Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 193, NWS Twin Cities, MN

August 14, 1997Le Sueur County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 14, 1997, 5:19 PM CDT for Le Sueur County, Minnesota. It was in force for 51 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
Aug 14, 1997, 5:19 PM CDT (22:19 UTC)
Expired
Aug 14, 1997, 6:10 PM CDT
In force
51 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Le Sueur County, MN

The radar

The Minneapolis radar (KMPX), 55 km from the middle of the area, began a volume at 22:19 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.3 hours before the alert went out and 54 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 1997-08-14Temperature 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 1997-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.1939587897Sfc1 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
1284 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
128 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 142224 RRB
SVRMSP
MNC079-142310-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED VALID TIME
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
519 PM CDT THU AUG 14 1997


* SEVERE THUNDERSTORM WARNING FOR
  LE SUEUR COUNTY - SOUTH CENTRAL MINNESOTA

* UNTIL 610 PM CDT

* SOME LOCATIONS AFFECTED
    LE CENTER
    HEIDELBERG
    MONTGOMERY
    NEW PRAGUE

* AT 520 PM CDT DOPPLER RADAR INDICATED A SEVERE STORM 30 MILES
  NORTHWEST OF FARIBAULT.  THE STORM WAS MOVING NORTHEAST AT 30 MPH.

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

MCBEATH PETERS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 5:43 PM CDTTornado WarningMPXLe Sueur32 min
Aug 14, 6:15 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Rice45 min
Aug 14, 6:25 PM CDTTornado WarningMPXGoodhue35 min
Aug 14, 6:37 PM CDTTornado WarningMPXDakota, Rice38 min
Aug 14, 6:55 PM CDTTornado WarningMPXGoodhue35 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997Every severe thunderstorm warning in 1997

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.