Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 25, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 2, 2012, 6:20 PM CDT for 4 counties in Minnesota. It was in force for 55 min. 7 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 2, 2012, 6:20 PM CDT (23:20 UTC)
- Expired
- May 2, 2012, 7:15 PM CDT
- In force
- 55 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Blue Earth County, MN, Le Sueur County, MN, Nicollet County, MN, Waseca County, MN
The radar
The Minneapolis radar (KMPX), 78 km from the middle of the area, began a volume at 23:24 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 2, 6:27 PM CDT | HAIL 1 | 4 Wnw Mankato, MN | |
| May 2, 6:27 PM CDT | HAIL 1.25 | 3 Wnw Mankato, MN | |
| May 2, 6:35 PM CDT | HAIL 1.25 | 3 Wnw Mankato, MN | |
| May 2, 6:36 PM CDT | HAIL 1.25 | 2 Wnw Mankato, MN | |
| May 2, 6:37 PM CDT | HAIL 1 | 2 Nne Mankato, MN | |
| May 2, 6:40 PM CDT | HAIL 2 | 2 N North Mankato, MN | |
| May 2, 6:45 PM CDT | HAIL 2.5 | 2 N North Mankato, 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 2, 5:25 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.3 hours before the alert went out and 77 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
- 4 J/kg
- Mixed-layer CIN
- -280 J/kg
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
852 WUUS53 KMPX 022320 SVRMPX MNC013-079-103-161-030015- /O.NEW.KMPX.SV.W.0025.120502T2320Z-120503T0015Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 620 PM CDT WED MAY 2 2012 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA... SOUTHWESTERN LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA... SOUTHEASTERN NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA... NORTHWESTERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA... * UNTIL 715 PM CDT * AT 619 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES WEST OF NORTH MANKATO...OR ABOUT 8 MILES WEST OF MANKATO...AND MOVING EAST AT 25 MPH. LOCATIONS IN THE WARNING INCLUDE... MANKATO... NORTH MANKATO... EAGLE LAKE... ST CLAIR... PEMBERTON... JANESVILLE... ELYSIAN... 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. && LAT...LON 4428 9363 4399 9372 4412 9419 4424 9420 TIME...MOT...LOC 2321Z 266DEG 21KT 4418 9413 WIND...HAIL 60MPH 1.00IN $$
2 follow-up statements
930 WWUS53 KMPX 022336 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 636 PM CDT WED MAY 2 2012 MNC013-079-103-161-030015- /O.CON.KMPX.SV.W.0025.000000T0000Z-120503T0015Z/ LE SUEUR MN-NICOLLET MN-WASECA MN-BLUE EARTH MN- 636 PM CDT WED MAY 2 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN BLUE EARTH...NORTHWESTERN WASECA...EXTREME SOUTHEASTERN NICOLLET AND SOUTHWESTERN LE SUEUR COUNTIES UNTIL 715 PM CDT... AT 633 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...AND DAMAGING WINDS OF 60 MPH. THIS STORM WAS LOCATED NEAR NORTH MANKATO...OR NEAR MANKATO...MOVING EAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... MANKATO...EAGLE LAKE...ST CLAIR...PEMBERTON...JANESVILLE... ELYSIAN...MADISON LAKE AND GREENLAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. && LAT...LON 4410 9411 4425 9403 4428 9363 4399 9372 TIME...MOT...LOC 2336Z 266DEG 21KT 4419 9401 WIND...HAIL 60MPH 1.25IN $$
995 WWUS53 KMPX 030015 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 715 PM CDT WED MAY 2 2012 MNC013-079-103-161-030030- /O.EXP.KMPX.SV.W.0025.000000T0000Z-120503T0015Z/ LE SUEUR MN-NICOLLET MN-WASECA MN-BLUE EARTH MN- 715 PM CDT WED MAY 2 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BLUE EARTH... NORTHWESTERN WASECA...EXTREME SOUTHEASTERN NICOLLET AND SOUTHWESTERN LE SUEUR COUNTIES HAS EXPIRED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11 PM CDT. LAT...LON 4410 9411 4425 9403 4428 9363 4399 9372 TIME...MOT...LOC 0015Z 266DEG 21KT 4420 9369 $$ JRB
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 7:08 PM CDT | Severe Thunderstorm Warning | MPX | Sherburne, Stearns, Wright | 52 min |
| May 1, 7:23 PM CDT | Special Weather Statement | MPX | Isanti, Kanabec | 52 min |
| May 1, 7:24 PM CDT | Severe Thunderstorm Warning | MPX | Carver, McLeod, Sibley | 51 min |
| May 1, 7:30 PM CDT | Severe Thunderstorm Warning | MPX | Chisago, Isanti, Kanabec | 45 min |
| May 1, 7:55 PM CDT | Special Weather Statement | MPX | Anoka | 50 min |
| May 1, 8:08 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Chisago, Isanti | 37 min |
| May 1, 8:09 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Nicollet, Sibley | 66 min |
| May 1, 8:13 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 25 min |
| May 1, 9:24 PM CDT | Special Weather Statement | MPX | Nicollet, Sibley | 51 min |
| May 1, 10:11 PM CDT | Special Weather Statement | MPX | Blue Earth, Faribault, Le Sueur, Martin, Nicollet | 49 min |
| May 1, 11:12 PM CDT | Special Weather Statement | MPX | Freeborn, Rice, Steele, Waseca | 48 min |
| May 2, 5:22 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Brown, Watonwan | 53 min |
| May 2, 5:50 PM CDT | Tornado Warning | MPX | Blue Earth, Brown, Nicollet, Watonwan | 40 min |
| May 2, 6:45 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue, Rice, Steele | 60 min |
| May 2, 6:45 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 60 min |
| May 2, 6:58 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Rice, Steele, Waseca | 47 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2012Every severe thunderstorm warning in 2012
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.