Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 72, NWS Sioux Falls, SD

July 13, 1997Moody County, South Dakota; Pipestone County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 13, 1997, 4:36 PM CDT for Moody County, South Dakota; Pipestone County, Minnesota. It was in force for 34 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 13, 1997, 4:36 PM CDT (21:36 UTC)
Expired
Jul 13, 1997, 5:10 PM CDT
In force
34 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Pipestone County, MN, Moody County, SD

The radar

The Sioux Falls radar (KFSD), 53 km from the middle of the area, began a volume at 21:35 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

TimeReportWhereRemark
Jul 13, 4:40 PM CDTHail 1.75Trent, SD
Jul 13, 4:45 PM CDTHail 1.5Ihlen, MN

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.

IssuedProductOfficeLasted
Jul 13, 4:00 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 9.6 hours before the alert went out and 182 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-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 1997-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 825 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 1997-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
825 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
1060 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 132138 RRA
SVRFSD
MNC117-SDC101-132210-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
436 PM CDT SUN JUL 13 1997

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHEASTERN MOODY COUNTY IN EASTCENTRAL SOUTH DAKOTA
  SOUTHWESTERN PIPESTONE COUNTY IN SOUTHWESTERN MINNESOTA

* UNTIL 510 PM CDT
 
* SOME AREAS AFFECTED
  IHLEN                    AROUND 450 PM CDT
  AIRLIE                   AROUND 500 PM CDT

* AT 433 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM 16 MILES SOUTHWEST OF PIPESTONE  OR 10 MILES
  SOUTHWEST OF IHLEN MOVING NORTH AT 30 MPH.  THIS STORM HAS A
  HISTORY OF PRODUCING BASEBALL SIZE HAIL AS IT MOVED THROUGH
  NORTHEAST MINNEHAHA COUNTY EARLIER THIS AFTERNOON.
 
AT SIGNS OF AN IMPENDING STORM...TOWERING THUNDERHEADS...DARKENING
SKIES...LIGHTNING AND INCREASING WINDS...MOVE TO A PLACE OF SAFETY.
TUNE TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA OUTLET FOR THE LATEST
WEATHER INFORMATION.

HARMON

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 Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 13, 9:57 AM CDT, 6 hours 39 minutes earlier.

Area forecast discussion, Jul 13, 9:57 AM CDT, 6 hours 39 minutes before
SOUTH DAKOTA/NORTHWEST IOWA/SOUTHWEST MINNESOTA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SIOUX FALLS SD
955 AM CDT SUN JUL 13 1997

SOME ISOLATED SHOWERS REMAINED BETWEEN THE MISSOURI AND JAMES RIVERS OF
SD AT 1445Z WILE THE THUNDERSTORMS HAD MOVED BEYOND OUR CWA IN
NORTHWEST IA AND SOUTHWEST MN.  UPPER LOW IS FORECAST TO TRACK EAST
ALONG THE ND/SD BORDER THIS AFTERNOON AND EVENING.  THIS SHOULD KEEP
THE BEST CONVERGENCE AND LIFT TO THE NORTH OF OUR CWA.  BUT COOLING
ALOFT AND H5 AND DIURNAL HEATING IS EXPECTED TO CREATE SCATTERED
THUNDERSTORMS ACROSS THE CWA AS IN EARLIER FORECAST.  WILL UPDATE THE
ZONES TO CHANGE SOME WORDING AND TO SLOW DOWN THE FORECAST WIND SHIFT.

.FSD...NONE
UML(AND

In the hours before

Special weather statement, Jul 13, 11:05 AM CDT, 5 hours 31 minutes before
SIGNIFICANT WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1105 AM CDT SUN JUL 13 1997

*** SIGNIFICANT WEATHER PERTAINS TO WEATHER ELEMENTS ASSOCIATED WITH
THUNDERSTORMS. ***

.SYNOPSIS...AN UPPER LEVEL LOW WILL MOVE EAST ALONG THE NORTH DAKOTA
AND SOUTH DAKOTA BORDER THIS AFTERNOON AND EVENING.  A SURFACE TROUGH
AND WIND SHIFT IN THE WESTERN PART OF SOUTH DAKOTA WILL MOVE INTO
SOUTHWEST MINNESOTA AND NORTHWEST IOWA THIS EVENING.  WHILE THE MAIN
FOCUS FOR SEVERE THUNDERSTORMS WILL BE TO THE NORTH OF OUR AREA OF
CONCERN...SEVERE WEATHER IS STILL A POSSIBILITY AS THUNDERSTORMS
DEVELOP EARLY THIS AFTERNOON WEST OF THE MISSOURI RIVER IN CENTRAL
SOUTH DAKOTA AND SPREAD EAST ACROSS THE REGION LATER THIS AFTERNOON
AND CONTINUE INTO THE EVENING IN SOUTHWEST MINNESOTA AND NORTHWEST
IOWA.

