Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 20, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 30, 2007, 12:51 PM CDT for Le Sueur County, Nicollet County, Minnesota. It was in force for 54 min. 3 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 30, 2007, 12:51 PM CDT (17:51 UTC)
- Expired
- Apr 30, 2007, 1:45 PM CDT
- In force
- 54 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
Counties Le Sueur County, MN, Nicollet County, MN
The radar
The Minneapolis radar (KMPX), 59 km from the middle of the area, began a volume at 17:51 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 30, 1:00 PM CDT | HAIL 0.5 | 3 W Norseland, MN | HAIL COVERED GROUND. |
| Apr 30, 1:00 PM CDT | HAIL 0.75 | 3 S Le Sueur, MN | |
| Apr 30, 1:05 PM CDT | HAIL 0.75 | Norseland, 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, 5.9 hours before the alert went out and 58 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
- 2666 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -57 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS53 KMPX 301751
SVRMPX
MNC079-103-301845-
/O.NEW.KMPX.SV.W.0020.070430T1751Z-070430T1845Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1251 PM CDT MON APR 30 2007
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA...
NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
* UNTIL 145 PM CDT
* AT 1247 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING NICKLE SIZE HAIL. THIS STORM WAS LOCATED 13
MILES NORTHWEST OF ST PETER...AND MOVING EAST AT 30 MPH.
* LOCATIONS IMPACTED INCLUDE...
ST PETER...
LE CENTER...
MONTGOMERY...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.
LAT...LON 4446 9431 4432 9430 4430 9354 4448 9355
4445 9393
$$2 follow-up statements
000
WWUS53 KMPX 301805
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
104 PM CDT MON APR 30 2007
MNC079-103-301845-
/O.CON.KMPX.SV.W.0020.000000T0000Z-070430T1845Z/
LE SUEUR MN-NICOLLET MN-
104 PM CDT MON APR 30 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR NICOLLET AND LE SUEUR COUNTIES...
AT 104 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING GOLF BALL SIZE HAIL. THIS STORM
WAS LOCATED 3 MILES SOUTHEAST OF NORSELAND...OR ABOUT 10 MILES
SOUTHWEST OF HENDERSON...AND MOVING EAST AT 30 MPH.
ANOTHER SEVERE THUNDERSTORM WAS LOCATED BETWEEN LE CENTER AN
KILKENNY AND MOVING EAST AT 30 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE ST THOMAS...ST HENRY...
OTTAWA...NORSELAND...ST PETER...MONTGOMERY...LE CENTER...KILKENNY AND
CLEVELAND.
LAT...LON 4445 9424 4432 9423 4430 9354 4448 9355
4445 9393
$$000
WWUS53 KMPX 301827
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
125 PM CDT MON APR 30 2007
MNC079-103-301845-
/O.CON.KMPX.SV.W.0020.000000T0000Z-070430T1845Z/
LE SUEUR MN-NICOLLET MN-
125 PM CDT MON APR 30 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR NICOLLET AND LE SUEUR COUNTIES...
AT 120 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING QUARTER SIZE LARGE HAIL. THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 3 MILES NORTHEAST OF
OTTAWA TO KLOSSNER...AND MOVING EAST AT 30 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE
OTTAWA...NORSELAND...KLOSSNER...ST PETER...MONTGOMERY...LE
CENTER...KILKENNY AND CLEVELAND.
LAT...LON 4443 9454 4430 9437 4430 9354 4448 9355
4445 9393
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 1:13 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue, Rice | 24 min |
| Apr 30, 2:24 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 24 min |
| Apr 30, 4:19 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Waseca | 41 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2007Every severe thunderstorm warning in 2007
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.