Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 70, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 19, 1990, 4:24 AM CDT for Lyon County, Iowa. It was in force for 23 min.
The area
The counties it named.
The facts
- Issued
- Jun 19, 1990, 4:24 AM CDT (09:24 UTC)
- Expired
- Jun 19, 1990, 4:47 AM CDT
- In force
- 23 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Lyon County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 9.4 hours before the alert went out and 230 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3604 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 281 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 190926
SVRFSD
IAC119-191000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
424 AM CDT TUE JUN 19 1990
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 500 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN NORTHWEST IOWA
...LYON
SOME CITIES INCLUDED IN THIS WARNING ARE LESTER... ROCK RAPIDS AND
GEORGE IOWA.
AT 420 AM CDT RADAR INDICATE A SEVERE THUNDERSTORMS 15 MILES SOUTHEAST
OF SIOUX FALLS OR 5 MILES WEST OF LESTER IOWA MOVING EAST AT 30 MPH.
IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD GET TO A
REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES WINDS IN EXCESS
OF 60 MPH...HAIL 3/4 INCH OR LARGER...DEADLY LIGHTNING...AND HEAVY
RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA.
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.
BLOOMWhat 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 19, 3:35 AM CDT, 49 minutes before
SDZALL-190915- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 335 AM CDT TUE JUN 19 1990 AT 330 AM CDT A LINE OF INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDED ACROSS PARTS OF SOUTHEAST SOUTH DAKOTA AND SOUTHWEST MINN/ ESOTA. THE LINE WAS 20 MILES WIDE AND EXTENDED FROM 35 MILES NORTHEAST OF SIOUX FALLS NEAR PIPESTONE MINNESOTA TO 15 MILES SOUTH OF SIOUX FALLS NEAR LENNOX. THSES STORMS ARE ALSO CAPABLE OF PRODUCING HAYIL AND STRONG WINDS AS MOVE TO THEY MOVE TO THE EAST AT 40 MILES AN HOUR. BIER
Special weather statement, Jun 19, 3:36 AM CDT, 48 minutes before
SDZ018-MNZ017-190935- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 335 AM CDT TUE JUN 19 1990 AT 330 AM CDT A LINE OF INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDED ACROSS PARTS OF SOUTHEAST SOUTH DAKOTA AND SOUTHWEST MINN/ ESOTA. THE LINE WAS 20 MILES WIDE AND EXTENDED FROM 35 MILES NORTHEAST OF SIOUX FALLS NEAR PIPESTONE MINNESOTA TO 15 MILES SOUTH OF SIOUX FALLS NEAR LENNOX. THSES STORMS ARE ALSO CAPABLE OF PZRODUCING HAIL AND STRONG WINDS AS MOVE TO THEY MOVE TO THE EAST AT 40 MILES AN HOUR.
Special weather statement, Jun 19, 3:38 AM CDT, 46 minutes before
SDZ018-MNZ017-190935- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 335 AM CDT TUE JUN 19 1990 AT 330 AM CDT A LINE OF INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDED ACROSS PARTS OF SOUTHEAST SOUTH DAKOTA AND SOUTHWEST MINN/ ESOTA. THE LINE WAS 20 MILES WIDE AND EXTENDED FROM 35 MILES NORTHEAST OF SIOUX FALLS NEAR PIPESTONE MINNESOTA TO 15 MILES SOUTH OF SIOUX FALLS NEAR LENNOX. THSES STORMS ARE ALSO CAPABLE OF PRODU^CING HAIL AND STRONG WINDS AS THEY MOVE TO THE EAST AT 40 MILES AN HOUR.
Special weather statement, Jun 19, 3:48 AM CDT, 36 minutes before
SDZ011-012-017-018-190930- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 340 AM CDT TUE JUN 19 1990 AT 330 AM CDT...NUMEROUS INTENSE THUNDERSTORMS...SOME WITH VERY HEAVY RAIN AND STRONG GUSTY WINDS...CONTINUED OVER PARTS OF SOUTHEAST SOUTH DAKOTA AND INTO EXTREME SOUTHWEST MINNESOTA AND NORTHWEST IOWA WHILE SCATTERED RAIN SHOWERS CONTINUED OVER EAST CENTRAL AND NORTHEAST SOUTH DAKOTA. THE STRONGEST STORMS WERE LOCATED ON A LINE FROM SLAYTON MINNESOTA TO 15 MILES NORTHEAST OF BERESFORD SOUTH DAKOTA AND ALSO ON A LINE FROM DELL RAPIDS TO LETCHER. THESE STORMS ARE STILL CAPABLE OF PRODUCING VERY HEAVY RAINS...STRONG GUSTY WINDS AND HAIL. PERSONS IN SOUTHEASTl SOUTH DAKOTA... EXTREME SOUTHWEST MINNESOTA AND NORTHWEST IOWA SHOULD REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. MOVEMENT WAS EAST SOUTHEAST AT 60 MILES AN HOUR. PFEIFFER
Special weather statement, Jun 19, 4:17 AM CDT, 7 minutes before
SDZ018-017-MNZ017-IAZ001-191015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 415 AM CDT TUE JUN 19 1990 AT 415 AM CDT A LINE OF INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDED ACROSS PARTS OF SOUTHEAST SOUTH DAKOTA...SOUTHWEST MINN/ ESOTA AND NORTHWEST IOWA. THE LINE WAS 30 MILES WIDE AND EXTENDED FROM 35 MILES SOUTHEAST OF SIOUX FALLS NEAR GEORGE IOWA...THROUGH JUST NORTH OF SIOUX FALLS... TO 70 MILES WEST OF SIOUX FALLS NEAR MITCHELL. THSES STORMS ARE ALSO CAPABLE OF PRODUCING HAIL AND STRONG WINDS AS THEY MOVE TO THE EAST AT 30 MILES AN HOUR.
Special weather statement, Jun 19, 4:19 AM CDT, 5 minutes before
IAZ004-191015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 419 AM CDT TUE JUN 19 1990 ...STRONG THUNDERSTORMS WILL MOVE INTO OBRIEN AND NORTHWEST PLYMOUNTH COUNTIES... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR WESTERN IOWA...EASTERN NEBRASKA AND SOUTHEAST SOUTH DAKOTA UNTIL 8AM CDT. A FLASH FLOOD WATCH IS IN EFFECT FOR WESTERN IOWA AND EASTERN NEBRASKA TONIGHT. AT 415 AM CDT RADAR SHOWED STRONG THUNDERSTORMS FROM 35 MILES NORTH OF SIOUX CITY TO 65 MILES NORTHEAST OF SIOUX CITY NEAR HARTLEY IOWA. ANOTHER THUNDERSTORM WAS 50 MILES NORTHEAST OF SIOUX CITY NEAR CHEROKEE IOWA. THE STORMS WERE MOVING EAST AT 45 MPH. PEOPLE SHOULD STAY ALERT TO CHANGING WEATHER CONDITIONS AND BE PREPARED TO MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. HOPPES
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 3:11 AM CDT | Severe Thunderstorm Warning | FSD | Lyon | 64 min |
| Jun 19, 3:44 AM CDT | Severe Thunderstorm Warning | FSD | Sioux | 56 min |
| Jun 19, 4:11 AM CDT | Severe Thunderstorm Warning | FSD | Osceola | 46 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1990Every severe thunderstorm warning in 1990
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.