Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 6, NWS Twin Cities, MN

March 29, 1998Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Mar 29, 1998, 3:07 PM CST for Wright 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
Mar 29, 1998, 3:07 PM CST (21:07 UTC)
Expired
Mar 29, 1998, 3:40 PM CST
In force
33 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Wright County, MN

The radar

The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 21:10 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
Mar 29, 3:25 PM CSTHail 0.75Monticello, MN

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, 9.1 hours before the alert went out and 46 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 1998-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1998-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
551 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
251 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 292110 RRA
SVRMSP
MNC171-292140-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
307 PM CST SUN MAR 29 1998


* SEVERE THUNDERSTORM WARNING FOR
  NORTHERN WRIGHT COUNTY - CENTRAL MINNESOTA

* UNTIL 340 PM CST

* SOME LOCATIONS AFFECTED
    MAPLE LAKE
    MONTICELLO
    ALBERTVILLE

* AT AT 307 PM CST DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL NEAR MAPLE LAKE...OR ABOUT 30 MILES SOUTH OF ST CLOUD.  THE
  STORM WAS MOVING NORTHEAST AT 35 MPH.

THIS IS A DANGEROUS STORM...WITH LARGE HAIL.  STAY INDOORS AWAY
FROM WINDOWS.


MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 29, 2:27 PM CSTSevere Thunderstorm WarningMPXNicollet, Sibley48 min
Mar 29, 2:43 PM CSTSevere Thunderstorm WarningMPXMcLeod, Meeker, Wright47 min
Mar 29, 2:47 PM CSTSevere Thunderstorm WarningMPXFaribault, Freeborn48 min
Mar 29, 2:52 PM CSTSevere Thunderstorm WarningMPXCarver48 min
Mar 29, 2:52 PM CSTTornado WarningMPXScott38 min
Mar 29, 3:00 PM CSTTornado WarningMPXFreeborn35 min
Mar 29, 3:12 PM CSTSevere Thunderstorm WarningMPXDakota, Hennepin, Ramsey63 min
Mar 29, 3:12 PM CSTSevere Thunderstorm WarningMPXAnoka63 min
Mar 29, 3:18 PM CSTSevere Thunderstorm WarningMPXAnoka, Sherburne42 min
Mar 29, 3:23 PM CSTSevere Thunderstorm WarningMPXFreeborn, Steele37 min
Mar 29, 3:32 PM CSTSevere Thunderstorm WarningMPXDakota, Washington63 min
Mar 29, 3:32 PM CSTSevere Thunderstorm WarningMPXGoodhue63 min
Mar 29, 3:39 PM CSTSevere Thunderstorm WarningMPXCarver, Sibley36 min
Mar 29, 3:43 PM CSTSevere Thunderstorm WarningMPXChisago, Isanti47 min
Mar 29, 4:21 PM CSTTornado WarningMPXBrown, Watonwan64 min
Mar 29, 4:28 PM CSTSevere Thunderstorm WarningMPXScott47 min
Mar 29, 4:56 PM CSTTornado WarningMPXBlue Earth, Nicollet59 min
Mar 29, 5:23 PM CSTTornado WarningMPXLe Sueur52 min
Mar 29, 5:47 PM CSTTornado WarningMPXBlue Earth, Nicollet48 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.