Alert archive / South Dakota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 103, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 22, 1999, 8:07 PM CDT for Day County, South Dakota. It was in force for 63 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 22, 1999, 8:07 PM CDT (01:07 UTC)
- Expired
- Jul 22, 1999, 9:10 PM CDT
- In force
- 63 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
County Day County, SD
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 22, 8:35 PM CDT | Thunderstorm Wind 54 | Bristol, SD | |
| Jul 22, 8:38 PM CDT | Thunderstorm Wind 52 | Webster, SD |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 22, 5:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 22, 3:19 PM CDT, 4 hours 48 minutes earlier.
Area forecast discussion, Jul 22, 3:19 PM CDT, 4 hours 48 minutes before
AREA FORECAST DISCUSSION FOR CENTRAL/NORTHCENTRAL AND NORTHEAST SOUTH DAKOTA AND WEST CENTRAL MINNESOTA NATIONAL WEATHER SERVICE ABERDEEN SD 315 PM CDT THU JULY 22 1999 TSRAS ALREADY BREAKING THROUGH THE CAP ALONG SFC TROUGH EXTENDING ACROSS C AND NC SD LATE THIS AFTERNOON. SATELLITE DERIVED PRODUCTS SHOWED A VERY UNSTABLE AIRMASS ACROSS MOST OF THE ABR CWA WITH LIS DOWN TO -12 AND CAPES OF 4-6 THOUSAND. HIGH DWPTS IN THE MID TO UPPER 70S AND TEMPS IN THE 90S TO OVER 100 WERE WEAKENING THE CAP. SATELLITE PRODUCTS CINH SHOWED THE CAP WEAKENING THE FASTEST IN C SD WHERE TSRAS ARE PRESENTLY DEVELOPING. ALSO...A GOOD THETA-E RIDGE IS IN PLACE OVER NE SD AND WC MN. THEREFORE...AS TROUGH MOVES THROUGH TONIGHT...THERE WILL BE A CHANCE OF TSRAS OVER ALL OF THE AREA. FRIDAY SHOULD AGAIN BE A HOT DAY WITH LESS HUMIDITY AS DWPTS FALL INTO THE 60S. FOR FRIDAY NIGHT AND SATURDAY...MDLS SHOW UPPER RIDGE HOLDING IN STRONG WITH UPPER DISTURBANCES ROLING OVER IT. DUE TO THE TIMING AND STRENGTH OF THESE WAVES...WILL LEAVE OUT POPS FOR THE CWA FOR FRIDAY NIGHT AND SATURDAY. FOR SUNDAY THROUGH TUESDAY...THE WEATHER PATTERN CHANGES VERY LITTLE...EXCEPT FOR ON MONDAY ACROSS NE SD AND WC MN WHERE THE AVN SHOWS A S/W MOVING OVER THE AREA...SO WILL PUT IN A CHANCE OF TSRAS HERE. DID NOT STRAY MUCH FROM GUIDANCE TEMPS. .ABR...NONE. MOHR
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 7:12 PM CDT | Severe Thunderstorm Warning | ABR | Edmunds | 48 min |
| Jul 22, 7:23 PM CDT | Tornado Warning | ABR | Edmunds | 32 min |
| Jul 22, 7:25 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 35 min |
| Jul 22, 7:30 PM CDT | Severe Thunderstorm Warning | ABR | Spink | 65 min |
| Jul 22, 8:00 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 50 min |
| Jul 22, 8:45 PM CDT | Severe Thunderstorm Warning | ABR | Clark | 35 min |
| Jul 22, 8:48 PM CDT | Severe Thunderstorm Warning | ABR | Codington, Hamlin | 62 min |
| Jul 22, 9:00 PM CDT | Severe Thunderstorm Warning | ABR | Grant, Roberts | 65 min |
| Jul 22, 9:54 PM CDT | Severe Thunderstorm Warning | ABR | Deuel | 61 min |
| Jul 22, 9:52 PM CDT | Severe Thunderstorm Warning | ABR | Big Stone, Traverse | 58 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 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; verification from NCEI's Storm Data.