Alert archive / Minnesota / Tornado Warnings in 1999
Tornado Warning 25, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 9, 1999, 7:07 PM CDT for Rice County, Minnesota. It was in force for 33 min. 3 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, 7:07 PM CDT (00:07 UTC)
- Expired
- Aug 9, 1999, 7:40 PM CDT
- In force
- 33 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Rice County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 9, 7:37 PM CDT | Tornado F0 | Morristown, MN | Multiple vortex tornado crossed open fields. Continuation of tornado from Le Sueur County. |
| Aug 9, 7:40 PM CDT | Tornado F0 | Morristown, MN | Trees down in Camp Omega. Continuation of tornado from Le Sueur County. |
| Aug 9, 7:46 PM CDT | Tornado F0 | Morristown, MN | Few trees felled. Tornado cut swath through bean field. |
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, 0.1 hours before the alert went out and 60 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 100007 RRA TORMSP MNC131-100040- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 707 PM CDT MON AUG 9 1999 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS ISSUED A * TORNADO WARNING FOR... RICE COUNTY IN EAST CENTRAL MINNESOTA * UNTIL 740 PM CDT * AT 706 PM CDT...SEVERE WEATHER SPOTTERS REPORTED A TORNADO OCCASIONALLY TOUCHING DOWN NEAR LAKE GEORGE...OR ABOUT 16 MILES WEST OF FARIBAULT. THE STORM WAS MOVING EAST AT 35 MPH. DAMAGE HAS BEEN REPORTED IN LE SUEUR COUNTY. * SOME LOCATIONS AFFECTED SHIELDSVILLE FARIBAULT CANNON CITY WARSAW MORRISTOWN GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWES<T 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, 7:14 PM CDT | Tornado Warning | MPX | Le Sueur | 31 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.