Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 187, NWS Twin Cities, MN

June 25, 1998Nicollet County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 25, 1998, 12:12 AM CDT for Nicollet County, Sibley County, Minnesota. It was in force for 33 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
Jun 25, 1998, 12:12 AM CDT (05:12 UTC)
Expired
Jun 25, 1998, 12:45 AM CDT
In force
33 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Nicollet County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 68 km from the middle of the area, began a volume at 05:15 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 25, 12:30 AM CDTThunderstorm Wind 50Nicollet, MNTrees and large branches down. Estimated windspeed.
Jun 25, 12:32 AM CDTThunderstorm Wind 55St Peter, MNCrops damaged. 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 24, 9:00 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.2 hours before the alert went out and 66 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 00:00Z on 1998-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3921 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1998-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.19395878Sfc1 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
3921 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
1033 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
1.2
Supercell composite
5.8

Open this sounding in Storm Lab

The text

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

169 
WUUS1 KMSP 250515 RRA
SVRMSP
MNC013-103-143-250545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1212 AM CDT THU JUN 25 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA
  NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA
  SIBLEY COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 1245 AM CDT

* AT 1210 AM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE STORMS
  FROM BUFFALO LAKE TO GAYLORD TO 25 MILES SOUTHWEST OF MANKATO.
  THE STORMS WERE MOVING EAST-NORTHEAST AT 45 MPH.

* SOME LOCATIONS AFFECTED
    ARLINGTON
    GAYLORD
    MANKATO
    GOOD THUNDER
    NICOLLET
    NORSELAND

DAMAGING WINDS UP TO 70 MPH ARE LIKELY.  GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.

A TORNADO WATCH IS IN EFFECT.  SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES.

JMP

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 9:07 PM CDTSevere Thunderstorm WarningMPXLe Sueur53 min
Jun 24, 10:34 PM CDTSevere Thunderstorm WarningMPXLac qui Parle, Redwood, Yellow Medicine56 min
Jun 24, 11:16 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet, Renville, Watonwan59 min
Jun 24, 11:16 PM CDTSevere Thunderstorm WarningMPXSibley59 min
Jun 24, 11:16 PM CDTSevere Thunderstorm WarningMPXMartin59 min
Jun 24, 11:53 PM CDTSevere Thunderstorm WarningMPXCarver, Le Sueur, Scott52 min
Jun 24, 11:53 PM CDTSevere Thunderstorm WarningMPXMcLeod52 min
Jun 25, 12:12 AM CDTSevere Thunderstorm WarningMPXBlue Earth33 min
Jun 25, 12:36 AM CDTSevere Thunderstorm WarningMPXAnoka, Dakota, Ramsey, Washington59 min
Jun 25, 12:36 AM CDTSevere Thunderstorm WarningMPXHennepin, Wright59 min
Jun 25, 12:45 AM CDTSevere Thunderstorm WarningMPXCarver, Le Sueur, Rice, Scott50 min
Jun 25, 1:25 AM CDTSevere Thunderstorm WarningMPXGoodhue65 min
Jun 25, 1:31 AM CDTSevere Thunderstorm WarningMPXSteele, Waseca59 min
Jun 25, 1:38 AM CDTSevere Thunderstorm WarningMPXChisago, Isanti62 min
Jun 25, 1:38 AM CDTSevere Thunderstorm WarningMPXAnoka, Washington32 min
Jun 25, 1:38 AM CDTSevere Thunderstorm WarningMPXDakota32 min
Jun 25, 1:59 AM CDTSevere Thunderstorm WarningMPXDakota, Scott31 min
Jun 25, 12:53 PM CDTTornado WarningMPXKanabec37 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1998Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.