Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 5, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 5, 2009, 2:25 PM CDT for 4 counties in Wisconsin. It was in force for 65 min. 4 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 5, 2009, 2:25 PM CDT (19:25 UTC)
- Expired
- May 5, 2009, 3:30 PM CDT
- In force
- 65 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Barron County, WI, Dunn County, WI, Polk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 109 km from the middle of the area, began a volume at 19:25 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 5, 2:34 PM CDT | HAIL 0.88 | Star Prairie, WI | |
| May 5, 2:35 PM CDT | HAIL 0.88 | Star Prairie, WI | |
| May 5, 3:25 PM CDT | HAIL 0.88 | Clayton, WI | |
| May 5, 3:25 PM CDT | HAIL 1 | 1 Sse Clayton, WI |
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, 7.4 hours before the alert went out and 112 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 051925 SVRMPX WIC005-033-095-109-052030- /O.NEW.KMPX.SV.W.0005.090505T1925Z-090505T2030Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 225 PM CDT TUE MAY 5 2009 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN POLK COUNTY IN NORTHWEST WISCONSIN... SOUTHWESTERN BARRON COUNTY IN NORTHWEST WISCONSIN... NORTHERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN... NORTHWESTERN DUNN COUNTY IN WEST CENTRAL WISCONSIN... * UNTIL 330 PM CDT * AT 224 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR NEW RICHMOND...AND MOVING NORTHEAST AT 25 MPH. * LOCATIONS IN THE WARNING INCLUDE... STAR PRAIRIE... CYLON... DEER PARK... FOREST... AMERY... CLEAR LAKE... TURTLE LAKE... 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 4542 9215 4520 9195 4504 9256 4518 9266 TIME...MOT...LOC 1925Z 241DEG 23KT 4514 9254 $$
3 follow-up statements
000 WWUS53 KMPX 051947 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 247 PM CDT TUE MAY 5 2009 WIC005-033-095-109-052030- /O.CON.KMPX.SV.W.0005.000000T0000Z-090505T2030Z/ POLK WI-BARRON WI-ST. CROIX WI-DUNN WI- 247 PM CDT TUE MAY 5 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR NORTHWESTERN DUNN...NORTHEASTERN ST. CROIX...SOUTHWESTERN BARRON AND SOUTHEASTERN POLK COUNTIES... AT ABOUT 235 PM CDT...NICKEL SIZE HAIL WAS REPORTED IN STAR PRAIRIE. AT 244 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING HAIL UP TO QUARTER SIZE. THE SEVERE STORM WAS LOCATED NEAR DEER PARK...OR ABOUT 2 MILES NORTHWEST OF DEER PARK...AND MOVING NORTHEAST AT 25 MPH. THE STORM HAS WEAKENED SLIGHTLY. OTHER LOCATIONS IN THE WARNING INCLUDE...AMERY...FOREST...CLEAR LAKE...JOEL...CLAYTON AND TURTLE LAKE. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4509 9245 4522 9257 4542 9215 4520 9195 TIME...MOT...LOC 1945Z 241DEG 23KT 4521 9240 $$
000 WWUS53 KMPX 052012 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 312 PM CDT TUE MAY 5 2009 WIC005-033-095-109-052030- /O.CON.KMPX.SV.W.0005.000000T0000Z-090505T2030Z/ POLK WI-BARRON WI-ST. CROIX WI-DUNN WI- 312 PM CDT TUE MAY 5 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR NORTHWESTERN DUNN...NORTHEASTERN ST. CROIX...SOUTHWESTERN BARRON AND SOUTHEASTERN POLK COUNTIES... AT 310 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM... CAPABLE OF PRODUCING QUARTER SIZE HAIL. THE SEVERE STORM WAS LOCATED NEAR CLEAR LAKE...AND MOVING NORTHEAST AT 20 MPH. ANOTHER STRING STORM WAS LOCATED BETWEEN STAR PRAIRIE AND CLEAR LAKE. OTHER LOCATIONS IN THE WARNING INCLUDE...CLAYTON...JOEL AND TURTLE LAKE. 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. DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. && LAT...LON 4513 9238 4522 9257 4542 9215 4520 9195 TIME...MOT...LOC 2011Z 233DEG 20KT 4526 9229 $$
000 WWUS53 KMPX 052035 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 335 PM CDT TUE MAY 5 2009 WIC005-033-095-109-052042- /O.EXP.KMPX.SV.W.0005.000000T0000Z-090505T2030Z/ POLK WI-BARRON WI-ST. CROIX WI-DUNN WI- 335 PM CDT TUE MAY 5 2009 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DUNN... NORTHEASTERN ST. CROIX...SOUTHWESTERN BARRON AND SOUTHEASTERN POLK COUNTIES EXPIRED AT 330 PM CDT... AT 330 PM CDT...NICKEL SIZE HAIL WAS REPORTED NEAR CLAYTON. SEVERE STORMS HAVE WEAKENED SIGHTLY...BUT SOME HAIL IS STILL LIKELY. PEOPLE IN BARRON AND RUSK COUNTIES SHOULD REMAIN ALERT FOR POSSIBLE ADDITIONAL WARNINGS. LAT...LON 4513 9238 4522 9257 4542 9215 4520 9195 TIME...MOT...LOC 2012Z 233DEG 20KT 4526 9228 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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 |
| May 5, 5:15 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 30 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.