Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 407, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 21, 2005, 7:40 PM CDT for Saint Croix County, Wisconsin. It was in force for 65 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
- Sep 21, 2005, 7:40 PM CDT (00:40 UTC)
- Expired
- Sep 21, 2005, 8:45 PM CDT
- In force
- 65 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
County Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 87 km from the middle of the area, began a volume at 00:42 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 21, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.7 hours before the alert went out and 90 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
- 2043 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1714 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 274 m²/s²
- 0-3 km storm-relative helicity
- 406 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 9.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KMPX 220041 SVRMPX WIC109-220145- /O.NEW.KMPX.SV.W.0407.050922T0040Z-050922T0145Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 740 PM CDT WED SEP 21 2005 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN * UNTIL 845 PM CDT * AT 737 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS UP TO 65 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 15 MILES NORTHWEST OF NEW RICHMOND TO 19 MILES SOUTHWEST OF NEW RICHMOND...AND MOVING EAST AT 30 MPH. * LOCATIONS IMPACTED INCLUDE... NEW RICHMOND... HUDSON... ROBERTS... HAMMOND... SOMERSET... STAY INDOORS...AND AWAY FROM WINDOWS. LAT...LON 4520 9273 4488 9274 4488 9216 4520 9217 $$ MKM
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 7:01 PM CDT | Tornado Warning | MPX | Polk | 29 min |
| Sep 21, 7:14 PM CDT | Severe Thunderstorm Warning | MPX | Barron | 61 min |
| Sep 21, 7:28 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 62 min |
| Sep 21, 7:36 PM CDT | Flash Flood Warning | MPX | Barron | 3 hr |
| Sep 21, 7:56 PM CDT | Flash Flood Warning | MPX | Polk | 3 hr |
| Sep 21, 7:59 PM CDT | Flash Flood Warning | MPX | Saint Croix | 3 hr |
| Sep 21, 8:14 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn | 61 min |
| Sep 21, 8:20 PM CDT | Severe Thunderstorm Warning | MPX | Pierce | 55 min |
| Sep 21, 8:28 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 32 min |
| Sep 21, 8:38 PM CDT | Severe Thunderstorm Warning | MPX | Saint Croix | 67 min |
| Sep 21, 9:43 PM CDT | Severe Thunderstorm Warning | MPX | Pierce, Saint Croix | 47 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2005Every severe thunderstorm warning in 2005
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.