Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 121, NWS Twin Cities, MN

May 30, 1998Anoka County, Isanti County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 30, 1998, 9:54 PM CDT for Anoka County, Isanti County, Minnesota. It was in force for 61 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
May 30, 1998, 9:54 PM CDT (02:54 UTC)
Expired
May 30, 1998, 10:55 PM CDT
In force
61 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Anoka County, MN, Isanti County, MN

The watch it was issued in

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

IssuedProductOfficeLasted
May 30, 4:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.9 hours before the alert went out and 68 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 1998-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1397 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 00:00Z on 1998-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 349 square meters per square second.1939587897Sfc1 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
1397 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
1452 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
349 m²/s²
0-3 km storm-relative helicity
357 m²/s²
Significant tornado parameter
1.1
Supercell composite
4.6

Open this sounding in Storm Lab

The text

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

515 
WUUS1 KMSP 310257 RRA
SVRMSP
MNC003-059-310355-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
954 PM CDT SAT MAY 30 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA
  ISANTI COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 1055 PM CDT

* AT 950 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE STORMS
   WITH LARGE HAIL 5 MILES EAST OF PRINCETON MINNESOTA TO 5 MILES
   WEST OF ANOKA MINNESOTA.  THE STORMS WERE MOVING EAST SOUTHEAST
   AT 35 MPH.

* SOME LOCATIONS AFFECTED
    CAMBRIDGE
    EAST BETHEL
    ANOKA
    CENTERVILLE

THIS IS A DANGEROUS STORM.  STAY INDOORS AWAY FROM WINDOWS.

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

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 7:05 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Swift55 min
May 30, 7:18 PM CDTSevere Thunderstorm WarningMPXChippewa57 min
May 30, 7:30 PM CDTSevere Thunderstorm WarningMPXStearns45 min
May 30, 7:34 PM CDTSevere Thunderstorm WarningMPXLac qui Parle56 min
May 30, 7:45 PM CDTSevere Thunderstorm WarningMPXChisago, Isanti45 min
May 30, 7:58 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker62 min
May 30, 8:12 PM CDTSevere Thunderstorm WarningMPXChippewa, Yellow Medicine48 min
May 30, 8:16 PM CDTSevere Thunderstorm WarningMPXStearns44 min
May 30, 8:26 PM CDTSevere Thunderstorm WarningMPXChisago64 min
May 30, 8:39 PM CDTSevere Thunderstorm WarningMPXLac qui Parle, Yellow Medicine51 min
May 30, 8:46 PM CDTSevere Thunderstorm WarningMPXBenton, Morrison44 min
May 30, 8:59 PM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Meeker, Renville, Stearns61 min
May 30, 8:59 PM CDTSevere Thunderstorm WarningMPXRedwood61 min
May 30, 9:26 PM CDTSevere Thunderstorm WarningMPXYellow Medicine34 min
May 30, 9:31 PM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs59 min
May 30, 9:47 PM CDTSevere Thunderstorm WarningMPXMcLeod, Wright58 min
May 30, 9:47 PM CDTSevere Thunderstorm WarningMPXNicollet, Sibley58 min
May 30, 10:23 PM CDTSevere Thunderstorm WarningMPXCarver37 min
May 30, 10:31 PM CDTSevere Thunderstorm WarningMPXHennepin44 min
May 30, 10:34 PM CDTSevere Thunderstorm WarningMPXHennepin, Scott51 min
May 30, 10:39 PM CDTSevere Thunderstorm WarningMPXDakota, Ramsey, Washington46 min
May 30, 10:54 PM CDTSevere Thunderstorm WarningMPXGoodhue46 min
May 30, 11:05 PM CDTSevere Thunderstorm WarningMPXRice, Steele, Waseca40 min
May 30, 11:05 PM CDTSevere Thunderstorm WarningMPXGoodhue40 min
May 30, 11:29 PM CDTSevere Thunderstorm WarningMPXFreeborn31 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; the sounding from the Mesonet's radiosonde archive.