Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 21, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 5, 1999, 5:04 PM CDT for Saint Croix County, Wisconsin. It was in force for 56 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 5, 1999, 5:04 PM CDT (22:04 UTC)
- Expired
- Jun 5, 1999, 6:00 PM CDT
- In force
- 56 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 90 km from the middle of the area, began a volume at 22:07 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 |
|---|---|---|---|
| Jun 5, 5:30 PM CDT | Hail 1.75 | Baldwin, WI | |
| Jun 5, 5:30 PM CDT | Thunderstorm Wind 52 | Deer Park, WI | Estimated windspeed. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 5, 2:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.1 hours before the alert went out and 93 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
- 358 J/kg
- Mixed-layer CIN
- -218 J/kg
- Mixed-layer LCL
- 1247 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 052204 RRA SVRMSP WIC109-052300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 504 PM CDT SAT JUN 5 1999 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN * UNTIL 600 PM CDT * AT 503 PM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE HAIL FROM THE HUDSON AREA TO 10 MILES NORTHEAST OF NEW RICHMOND. THE STORMS WERE MOVING NORTHEAST AT 25 MPH. * SOME LOCATIONS AFFECTED BURKHARDT DEER PARK CYLON FOREST GLENWOOD CITY THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS. A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. TDK
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 4:12 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 33 min |
| Jun 5, 4:33 PM CDT | Tornado Warning | MPX | Saint Croix | 32 min |
| Jun 5, 4:50 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 40 min |
| Jun 5, 5:35 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn | 55 min |
| Jun 5, 6:06 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Rusk | 39 min |
| Jun 5, 6:43 PM CDT | Severe Thunderstorm Warning | MPX | Rusk | 32 min |
| Jun 5, 6:58 PM CDT | Tornado Warning | MPX | Rusk | 32 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.