Alert archive / Wyoming / Tornado Warnings in 1990
Tornado Warning 2, NWS Rapid City, SD
NWS Rapid City, SD issued this tornado warning at May 13, 1990, 4:33 PM MDT for Niobrara County, Wyoming. It was in force for 12 min.
The area
The counties it named.
The facts
- Issued
- May 13, 1990, 4:33 PM MDT (22:33 UTC)
- Expired
- May 13, 1990, 4:45 PM MDT
- In force
- 12 min
- Issued by
- NWS Rapid City, SD
- Area
- Whole counties
County Niobrara County, WY
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Rapid City, SD (KRAP), launched 12:00Z, 10.6 hours before the alert went out and 171 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1540 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 3:24 PM MDT | Tornado Warning | UNR | Converse | 36 min |
Nearby
Tornado Warnings in Wyoming, 1990Every tornado warning in 1990Tornadoes in 1990
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.