Alert archive / South Dakota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 40, NWS Aberdeen, SD

June 5, 1999Hamlin County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 5, 1999, 9:58 PM CDT for Hamlin County, South Dakota. It was in force for 47 min. 1 report 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: Jun 5, 1999, 9:58 PM CDT (02:58 UTC)
Expired: Jun 5, 1999, 10:45 PM CDT
In force: 47 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Hamlin County, SD

What was reported inside it

Time	Report	Where	Remark
Jun 5, 10:14 PM CDT	Hail 1.75	Hazel, 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
Jun 5, 4:15 PM CDT	Tornado Watch	SPC	7 hr
Jun 5, 9:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.0 hours before the alert went out and 99 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 724 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1560 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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.

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 Jun 5, 9:15 PM CDT, 43 minutes earlier.

Area forecast discussion, Jun 5, 9:15 PM CDT, 43 minutes before

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In the hours before

Special weather statement, Jun 5, 4:40 PM CDT, 5 hours 18 minutes before

SDZ019>023-045-048-051-060400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
439 PM CDT (339 PM MDT) SAT JUN 5 1999

...TORNADO WATCH IS IN EFFECT UNTIL 11PM CDT/ 10PM MDT...

A TORNADO WATCH IS IN EFFECT FOR PORTIONS OF CENTRAL AND NORTHEAST
SOUTH DAKOTA UNTIL 11PM CDT/10PM MDT. THE FOLLOWING COUNTIES
ARE IN THE WATCH...JONES...LYMANN...BUFFALO...CLARK...CODINGTON...
HAMLIN...GRANT...AND DEUEL.

SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS WESTERN SOUTH DAKOTA
AND WESTERN NEBRASKA AND THEN MOVE NORTHEAST INTO THE REGION TONIGHT.
SOME OF THE STORMS MAY PRODUCE DAMAGING WINDS AND LARGE HAIL ALONG
WITH VERY HEAVY RAIN.

Local storm report, Jun 5, 5:26 PM CDT, 4 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
526 PM CDT SAT JUN 5 1999

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1010 PM    3 W MURDO                 SD   TORNADO
06/04/99   JONES                          SHERIFF SPOTTED BRIEF
                                          TOUCHDOWN AT REST AREA
                                          WHICH DAMAGED TRAILOR
                                          PART OF SEMI

END

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 5, 7:58 PM CDT	Tornado Warning	ABR	Hamlin	32 min
Jun 5, 8:30 PM CDT	Tornado Warning	ABR	Codington, Hamlin	50 min
Jun 5, 8:57 PM CDT	Severe Thunderstorm Warning	ABR	Jones	48 min
Jun 5, 9:06 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo	49 min
Jun 5, 9:12 PM CDT	Severe Thunderstorm Warning	ABR	Hand	63 min
Jun 5, 9:27 PM CDT	Severe Thunderstorm Warning	ABR	Stanley	63 min
Jun 5, 9:48 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo	47 min
Jun 5, 9:55 PM CDT	Flash Flood Warning	ABR	Buffalo	4 hr
Jun 5, 10:11 PM CDT	Severe Thunderstorm Warning	ABR	Codington	49 min
Jun 5, 10:17 PM CDT	Severe Thunderstorm Warning	ABR	Hand	48 min
Jun 6, 1:12 AM CDT	Severe Thunderstorm Warning	ABR	Roberts	48 min
Jun 6, 2:34 AM CDT	Severe Thunderstorm Warning	ABR	Corson	61 min
Jun 6, 1:08 AM CDT	Severe Thunderstorm Warning	ABR	Traverse	42 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1999 Every 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; the sounding from the Mesonet's radiosonde archive.