Alert archive / South Dakota / Tornado Warnings in 1999

Tornado Warning 8, NWS Aberdeen, SD

June 5, 1999Codington County, Hamlin County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jun 5, 1999, 8:30 PM CDT for Codington County, Hamlin County, South Dakota. It was in force for 50 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, 8:30 PM CDT (01:30 UTC)
Expired: Jun 5, 1999, 9:20 PM CDT
In force: 50 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

Counties Codington County, SD, Hamlin County, SD

The radar

The Aberdeen radar (KABR), 119 km from the middle of the area, began a volume at 01:34 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.

What was reported inside it

Time	Report	Where	Remark
Jun 5, 8:50 PM CDT	Hail 1.75	Watertown, 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

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.5 hours before the alert went out and 96 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

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KABR 060131 RRA
TORABR
SDC029-057-060220-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
830 PM CDT SAT JUN 5 1999

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
  CODINGTON COUNTY IN NORTHEASTERN SOUTH DAKOTA
  HAMLIN COUNTY IN NORTHEASTERN SOUTH DAKOTA

* UNTIL 920 PM CDT

* AT 828 PM CDT... ABERDEEN DOPPLER RADAR INDICATED A TORNADO 13
  MILES SOUTH OF WATERTOWN OR 13 MILES SOUTH OF WATERTOWN  MOVING
  NORTH AT 50 MPH.

* THE TORNADO WILL BE NEAR...
  WATERTOWN            AT 840 PM CDT
  KRANZBURG            AT 845 PM CDT
  RAUVILLE             AT 850 PM CDT
  WAVERLY              AT 850 PM CDT
  SOUTH SHORE          AT 900 PM CDT

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR!

DH/JCB

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Jun 5, 3:35 PM CDT, 4 hours 55 minutes earlier.

Area forecast discussion, Jun 5, 3:35 PM CDT, 4 hours 55 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTHCENTRAL AND
NORTHEAST SOUTH DAKOTA AND WEST CENTRAL MINNESOTA
NATIONAL WEATHER SERVICE ABERDEEN SD
335 PM CDT SAT JUN 5 1999

COMPUTER PBLMS TAFTN WILL PREVENT AN INDEPTH DSCN. BNDRY/TROF/FRNT
DRAPED FROM NE SD TO SWRN SD. AS SFC LO IN NEB LIFTS NORTH...THIS
BNDRY WILL ALSO LIFT NORTH AS A WARM FRONT DRAPED EAST/WEST ACROSS
STATE. WINDS IN CWA ARE VEERING TO THE EAST-SE AS LOW MOVES. THIS IS
ADVECTING IN HIGHER DWPTS AND ALLOWING FURTHER DESTABILIZATION OF
ATMOS. 18Z KABR UPR AIR FLIGHT SHOWED THAT IF SFC TEMPS CLIMBED INTO
UPPER 70S WITH DWPTS REACHING MID 60S CAP WOULD BREAK AND CAPES
CLIMB TO NR 3000 J/KG. THINK THAT PROBLEM IS 2-FOLD TNT. FIRST IS
SVR WX/MCS DEV THAT WILL FORM ACROSS SCNTRL SD INTO ERN SD. THIS
WILL FIRE ON JET DYNAMICS...STRONG LOLVL JET AND CONVERGENCE ALONG
BNDRY. 2ND PROB IS FORMATION OF STORMS OUT IN WRN SD CLOSER TO 5H
AND 7H LOWS. 7H THTA-E RIDGE POPS UP BY 00Z TNT IN WEST AND MOVES
EAST OVRNIGHT. THIS LINES UP WELL WITH 7H VORT MAX EJECTING INTO
STATE. ETA HITS QPF HARD IN THE WEST AND MOVES IT EAST OVRNIGHT.
FEEL THAT BY TIME CONVECTION GETS TO OUR CWA...SVR THREAT MAY BE
OVER...BUT HEAVY RAIN IS PSBL. MDLS HINT AT WRAPARND PCPN ON
SUN...BUT SHOULD END FROM THE WEST DURING THE AFTERNOON. SUN NIGHT
INTO MONDAY SHOULD BE DECENT AS S/W RIDGE POPS UP OVER CWA ALLOWING
WARM TEMPS WITH LOWER DWPTS.

.EXTENDED DSCN
BOTH THE MRF AND ECMWF RETROGRADE 500MB TROUGH OVER THE WESTERN
UNITED STATES ACROSS THE PACIFIC BY THURSDAY...WITH MRF PUSHING
TROUGH FARTHER WEST THAN ECMWF. 500MB RIDGE ACROSS EASTERN UNITED
STATES WILL SHIFT WESTWARD INTO THE SOUTHERN PLAINS BY THURSDAY.
WILL CONTINUE TO GO AT OR SLIGHTLY ABOVE FMR TEMPERATURES FOR HIGH
TEMPERATURES THROUGH THE PERIOD.

DAY3...WITH GULF OF MEXICO OPEN...WARM SOUTHERLY WINDS AHEAD OF A
COLD FRONT SHOULD HELP TEMPERATURES WARM WELL INTO THE 80S ACROSS
THE REGION. A COLD BY 00Z WEDNESDAY WILL BE ACROSS NORTHWEST SOUTH
DAKOTA INTO NORTH DAKOTA. MRF DOES NOT PRINT OUT ANY PRECIP AT THIS
TIME FOR TUESDAY. HOWEVER WITH A CONVERGENCE ZONE NEAR OUR COUNTY
WARNING AREA...WILL ADD A CHANCE OF AFTERNOON AND EVENING
THUNDERSTORMS ACROSS THE WEST. ANY STORMS THAT DO DEVELOP WILL MOVE
NORTHEASTWARD. WILL PROBABLY ADD A CHANCE OF STORMS ACROSS THE EAST
FOR LATE TUESDAY.

DAY4...COLD FRONT WILL SWEEP ACROSS THE REGION BRINGING A CHANCE OF
SHOWERS OR THUNDERSTORMS TO THE REGION WITH SOMEWHAT COOLER
TEMPERATURES.

DAY5...HIGH PRESSURE SHOULD DOMINATE THE WEATHER PATTERN AND WILL
BRING PARTLY CLOUDY CONDITIONS TO THE REGION.

.ABR...NONE.
HINTZ/ECKBERG

In the hours before

Local storm report, Jun 5, 3:54 PM CDT, 4 hours 36 minutes before

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

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

0930 PM    MURDO                     SD   60 MPH WIND GUST
06/04/99   JONES

1125 PM    4E CANNING                SD   60 MPH WIND GUST
06/04/99   HUGHES                         DIME TO NICKLE SIZE HAIL

0135 AM    WATERTOWN                 SD   71 MPH WIND GUST
06/05/99   CODINGTON                      70 FOOT PINES TREES DOWN

0155 AM    CLEAR LAKE                SD   60 MPH WIND GUST
06/05/99   DEUEL                          BIG TREE BLOWN DOWN OVER
                                          ROAD

0230 AM    ORTONVILLE                MN   80 MPH WIND GUST
06/05/99   BIG STONE                      4 GRAIN BINS GONE.
                                          BARRELS THROWN 100 YARDS
                                          WITHOUT TOUCHING THE
                                          GROUND

ECKBERG

Special weather statement, Jun 5, 4:40 PM CDT, 3 hours 50 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, 3 hours 4 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, 8:57 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, 9:58 PM CDT	Severe Thunderstorm Warning	ABR	Hamlin	47 min
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

Nearby

Tornado Warnings in South Dakota, 1999 Every tornado warning in 1999 Tornadoes 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; radar from the NEXRAD Level II archive.