Alert archive / Minnesota / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 4, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 12, 2010, 8:14 PM CDT for Blue Earth County, Waseca County, Minnesota. It was in force for 61 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
- Apr 12, 2010, 8:14 PM CDT (01:14 UTC)
- Expired
- Apr 12, 2010, 9:15 PM CDT
- In force
- 61 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Blue Earth County, MN, Waseca County, MN
The radar
The Minneapolis radar (KMPX), 85 km from the middle of the area, began a volume at 01:17 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 |
|---|---|---|---|
| Apr 12, 8:20 PM CDT | HAIL 1.75 | 1 S St Clair, MN | |
| Apr 12, 8:38 PM CDT | HAIL 0.75 | 1 Ne Pemberton, 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 00:00Z, 1.2 hours before the alert went out and 84 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1387 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
898 WUUS53 KMPX 130114 SVRMPX MNC013-161-130215- /O.NEW.KMPX.SV.W.0004.100413T0114Z-100413T0215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 814 PM CDT MON APR 12 2010 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA... NORTHWEST AND WEST CENTRAL WASECA COUNTY IN SOUTH CENTRAL MINNESOTA... * UNTIL 915 PM CDT * AT 809 PM CDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM WITH QUARTER SIZE HAIL. THIS STORM WAS LOCATED 4 MILES SOUTHWEST OF ST CLAIR...OR ABOUT 11 MILES SOUTHEAST OF MANKATO...AND MOVING EAST AT 15 MPH. LOCATIONS IN THE WARNING INCLUDE... ST CLAIR... PEMBERTON... JANESVILLE... ALMA CITY... SMITHS MILL... 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 4419 9361 4399 9352 4397 9389 4414 9398 TIME...MOT...LOC 0112Z 251DEG 14KT 4404 9387 WIND...HAIL MPH 1.00IN $$
1 follow-up statement
822 WWUS53 KMPX 130210 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 910 PM CDT MON APR 12 2010 MNC013-161-130219- /O.EXP.KMPX.SV.W.0004.000000T0000Z-100413T0215Z/ BLUE EARTH MN-WASECA MN- 910 PM CDT MON APR 12 2010 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWEST AND WEST CENTRAL WASECA AND EAST CENTRAL BLUE EARTH COUNTIES WILL EXPIRE AT 915 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. LAT...LON 4419 9361 4399 9352 4397 9389 4414 9398 TIME...MOT...LOC 0209Z 259DEG 13KT 4404 9371 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 3:52 AM CDT | Wind Advisory | MPX | Chippewa, Douglas, Lac qui Parle, Pope, Stevens, Swift and 1 more | 20 hr |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2010Every severe thunderstorm warning in 2010
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.