Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 270, NWS Twin Cities, MN

July 14, 19984 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 14, 1998, 8:05 PM CDT for 4 counties in Minnesota. It was in force for 60 min. 5 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
Jul 14, 1998, 8:05 PM CDT (01:05 UTC)
Expired
Jul 14, 1998, 9:05 PM CDT
In force
60 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Kandiyohi County, MN, Pope County, MN, Stearns County, MN, Swift County, MN

The radar

The Minneapolis radar (KMPX), 141 km from the middle of the area, began a volume at 01:05 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
Jul 14, 8:10 PM CDTThunderstorm Wind 50Glenwood, MNTrees blown down. Estimated windspeed.
Jul 14, 8:20 PM CDTThunderstorm Wind 50Benson, MNTrees blown down. Estimated windspeed.
Jul 14, 8:35 PM CDTThunderstorm Wind 50Willmar, MNTrees blown down. Estimated windspeed.
Jul 14, 8:40 PM CDTThunderstorm Wind 50Raymond, MNTree blown down. Estimated windspeed.
Jul 14, 9:14 PM CDTTornado F0Blomkest, 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 watch it was issued in

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

IssuedProductOfficeLasted
Jul 14, 8:00 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.1 hours before the alert went out and 138 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 1998-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2121 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 1998-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
2121 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1376 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

393 
WUUS1 KMSP 150109
SVRMSP
MNC067-121-145-151-150205-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED TIME IN TEXT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
805 PM CDT TUE JUL 14 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN KANDIYOHI COUNTY IN CENTRAL MINNESOTA
  POPE COUNTY IN WEST CENTRAL MINNESOTA
  WESTERN STEARNS COUNTY IN CENTRAL MINNESOTA
  SWIFT COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 905 PM CDT

* AT 800 PM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL AND DAMAGING WINDS FROM WESTPORT TO ORTONVILLE OR 30 MILES
  SOUTHWEST OF ALEXANDRIA.  THE STORMS WERE MOVING SOUTHEAST AT 30
  MPH..

* SOME LOCATIONS AFFECTED
    BENSON
    GLENWOOD
    NEW LONDON
    MELROSE
    SWIFT FALLS
    BELGRADE

DAMAGING WINDS AND LARGE HAIL ARE LIKELY.  GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.


WET

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 7:05 PM CDTSevere Thunderstorm WarningMPXMorrison, Stearns, Todd60 min
Jul 14, 7:09 PM CDTSevere Thunderstorm WarningMPXDouglas31 min
Jul 14, 7:39 PM CDTSevere Thunderstorm WarningMPXStevens61 min
Jul 14, 8:29 PM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle61 min
Jul 14, 8:47 PM CDTSevere Thunderstorm WarningMPXKandiyohi48 min
Jul 14, 9:26 PM CDTTornado WarningMPXKandiyohi, Renville34 min
Jul 14, 9:53 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin62 min
Jul 14, 10:01 PM CDTSevere Thunderstorm WarningMPXRedwood, Renville, Yellow Medicine64 min
Jul 14, 10:20 PM CDTSevere Thunderstorm WarningMPXCarver, Dakota, Scott60 min
Jul 14, 10:20 PM CDTSevere Thunderstorm WarningMPXRamsey, Washington60 min
Jul 14, 10:54 PM CDTSevere Thunderstorm WarningMPXBrown61 min
Jul 15, 12:43 AM CDTSevere Thunderstorm WarningMPXFreeborn47 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.