Alert archive / Minnesota / Tornado Warnings in 1999
Tornado Warning 33, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 12, 1999, 8:59 PM CDT for Rice County, Scott County, Minnesota. It was in force for 31 min. 1 report 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
- Aug 12, 1999, 8:59 PM CDT (01:59 UTC)
- Expired
- Aug 12, 1999, 9:30 PM CDT
- In force
- 31 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Rice County, MN, Scott County, MN
The radar
The Minneapolis radar (KMPX), 40 km from the middle of the area, began a volume at 02:00 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 12, 9:15 PM CDT | Tornado F0 | Lonsdale, MN | A few trees down. Continuation of the Le Sueur County tornado. |
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 nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.0 hours before the alert went out and 41 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
- 862 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 681 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMPX 130200 RRA TORMSP MNC131-139-130230- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 859 PM CDT THU AUG 12 1999 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * TORNADO WARNING FOR... SOUTHEAST SCOTT COUNTY IN EAST CENTRAL MINNESOTA NORTHERN RICE COUNTY IN SOUTH CENTRAL MINNESOTA * UNTIL 930 PM CDT * AT 859 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A POSSIBLE TORNADO 5 MILES SOUTHWEST OF NEW MARKET...OR ABOUT 17 MILES SOUTHWEST OF BURNSVILLE...MOVING EAST AT 15 MPH. * SOME LOCATIONS IN THE PATH OF THIS TORNADO INCLUDE... ELKO NEW MARKET VESELI WEBSTER GO TO THE BASEMENT OR A SMALL INTERIOR ROOBM ON THE LOWEST FLOOR! IF YOU ARE IN A MOBILE HOME...ABANDON IT AND GO TO A NEARBY STURDY BUILDING. AS A LAST RESORT...LIE FLAT IN A DITCH AND COVER YOUR HEAD!
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 8:39 PM CDT | Tornado Warning | MPX | Le Sueur | 36 min |
| Aug 12, 9:32 PM CDT | Tornado Warning | MPX | Dakota, Scott | 28 min |
Nearby
Tornado Warnings in Minnesota, 1999Every tornado warning in 1999Tornadoes 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.