Alert archive / Minnesota / Tornado Warnings in 1998

Tornado Warning 25, NWS Twin Cities, MN

June 18, 1998Morrison County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 18, 1998, 2:38 PM CDT for Morrison County, Minnesota. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 18, 1998, 2:38 PM CDT (19:38 UTC)
Expired
Jun 18, 1998, 3:15 PM CDT
In force
37 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Morrison County, MN

The radar

The Minneapolis radar (KMPX), 141 km from the middle of the area, began a volume at 19:42 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.6 hours before the alert went out and 139 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 1998-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 430 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 1998-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
430 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
666 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
-35 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.

533 
WFUS1 KMSP 181939 RRA
TORMSP
MNC097-182010-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
238 PM CDT THU JUN 18 1998

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

* TORNADO WARNING FOR...
  WESTERN MORRISON COUNTY IN CENTRAL MINNESOTA

* UNTIL 315 PM CDT

* AT 238PM CDT...DOPPLER RADAR DETECTED A POSSIBLE TORNADO 10 MILES
  NORTHWEST OF ST. CLOUD.  THE STORM WAS MOVING MOVING NORTHEAST AT
  40 MPH..

* SOME LOCATIONS AFFECTED
    ROYALTON
    GREGORY
    LITTLE FALLS

IF YOU ARE IN A CAR...GO IN A NEARBY STURDY BUILDING  AS A LAST
RESORT LIE FLAT IN A DITCH AND COVER YOUR HEAD

CME

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 2:32 AM CDTSevere Thunderstorm WarningMPXRedwood48 min
Jun 18, 11:36 AM CDTSevere Thunderstorm WarningMPXFaribault34 min
Jun 18, 1:20 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod30 min
Jun 18, 3:39 PM CDTTornado WarningMPXChippewa, Kandiyohi, Swift31 min
Jun 18, 3:59 PM CDTTornado WarningMPXRedwood, Renville46 min
Jun 18, 4:18 PM CDTTornado WarningMPXKandiyohi47 min
Jun 18, 4:25 PM CDTTornado WarningMPXPope, Stevens50 min
Jun 18, 4:44 PM CDTTornado WarningMPXRenville46 min
Jun 18, 5:16 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker49 min

Nearby

Tornado Warnings in Minnesota, 1998Every tornado warning in 1998Tornadoes in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.