Alert archive / Minnesota / Tornado Warnings in 1999
Tornado Warning 26, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 9, 1999, 7:14 PM CDT for Le Sueur County, Minnesota. It was in force for 31 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
- Aug 9, 1999, 7:14 PM CDT (00:14 UTC)
- Expired
- Aug 9, 1999, 7:45 PM CDT
- In force
- 31 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Le Sueur County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 9, 7:34 PM CDT | Tornado F0 | Waterville, MN | Multiple vortex tornado crossed open fields and continued into Rice County. |
| Aug 9, 7:38 PM CDT | Tornado F0 | Waterville, MN | Few trees down. Tornado continued into Rice County and Camp Omega. |
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 |
|---|---|---|---|
| Aug 9, 6:30 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.2 hours before the alert went out and 54 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
- 1808 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 733 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 291 m²/s²
- 0-3 km storm-relative helicity
- 301 m²/s²
- Significant tornado parameter
- 2.4
- Supercell composite
- 13.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 100014 RRA TORMSP MNC079-100045- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 714 PM CDT MON AUG 9 1999 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN AND EASTERN LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA * UNTIL 745 PM CDT * AT 712 PM CDT...RADAR INDICATED TORNADOES CONTINUED TO BE POSSIBLE FROM 20 TO 35 MILES NORTHEAST OF MANKATO...OR FROM 4 MILES NORTH OF KILKENNY TO 8 MILES SOUTEAST OF CLEVELAND. INDIVIDUAL STORMS WERE MOVING EAST TO SOUTHEAST AT 35 MPH...BUT ADDITIONAL STORMS WERE ALSO DEVELOPING ALONG THIS LINE. * SOME LOCATIONS AFFECTED WATERVILLE ELYSIAN FKILKENNY GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR! TDK &
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:03 PM CDT | Tornado Warning | MPX | Goodhue | 42 min |
| Aug 9, 7:07 PM CDT | Tornado Warning | MPX | Rice | 33 min |
| Aug 9, 7:37 PM CDT | Tornado Warning | MPX | Rice, Steele | 38 min |
| Aug 9, 7:42 PM CDT | Tornado Warning | MPX | Goodhue | 33 min |
| Aug 9, 8:14 PM CDT | Tornado Warning | MPX | Steele | 31 min |
| Aug 9, 8:14 PM CDT | Tornado Warning | MPX | Goodhue | 31 min |
| Aug 9, 8:18 PM CDT | Severe Thunderstorm Warning | MPX | Faribault, Freeborn | 57 min |
| Aug 9, 8:36 PM CDT | Tornado Warning | MPX | Freeborn | 39 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.