Alert archive / Minnesota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 179, NWS Twin Cities, MN

August 21, 1996Douglas County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 21, 1996, 9:45 PM CDT for Douglas County, Minnesota. It was in force for 30 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 21, 1996, 9:45 PM CDT (02:45 UTC)
Expired
Aug 21, 1996, 10:15 PM CDT
In force
30 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Douglas County, MN

The radar

The Minneapolis radar (KMPX), 190 km from the middle of the area, began a volume at 02:46 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 00:00Z, 2.8 hours before the alert went out and 188 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 1996-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1959 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 1996-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.19395878Sfc1 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
1959 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
1126 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 220246
SVRMSP
MNC041-220315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
945 PM CDT WED AUG 21 1996

* SEVERE THUNDERSTORM WARNING FOR
  EASTERN DOUGLAS COUNTY - WEST CENTRAL MINNESOTA

* UNTIL 1015 PM CDT
 
* SOME LOCATIONS AFFECTED
    ALEXANDRIA
    CARLOS
    MILTONA
    NELSON

* AT 943 PM CDT DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM NEAR
  MILTONA...15 MILES NORTH OF ALEXANDRIA MOVING EAST AT 30 MPH.

THIS IS A DANGEROUS STORM...WITH DAMAGING WINDS. STAY INDOORS AWAY
FROM WINDOWS.

HAMEN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 8:47 PM CDTSevere Thunderstorm WarningMPXDouglas58 min
Aug 21, 9:03 PM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Swift57 min
Aug 21, 9:24 PM CDTSevere Thunderstorm WarningMPXTodd56 min
Aug 21, 9:39 PM CDTSevere Thunderstorm WarningMPXChippewa, Swift51 min
Aug 21, 10:06 PM CDTSevere Thunderstorm WarningMPXMorrison64 min
Aug 21, 10:56 PM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Renville64 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1996Every severe thunderstorm warning in 1996

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.