Alert archive / South Dakota / Tornado Warnings in 1995

Tornado Warning 7, NWS Sioux Falls, SD

July 27, 1995Brookings County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 27, 1995, 5:39 AM CDT for Brookings County, South Dakota. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Jul 27, 1995, 5:39 AM CDT (10:39 UTC)
Expired
Jul 27, 1995, 6:15 AM CDT
In force
36 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Brookings County, SD

The radar

The Sioux Falls radar (KFSD), 87 km from the middle of the area, began a volume at 10:40 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

Aberdeen, SD (KABR), launched 00:00Z, 10.7 hours before the alert went out and 140 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, Aberdeen, SD at 00:00Z on 1995-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2702 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, Aberdeen, SD at 00:00Z on 1995-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 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
2702 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
1287 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
319 m²/s²
Significant tornado parameter
1.6
Supercell composite
22.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 271042
TORFSD
SDC011-271115-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
539 AM CDT THU JUL 27 1995
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  615 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL SOUTH DAKOTA
 
   ...WESTERN BROOKINGS COUNTY
 
SIOUX FALLS DOPPLER RADAR SHOWED A DEVELOPING TORNADO WILL MOVE INTO
WESTERN BROOKINGS COUNTY SOUTHEASHT OF ARLINGTON. THE TORNADO WILL MOVE T
TSOUTH OF VOLGA BY 6 AM CDT.
 
 
 
A TORNADO WATCH IS IN EFFECT FOR PARTS OF SOUTHEAST SOUTH DAKOTA...
NORTHWEST IOWA AND SOUTHWEST MINNESOTA.
 
 
UMLAND

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 27, 3:50 AM CDTSevere Thunderstorm WarningFSDMcCook, Minnehaha23 min
Jul 27, 6:18 AM CDTSevere Thunderstorm WarningFSDBrookings32 min
Jul 27, 6:52 AM CDTSevere Thunderstorm WarningFSDBrookings43 min

Nearby

Tornado Warnings in South Dakota, 1995Every tornado warning in 1995Tornadoes in 1995

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.