Alert archive / South Dakota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 113, NWS Rapid City, SD

July 2, 1998Mellette County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 2, 1998, 6:27 PM CDT for Mellette County, South Dakota. It was in force for 33 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 2, 1998, 6:27 PM CDT (23:27 UTC)
Expired
Jul 2, 1998, 7:00 PM CDT
In force
33 min
Issued by
NWS Rapid City, SD
Area
Whole counties

County Mellette County, SD

The radar

The Rapid City radar (KUDX), 177 km from the middle of the area, began a volume at 23:28 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

Rapid City, SD (KUNR), launched 12:00Z, 11.5 hours before the alert went out and 179 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, Rapid City, SD at 12:00Z on 1998-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 280 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, Rapid City, SD at 12:00Z on 1998-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 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
280 J/kg
Mixed-layer CIN
-262 J/kg
Mixed-layer LCL
1050 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
2 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

Everything else NWS Rapid City, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 1, 7:00 PM CDTSevere Thunderstorm WarningUNRMellette60 min
Jul 1, 7:15 PM CDTSevere Thunderstorm WarningUNRHaakon45 min
Jul 1, 8:08 PM CDTTornado WarningUNRMellette, Todd32 min
Jul 1, 8:30 PM CDTSevere Thunderstorm WarningUNRTodd60 min
Jul 1, 9:17 PM CDTTornado WarningUNRTodd33 min
Jul 1, 11:36 PM CDTSevere Thunderstorm WarningUNRFall River44 min
Jul 2, 2:08 AM CDTSevere Thunderstorm WarningUNRHarding47 min
Jul 1, 7:26 PM CDTSevere Thunderstorm WarningUNRCampbell, Crook49 min
Jul 1, 9:28 PM CDTFlash Flood WarningUNRCampbell6 hr
Jul 1, 10:58 PM CDTSevere Thunderstorm WarningUNRCrook47 min
Jul 1, 10:58 PM CDTSevere Thunderstorm WarningUNRCrook52 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 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.