Alert archive / Minnesota / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 89, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 25, 2009, 2:58 AM CDT for 6 counties in Minnesota. It was in force for 47 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
- Aug 25, 2009, 2:58 AM CDT (07:58 UTC)
- Expired
- Aug 25, 2009, 3:45 AM CDT
- In force
- 47 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Blue Earth County, MN, Brown County, MN, Martin County, MN, Nicollet County, MN, Sibley County, MN, Watonwan County, MN
The radar
The Minneapolis radar (KMPX), 81 km from the middle of the area, began a volume at 08:00 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 |
|---|---|---|---|
| Aug 25, 3:30 AM CDT | HAIL 0.5 | Mankato, MN | |
| Aug 25, 3:30 AM CDT | HAIL 0.75 | Mankato, 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, 8.0 hours before the alert went out and 80 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
- 1525 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 371 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS53 KMPX 250758
SVRMPX
MNC013-015-091-103-143-165-250845-
/O.NEW.KMPX.SV.W.0089.090825T0758Z-090825T0845Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
258 AM CDT TUE AUG 25 2009
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL SIBLEY COUNTY IN CENTRAL MINNESOTA...
SOUTHEASTERN BROWN COUNTY IN SOUTH CENTRAL MINNESOTA...
NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
WESTERN BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
EASTERN WATONWAN COUNTY IN SOUTH CENTRAL MINNESOTA...
NORTHEASTERN MARTIN COUNTY IN SOUTH CENTRAL MINNESOTA...
* UNTIL 345 AM CDT
* AT 256 AM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 5
MILES SOUTH OF NEW ULM TO 4 MILES SOUTHEAST OF LEWISVILLE...AND
MOVING NORTHEAST AT 45 MPH.
LOCATIONS IN THE WARNING INCLUDE...
NEW ULM...
MANKATO...
ST PETER...
COURTLAND...
NICOLLET...
NORTH MANKATO...
NORSELAND...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 4427 9454 4463 9402 4433 9394 4427 9402
4424 9402 4424 9392 4419 9390 4378 9443
TIME...MOT...LOC 0758Z 222DEG 38KT 4426 9443 4389 9438
$$2 follow-up statements
000
WWUS53 KMPX 250816
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
316 AM CDT TUE AUG 25 2009
MNC091-250825-
/O.CAN.KMPX.SV.W.0089.000000T0000Z-090825T0845Z/
MARTIN MN-
316 AM CDT TUE AUG 25 2009
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MARTIN COUNTY IS
CANCELLED...
RADAR INDICATED THAT THE SEVERE STORM HAD WEAKENED OR MOVED OUT OF
THE WARNED AREA. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.
LAT...LON 4389 9429 4431 9445 4463 9402 4434 9395
4432 9395 4427 9402 4424 9402 4424 9392
4419 9390
TIME...MOT...LOC 0815Z 224DEG 46KT 4433 9418 4403 9415
$$
MNC013-015-103-143-165-250845-
/O.CON.KMPX.SV.W.0089.000000T0000Z-090825T0845Z/
SIBLEY MN-BROWN MN-NICOLLET MN-BLUE EARTH MN-WATONWAN MN-
316 AM CDT TUE AUG 25 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 AM CDT
FOR EXTREME NORTHEASTERN WATONWAN...WESTERN BLUE EARTH...NICOLLET...
SOUTHEASTERN BROWN AND SOUTH CENTRAL SIBLEY COUNTIES...
AT 314 AM CDT...RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE SEVERE STORMS WERE LOCATED ALONG A
LINE EXTENDING FROM 3 MILES NORTH OF NICOLLET TO 7 MILES SOUTHEAST OF
LAKE CRYSTAL...AND MOVING NORTHEAST AT 55 MPH.
LOCATIONS IN THE WARNING INCLUDE...
MANKATO...ST PETER...NORSELAND...NORTH MANKATO...NEW SWEDEN...
SKYLINE...RUSH RIVER AND NEW ROME.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 4389 9429 4431 9445 4463 9402 4434 9395
4432 9395 4427 9402 4424 9402 4424 9392
4419 9390
TIME...MOT...LOC 0815Z 224DEG 46KT 4433 9418 4403 9415
$$000
WWUS53 KMPX 250842
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
342 AM CDT TUE AUG 25 2009
MNC013-015-103-143-165-250852-
/O.EXP.KMPX.SV.W.0089.000000T0000Z-090825T0845Z/
SIBLEY MN-BROWN MN-NICOLLET MN-BLUE EARTH MN-WATONWAN MN-
342 AM CDT TUE AUG 25 2009
...THE SEVERE THUNDERSTORM WARNING FOR EXTREME NORTHEASTERN
WATONWAN...WESTERN BLUE EARTH...NICOLLET...SOUTHEASTERN BROWN AND
SOUTH CENTRAL SIBLEY COUNTIES EXPIRES AT 345 AM CDT...
STRONG TO SEVERE STORMS HAVE JUST MOVED OUT OF THE AREA.
HOWEVER...MORE THUNDERSTORMS WERE DEVELOPING IN THE AREA...REMAIN
ALERT FOR ADDITIONAL WARNINGS.
LAT...LON 4389 9429 4431 9445 4463 9402 4434 9395
4432 9395 4427 9402 4424 9402 4424 9392
4419 9390
TIME...MOT...LOC 0842Z 224DEG 46KT 4458 9384 4428 9381
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 2:42 AM CDT | Special Weather Statement | MPX | Blue Earth, Martin, Watonwan | 63 min |
| Aug 25, 3:32 AM CDT | Special Weather Statement | MPX | Swift | 58 min |
| Aug 25, 3:46 AM CDT | Special Weather Statement | MPX | Dakota, Faribault, Le Sueur, Rice, Steele, Waseca | 59 min |
| Aug 25, 5:44 AM CDT | Areal Flood Advisory | MPX | Dakota, Goodhue | 3 hr |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2009Every severe thunderstorm warning in 2009
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.