Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 23, NWS Twin Cities, MN

March 29, 1998Scott County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Mar 29, 1998, 6:08 PM CST for Scott County, Minnesota. It was in force for 52 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
Mar 29, 1998, 6:08 PM CST (00:08 UTC)
Expired
Mar 29, 1998, 7:00 PM CST
In force
52 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Scott County, MN

The radar

The Minneapolis radar (KMPX), 22 km from the middle of the area, began a volume at 00:09 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 watch it was issued in

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

IssuedProductOfficeLasted
Mar 29, 3:15 PM CSTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.1 hours before the alert went out and 23 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 1998-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 625 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 1998-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 499 square meters per square second.1939587897117Sfc1 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
625 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
529 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
499 m²/s²
0-3 km storm-relative helicity
565 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 300011
SVRMSP
MNC139-300100-

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


* SEVERE THUNDERSTORM WARNING FOR
  SCOTT COUNTY - EAST CENTRAL MINNESOTA

* UNTIL 700 PM CST

* SOME LOCATIONS AFFECTED
    NEW MARKET
    ELKO
    ST PATRICK

* AT 609 PM CST DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL AND DAMAGING WINDS NEAR NEW PRAGUE...OR ABOUT 15 MILES NRTH
  OF FARIBAULT.  THE STORM WAS MOVING EAST-NORTHEAST AT 20 MPH.

DAMAGING WINDS AND VERY LARGE HAIL...POSSIBLY UP TO BASEBALL
SIZE...ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM
WINDOWS.

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

MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 29, 6:08 PM CSTTornado WarningMPXLe Sueur, Rice57 min
Mar 29, 6:25 PM CSTTornado WarningMPXDakota50 min
Mar 29, 7:07 PM CSTSevere Thunderstorm WarningMPXGoodhue63 min
Mar 29, 7:45 PM CSTSevere Thunderstorm WarningMPXBlue Earth, Waseca45 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; radar from the NEXRAD Level II archive.