Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 8, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 5, 2009, 5:15 PM CDT for Polk County, Wisconsin. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 5, 2009, 5:15 PM CDT (22:15 UTC)
- Expired
- May 5, 2009, 5:45 PM CDT
- In force
- 30 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
County Polk County, WI
The radar
The Duluth radar (KDLH), 130 km from the middle of the area, began a volume at 22:17 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.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.3 hours before the alert went out and 140 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
- 3 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 1042 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 61 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 052215
SVRMPX
WIC095-052245-
/O.NEW.KMPX.SV.W.0008.090505T2215Z-090505T2245Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
515 PM CDT TUE MAY 5 2009
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN POLK COUNTY IN NORTHWEST WISCONSIN...
* UNTIL 545 PM CDT
* AT 512 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 3 MILES SOUTH
OF CLAM FALLS...OR ABOUT 15 MILES NORTHEAST OF BALSAM LAKE...AND
MOVING NORTHEAST AT 25 MPH.
* LOCATIONS IN THE WARNING INCLUDE...
CLAM FALLS...
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 4572 9215 4564 9215 4558 9217 4553 9236
4569 9247 4574 9234 4573 9216
TIME...MOT...LOC 2215Z 244DEG 22KT 4565 9229
$$1 follow-up statement
000
WWUS53 KMPX 052238
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
538 PM CDT TUE MAY 5 2009
WIC095-052248-
/O.EXP.KMPX.SV.W.0008.000000T0000Z-090505T2245Z/
POLK WI-
538 PM CDT TUE MAY 5 2009
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN POLK COUNTY
EXPIRES AT 545 PM CDT...
LAT...LON 4572 9215 4564 9215 4558 9217 4553 9236
4569 9247 4574 9234 4573 9216
TIME...MOT...LOC 2238Z 244DEG 22KT 4571 9211
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 2:25 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn, Polk, Saint Croix | 65 min |
| May 5, 3:51 PM CDT | Severe Thunderstorm Warning | MPX | Barron | 54 min |
| May 5, 4:44 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Rusk | 61 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.