Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 266, NWS Twin Cities, MN

July 14, 1998Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 14, 1998, 6:30 PM CDT for Morrison County, Minnesota. It was in force for 60 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
Jul 14, 1998, 6:30 PM CDT (23:30 UTC)
Expired
Jul 14, 1998, 7:30 PM CDT
In force
60 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Morrison County, MN

The radar

The Minneapolis radar (KMPX), 141 km from the middle of the area, began a volume at 23:32 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
Jul 14, 2:00 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 139 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 1998-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2677 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 12:00Z on 1998-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.1939Sfc1 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
2677 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
801 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
-14 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 142330 RRA
SVRMSP
MNC097-150030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
630 PM CDT TUE JUL 14 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN MORRISON COUNTY IN CENTRAL MINNESOTA

* UNTIL 730 PM CDT

* AT 630 PM CDT...DOPPLER RADAR INDICATED A SEVERE STORM NEAR
  HARDING...19 MILES SOUTH OF BRAINERD.  THE STORM WAS MOVING
  SOUTHEAST AT 25 MPH.

* SOME LOCATIONS AFFECTED
    HARDING
    LASTRUP
    HILLMAN
    PIERZ
    MORRILL
    RURAL AREAS OF EASTERN MORRISON COUNTY

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

JMP

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 4:11 PM CDTSevere Thunderstorm WarningMPXTodd64 min
Jul 14, 5:07 PM CDTSevere Thunderstorm WarningMPXDouglas33 min
Jul 14, 5:14 PM CDTSevere Thunderstorm WarningMPXMorrison, Todd61 min
Jul 14, 6:08 PM CDTSevere Thunderstorm WarningMPXDouglas62 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.