Alert archive / Iowa / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 21, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 16, 1999, 7:51 AM CDT for Ida County, Woodbury County, Iowa. It was in force for 24 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
- May 16, 1999, 7:51 AM CDT (12:51 UTC)
- Expired
- May 16, 1999, 8:15 AM CDT
- In force
- 24 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Ida County, IA, Woodbury County, IA
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 16, 6:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 0.9 hours before the alert went out and 325 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
- 597 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 161253 RRA SVRFSD IAC093-193-161315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 751 AM CDT SUN MAY 16 1999 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WOODBURY COUNTY IN NORTHWEST IOWA IDA COUNTY IN NORTHWEST IOWA * UNTIL 815 AM CDT * AT 751 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES EAST OF SMITHLAND...OR ABOUT 6 MILES NORTHWEST OF MAPLETON...MOVING NORTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ANTHON AROUND 800 AM CDT BATTLE CREEK AROUND 805 AM CDT CORRECTIONVILLE AROUND 810 AM CDT CUSHING AROUND 815 AM CDT GALVA...HOLSTEIN AROUND 820 AM CDT THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIlONAL WEATHER SERVICE FORECAST OFFICE IN SIOUX FALLS.
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 9:20 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Ida | 25 min |
| May 16, 3:24 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 36 min |
| May 16, 3:49 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 26 min |
| May 16, 4:00 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 30 min |
| May 16, 4:16 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee | 29 min |
| May 16, 4:20 PM CDT | Tornado Warning | FSD | Ida | 30 min |
| May 16, 4:55 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 35 min |
| May 16, 5:05 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Woodbury | 30 min |
| May 16, 5:41 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson, Osceola | 34 min |
| May 16, 5:45 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien | 30 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1999Every severe thunderstorm warning in 1999
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.