Alert archive / Minnesota / Tornado Warnings in 1999

Tornado Warning 9, NWS Twin Cities, MN

June 26, 1999Stearns County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 26, 1999, 6:27 PM CDT for Stearns County, Minnesota. It was in force for 33 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
Jun 26, 1999, 6:27 PM CDT (23:27 UTC)
Expired
Jun 26, 1999, 7:00 PM CDT
In force
33 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Stearns County, MN

The radar

The Minneapolis radar (KMPX), 113 km from the middle of the area, began a volume at 23:30 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

TimeReportWhereRemark
Jun 26, 6:30 PM CDTThunderstorm Wind 60Kimball, MNBarn blown down. 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 111 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 1999-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 1999-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 235 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
42 J/kg
Mixed-layer CIN
-391 J/kg
Mixed-layer LCL
1421 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
235 m²/s²
0-3 km storm-relative helicity
229 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMSP 262328 RRA
TORMSP
MNC145-270000-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
627 PM CDT SAT JUN 26 1999

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES/CHANHASSEN HAS
ISSUED A

* TORNADO WARNING FOR...
  EASTERN STEARNS COUNTY IN CENTRAL MINNESOTA

* UNTIL 700 PM CDT

* AT 625 PM CDT...LAW ENFORCEMENT REPORTED A TORNADO 2 MILES WEST OF
  AVON...OR ABOUT 15 MILES WEST OF ST CLOUD.  THE STORM WAS MOVING
  EAST AT 20 MPH.

* SOME LOCATIONS AFFECTED
  COLLEGEVILLE
  ST WENDEL
  AVON

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.

IssuedProductOfficeCountiesLasted
Jun 26, 4:48 PM CDTSevere Thunderstorm WarningMPXKandiyohi42 min
Jun 26, 5:38 PM CDTSevere Thunderstorm WarningMPXMorrison37 min
Jun 26, 6:44 PM CDTTornado WarningMPXNicollet31 min
Jun 26, 6:58 PM CDTSevere Thunderstorm WarningMPXBrown47 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.