Alert archive / South Dakota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 15, NWS Sioux Falls, SD

June 17, 1993Hanson County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 17, 1993, 1:55 AM CDT for Hanson County, South Dakota. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jun 17, 1993, 1:55 AM CDT (06:55 UTC)
Expired
Jun 17, 1993, 2:30 AM CDT
In force
35 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Hanson County, SD

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 6.9 hours before the alert went out and 358 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, Minneapolis, MN at 00:00Z on 1993-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 186 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, Minneapolis, MN at 00:00Z on 1993-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.19395878Sfc1 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
186 J/kg
Mixed-layer CIN
-212 J/kg
Mixed-layer LCL
608 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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.

In the hours before

Special weather statement, Jun 16, 11:12 PM CDT, 2 hours 43 minutes before
IAZ013-NEZ094-095-096-SDZ066-160615-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
1112 PM CDT TUE JUN 16 1993

...THUNDERSTORMS HEADED TOWARD SIOUX CITY...

AT 1110 PM CDT RADAR SHOWED A LARGE CLUSTER OF THUNDERSTORMS 60 MILES
WEST OF SIOUX CITY. THEY WILL EXTEND FROM BERESFORD SOUTH DAKOTA TO
CONCORD NEBRASKA BY 1145 PM.

ANOTHER THUNDERSTORM WAS NEAR SUTHERLAND IOWA OR 60 MILES NORTHEAST OF
SIOUX CITY. THAT STORM SHOULD BE EAST OF OBRIEN COUNTY BY 1120 PM.

ALL OF THESE STORMS COULD PRODUCE STRONG GUSTY WIND...SMALL HAIL...
DANGEROUS LIGHTNING AND BRIEF HEAVY RAIN AS THEY MOVE EAST AT 35
MILES AN HOUR.

J QUINN
Special weather statement, Jun 16, 11:40 PM CDT, 2 hours 15 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-170600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
1141 PM CDT WED JUN 16 1993

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR OBRIEN COUNTY
IN NORTHWEST IOWA UNTIL 1 AM CDT...

AT 1140 PM CDT NO PRECIPITATION WAS OCCURRING IN THE SIOUXLAND AREA.
HOWEVER THE POTENTIAL EXISTS FOR STRONG THUNDERSTORMS TO DEVELOP NORTH
OF SIOUX CITY.

IN ADDITION STRONG THUNDERSTORMS OVER SOUTHEAST SOUTH DAKOTA AND
SOUTHWEST MINNESOTA ARE EXPECTED TO MOVE INTO NORTHWEST IOWA BY
1 AM.

MEANWHILE...CONDITIONS WILL REMAIN BREEZY AND MUGGY WITH TEMPERATURES IN
THE LOWER 80S.

HUMPHREY
Special weather statement, Jun 16, 11:41 PM CDT, 2 hours 14 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Special weather statement, Jun 16, 11:44 PM CDT, 2 hours 11 minutes before
SDZ011-012-016-017-018-019-020-MNZ017-170615-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1140 PM CDT WED JUN 16 1993

AT 1135 PM CDT RADAR INDICATED A LINE OF INTENSE THUNDERSTORMS
EXTENDING FROM SOUTH CENTRAL SOUTH DAKOTA 40 MILES SOUTHWEST OF MITCHELL
TO 40 MILES NORTHWEST OF SIOUX FALLS NEAR SALEM TO NEAR RUTHTON
MINNESOTA OR 15 NORTHEAST OF PIPESTONE. THIS LINE OF INTENSE
THUNDERSTORMS WAS PART OF LARGER AREA OF SHOWERS AND THUNDERSTORMS THAT
EXTENDED SOUTH CENTRAL SOUTH DAKOTA IN SOUTHWEST MINNESOTA. THE INTENSE
THUNDERSTORMS ALONG THIS LINE ARE CAPABLE OF PRODUCING LOCALLY HEAVY
RAIN AND HAIL. INDIVIDUAL THUNDERSTORMS IN THIS LINE WERE MOVING
NORTHEAST AT 20 MPH WHILE THE ENTIRE AREA OF SHOWERS AND THUNDERSTORMS
WAS MOVING EAST AT 10 MPH.

PERSONS IN SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA AND SOUTHWEST
MINNESOTA ESPECIALLY THOSE LIVING NEAR SMALL STREAMS AND RIVERS SHOULD
BE ALERT TO THE POSSIBLITY OF FLOODING AND MOVE IMMEDIATELY TO HIGHER
GROUND IF FLOODING OCCURS.

FLASH FLOOD WATCHES AND WARNINGS ARE IN EFFECT FOR PARTS OF SOUTHWEST
MINNESOTA AND WITH THE THUNDERSTORMS CONTINUING TO MOVE INTO THIS AREA
THE FLOODING THAT IS ALREADY OCCURING WILL ONLY BECOME WORSE.  PERSONS
LIVING IN LYON COUNTY MINNESOTA SHOULD SEEK HIGHER GROUND NOW.  PERSONS
IN LINCOLN COUNTY MINNESOTA SHOULD BE ESPECIALLY ALERT FOR RISING WATER
AND IF FLOODING IS EXPERIENCED MOVE IMMEDIATELY TO HIGH>ER GROUND.

DO NOT CROSS FLOODED ROADS AS YOUR VEHICLE MAY BE WASHED AWAY AND BECOME
A DEATH TRAP.

BEHREND
Special weather statement, Jun 17, 1:05 AM CDT, 50 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-170715-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
105 AM CDT THU JUN 17 1993

...THE SEVERE THUNDERSTORM WATCH FOR OBRIEN COUNTY HAS EXPIRED...

AT 1 AM CDT AN ISOLATED THUNDERSTORM WAS 40 MILES NORTHWEST OF SIOUX
CITY NEAR ALCESTER SOUTH DAKOTA. MOVEMENT WAS NORTHEAST AT 20 MILES AN
HOUR.

MORE THUNDERSTORMS ARE LIKELY TO DEVELOP ACROSS THE NORTH PART OF
THE SIOUXLAND AREA DURING THE PREDAWN HOURS. WHILE SEVERE WEATHER IS
NOT EXPECTED...LOCALLY HEAVY RAIN WILL BE POSSIBLE.

DROZD
Special weather statement, Jun 17, 1:05 AM CDT, 50 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-170715-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
105 AM CDT THU JUN 17 1993

...THE SEVERE THUNDERSTORM WATCH FOR OBRIEN COUNTY HAS EXPIRED...

AT 1 AM CDT AN ISOLATED THUNDERSTORM WAS 40 MILES NORTHWEST OF SIOUX
CITY NEAR ALCESTER SOUTH DAKOTA. MOVEMENT WAS NORTHEAST AT 20 MILES AN
HOUR.

MORE THUNDERSTORMS ARE LIKELY TO DEVELOP ACROSS THE NORTH PART OF
THE SIOUXLAND AREA DURING THE PREDAWN HOURS. WHILE SEVERE WEATHER IS
NOT EXPECTED...LOCALLY HEAVY RAIN WILL BE POSSIBLE.

DROZD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 7:08 PM CDTSevere Thunderstorm WarningFSDBrookings37 min
Jun 16, 9:04 PM CDTFlash Flood WarningFSDLyon4 hr
Jun 17, 1:09 AM CDTFlash Flood WarningFSDLyon4 hr

Nearby

Severe Thunderstorm Warnings in South Dakota, 1993Every severe thunderstorm warning in 1993

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.