Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 277, NWS Twin Cities, MN

July 14, 1998Brown County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 14, 1998, 10:54 PM CDT for Brown County, Minnesota. It was in force for 61 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
Jul 14, 1998, 10:54 PM CDT (03:54 UTC)
Expired
Jul 14, 1998, 11:55 PM CDT
In force
61 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Brown County, MN

The radar

The Minneapolis radar (KMPX), 114 km from the middle of the area, began a volume at 03:58 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, 11:20 PM CDTThunderstorm Wind 60Comfrey, MNHouse under construction blown down. Large trees blown down. Estimated windspeed.

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, 3.9 hours before the alert went out and 112 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.

000 
TTAA00 KMSP 150354 RRA
SVRMSP
MNC015-150455-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1054 PM CDT TUE JUL 14 1998

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

* SEVERE THUNDERSTORM WARNING FOR...
  BROWN COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 1155 PM CDT

* AT 1050 PM CDT...DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL AND DAMAGING WINDS NEAR SPRINGFIELD OR...25 MILES
  SOUTH/SOUTHEAST OF REDWOOD FALLS.  THE STORM WAS MOVING SOUTHEAST
  AT 20 MPH.

* SOME LOCATIONS AFFECTED
    SLEEPY EYE
    COMFREY
    NEW ULM
    EVAN

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


TOGSTAD

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, 8:05 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Pope, Stearns, Swift60 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 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.