 PM CDT | HAIL 0.88 | 5 S Benson, MN |
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, 10.4 hours before the alert went out and 165 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.
198 WUUS53 KMPX 212225 SVRMPX MNC023-121-151-212315- /O.NEW.KMPX.SV.W.0035.110521T2225Z-110521T2315Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 525 PM CDT SAT MAY 21 2011 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA... SOUTHWESTERN POPE COUNTY IN WEST CENTRAL MINNESOTA... CENTRAL SWIFT COUNTY IN WEST CENTRAL MINNESOTA... * UNTIL 615 PM CDT * AT 522 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 10 MILES SOUTHWEST OF DE GRAFF...OR ABOUT 13 MILES SOUTH OF BENSON...AND MOVING NORTH AT 30 MPH. LOCATIONS IN THE WARNING INCLUDE... BENSON... DE GRAFF... CLONTARF... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4549 9573 4549 9538 4506 9542 4506 9571 TIME...MOT...LOC 2225Z 178DEG 27KT 4515 9555 WIND...HAIL <50MPH 1.00IN $$
2 follow-up statements
835 WWUS53 KMPX 212257 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 557 PM CDT SAT MAY 21 2011 MNC023-121-151-212315- /O.CON.KMPX.SV.W.0035.000000T0000Z-110521T2315Z/ POPE MN-SWIFT MN-CHIPPEWA MN- 557 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL CHIPPEWA...CENTRAL SWIFT AND SOUTHWESTERN POPE COUNTIES IN WEST CENTRAL MINNESOTA UNTIL 615 PM CDT... AT 554 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM NEAR BENSON...MOVING NORTH AT 30 MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL. LOCATIONS IMPACTED INCLUDE... CLONTARF AND SWIFT FALLS. AT 555 PM...NICKEL SIZE HAIL WAS REPORTED WITH THIS STORM IN BENSON. LAT...LON 4549 9573 4549 9538 4506 9542 4506 9571 TIME...MOT...LOC 2256Z 178DEG 27KT 4537 9563 WIND...HAIL <50MPH 0.88IN $$
057 WWUS53 KMPX 212305 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 605 PM CDT SAT MAY 21 2011 MNC023-212320- /O.CAN.KMPX.SV.W.0035.000000T0000Z-110521T2315Z/ CHIPPEWA MN- 605 PM CDT SAT MAY 21 2011 ...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4549 9573 4549 9538 4516 9541 4516 9571 TIME...MOT...LOC 2305Z 178DEG 27KT 4542 9565 $$ MNC121-151-212315- /O.CON.KMPX.SV.W.0035.000000T0000Z-110521T2315Z/ POPE MN-SWIFT MN- 605 PM CDT SAT MAY 21 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL SWIFT AND SOUTHWESTERN POPE COUNTIES UNTIL 615 PM CDT... AT 603 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR CLONTARF...OR 6 MILES NORTH OF BENSON...MOVING NORTH AT 30 MPH. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF SOUTHWESTERN POPE COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES. && LAT...LON 4549 9573 4549 9538 4516 9541 4516 9571 TIME...MOT...LOC 2305Z 178DEG 27KT 4542 9565 WIND...HAIL <50MPH 1.00IN $$
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, 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, 5:35 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.