SDZ050-052-057-058-063-140500-
AURORA-BRULE-CHARLES MIX-GREGORY-JERAULD-
INCLUDING THE CITIES OF...CHAMBERLAIN
1105 AM CDT SUN JUL 13 1997

FORECAST THROUGH MIDNIGHT:
SCATTERED THUNDERSTORMS MAY DEVELOP AFTER 2 PM WITH THE POSSIBLITY OF
SOME LARGE HAIL.  THE TUNDERSTORMS THREAT SHOULD HAVE MOVED EAST OF
THE AREA BY THIS EVENING.

* SIGNIFICANT WEATHER:
  LARGE HAIL (EQUAL TO  OR GREATER THAN 0.75 DIAMETER)

* SPOTTER ACTIVATION:
  SPOTTER ACTIVATION MAY BE NEEDED AFTER 2 PM CDT.

SDZ038>040-053>056-059>062-064>071-NEZ013-140500-
BEADLE-BON HOMME-BROOKINGS-CLAY-DAVISON-DOUGLAS-HANSON-HUTCHINSON-
KINGSBURY-LAKE-LINCOLN-MC COOK-MINER-MINNEHAHA-MOODY-SANBORN-TURNER-
UNION-YANKTON-DIXON-
INCLUDING THE CITIES OF...BROOKINGS...HURON...MITCHELL...SIOUX FALLS...
YANKTON
1105 AM CDT SUN JUL 13 1997

FORECAST THROUGH MIDNIGHT:
SCATTERED THUNDERSTORMS MAY DEVELOP AFTER 3 PM WITH THE POSSIBLITY OF
LOCALLY LARGE HAIL AND DAMAGING WIND GUSTS.

* SIGNIFICANT WEATHER:
  SEVERE WINDS (GUSTS EQUAL TO OR GREATER THAN 58 MPH)
  LARGE HAIL (EQUAL TO  OR GREATER THAN 0.75 DIAMETER)

* SPOTTER ACTIVATION:
  SPOTTER ACTIVATION MAY BE NEEDED AFTER 3 PM CDT.

MNZ071-072-080-081-089-090-097-098-IAZ001>003-012>014-020>022-031-032-
NEZ014-140500-
COTTONWOOD-JACKSON-LINCOLN-LYON-MURRAY-NOBLES-PIPESTONE-ROCK-
BUENA VISTA-CHEROKEE-CLAY-DICKINSON-IDA-LYON-OBRIEN-OSCEOLA-PLYMOUTH-
SIOUX-WOODBURY-DAKOTA-
INCLUDING THE CITIES OF...LUVERNE...PIPESTONE...SLAYTON...WORTHINGTON...
LE MARS...ROCK RAPIDS...SIOUX CENTER...SIOUX CITY...SPENCER...
SPIRIT LAKE...STORM LAKE
1105 AM CDT SUN JUL 13 1997

FORECAST THROUGH MIDNIGHT:
SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP FOR LATE AFTERNOON
AND INTO THE EVENING WITH THE POSSIBLITY OF LARGE HAIL AND DAMAGING
WIND GUSTS.

* SIGNIFICANT WEATHER:
  SEVERE WINDS (GUSTS EQUAL TO OR GREATER THAN 58 MPH)
  LARGE HAIL (EQUAL TO  OR GREATER THAN 0.75 DIAMETER)

* SPOTTER ACTIVATION:
  SPOTTER ACTIVATION MAY BE NEEDED AFTER 4 PM CDT.

UMLAND

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 5:00 AM CDTSevere Thunderstorm WarningFSDClay45 min
Jul 13, 3:50 PM CDTSevere Thunderstorm WarningFSDMinnehaha30 min
Jul 13, 4:00 PM CDTSevere Thunderstorm WarningFSDTurner20 min
Jul 13, 4:21 PM CDTSevere Thunderstorm WarningFSDMinnehaha29 min
Jul 13, 5:04 PM CDTSevere Thunderstorm WarningFSDRock31 min
Jul 13, 6:29 PM CDTSevere Thunderstorm WarningFSDCottonwood, Jackson31 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1997Severe Thunderstorm Warnings in Minnesota, 1997Every severe thunderstorm warning in 1997

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.