Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 44, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 7, 1987, 1:46 AM CDT for Ida County, Iowa. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jul 7, 1987, 1:46 AM CDT (06:46 UTC)
- Expired
- Jul 7, 1987, 2:45 AM CDT
- In force
- 59 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Ida 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, 6.8 hours before the alert went out and 138 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
- 3581 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, Jul 7, 12:45 AM CDT, 1 hour 1 minute before
^DSMSPSSUX SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 1243 AM CDT TUE JUL 7 1987 ...VERU STRONG THUNDERSTORMS MOVING ACROSS UNION COUNTY SOUTH DAKOTA... AT 1240 AM CDT RADAR INDICATED VERY STRONG THUNDERSTORMS MOVING ACROSS UNION COUNTY SOUTH DAKOTA...ABOUT 20 TO 45 MILES NORTHWEST OF SIOUX CITY. THESE THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR. THESE THUNDERSTORMS WILL PRODUCE PEA TO MARBLE SIZE HAIL...HEAVLY RAIN SHOWER AND STRONG GUSTY WINDS. RESIDENTS OF UNION COUNTY SOUTH DAKOTA SHOULD BE ON THE LOOKOUT FOR ANY SEVERE WEATHER AND TAKE SHELTER IMMEDIATELY IF IT IS OBSERVED. SHERLIN
Special weather statement, Jul 7, 12:56 AM CDT, 50 minutes before
^DSMSPSSUX SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 1255 AM CDT TUE JUL 7 1987 ...VERY STRONG THUNDERSTORMS MOVING INTO WESTERN IOWA... AT 1250 AM CDT RADAR INDICATED A LINE OF VERY STRONG THUNDERSTORMS WAS MOVING INTO WESTERN IOWA. THESE STORMS EXTENDED ALL THE WAY FROM THE EXTREME NORTHWEST CORNER OF IOWA SOUTHWARD INTO MONONA COUNTY...ABOUT 45 MILES SOUTHEAST OF SIOUX CITY. THESE THUNDERSTORMS WILL PRODUCE PEA TO MARBLE SIZE HAIL. WIND GUSTS TO AROUND 50 MILES AN HOUR...DANGEROUS LIGHTNING AND HEAVY SHOWERS. RESIDENTS OF SIOUX...PLYMOUTH...WOODBURY AND MONONA COUNTIES IN WESTERN IOWA SHOULD BE ON THE LOOKOUT FOR THESE VERY STRONG STORMS AND TAKE SHTELTER IF SEVERE WEATHER IS OBSERVED. SHERLIN
Special weather statement, Jul 7, 1:04 AM CDT, 42 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 1250 PM CDT TUE JUL 7 1987 ...A THUNDERSTORM WATCH IS IN EFFECT FOR EXTREME SOUTHEAST SOUTH DAKOTA UNTIL 4AM CDT... AT 1240 AM CDT...AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS IN EXTREME SOUTHEASTERN SOUTH DAKOTA. THE THUNDERSTORM WAS LOCATED 30 MILES SOUTH OF SIOUX FALLS. ELSEWHERE INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN COUNTINUED OVER EASTERN SOUTH DAKOTA AND SOUTHWESTERN MINNESOTA. THESE STORMS WERE LOCATED EAST OF THE JAMES RIVER FROM THE NORTH DAKOTA BORDER TO HURON AND SOUTHEAST OF A LINE FROM HURON TO MISSION...ABOUT 35 MILES WEST OF WINNER. MOVEMENT OF ALL STORMS WAS NORTHEAST AT 25 MILES AN HOUR. LARGE HAIL...DAMAGING WIND...VERY HEAVY RAINS...AND FREQUENT LIGHTNING ARE POSSIBLE WITH THESE STORMS. IF THREATENING WEATHER APPROACHES YOU SEEK SHELTER. HUTCHEON
Special weather statement, Jul 7, 1:06 AM CDT, 40 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 1250 PM CDT TUE JUL 7 1987 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR EXTREME SOUTHEAST SOUTH DAKOTA UNTIL 4AM CDT... AT 1240 AM CDT...AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS IN EXTREME SOUTHEASTERN SOUTH DAKOTA. THE THUNDERSTORM WAS LOCATED 30 MILES SOUTH OF SIOUX FALLS. ELSEWHERE INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN COUNTINUED OVER EASTERN SOUTH DAKOTA AND SOUTHWESTERN MINNESOTA. THESE STORMS WERE LOCATED EAST OF THE JAMES RIVER FROM THE NORTH DAKOTA BORDER TO HURON AND SOUTHEAST OF A LINE FROM HURON TO MISSION...ABOUT 35 MILES WEST OF WINNER. MOVEMENT OF ALL STORMS WAS NORTHEAST AT 25 MILES AN HOUR. LARGE HAIL...DAMAGING WIND...VERY HEAVY RAINS...AND FREQUENT LIGHTNING ARE POSSIBLE WITH THESE STORMS. IF THREATENING WEATHER APPROACHES YOU SEEK SHELTER. HUTCHEON
Local storm report, Jul 7, 1:43 AM CDT, 3 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
145 PM CDT TUE JUL 7 1987
1230 AM CDT RADIO STATION KVDB IN SIOUX CENTER IOWA(SIOUX COUNTY)
REPORTED POWER LINES DOWN IN HAYWARDEN IOWA.
1259 AM CDT RADIO STATION KVDB IN SIOUX CENTER IOWA(SIOUX COUNTY)
REPORTED A WIND GUST TO 67 MPH.
115 AM CDT HAIL COVERING THE GROUND AT SIOUX CENTER IOWA.
SIZE UNKNOWN. REPORT RECIEVED FROM STATION KVDB.
JANSENSpecial weather statement, Jul 7, 1:43 AM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 145 AM CDT TUE JUL 7 1987 ...SEVERE THUNDERSTORM WATCH NUMBER 333 WAS CANCELED FOR SOUTHEAST SOUTH DAKOTA... THE NATIONAL WEATHER SERVICE HAS CANCELED THE SOUTH DAKOTA PORTION OF SEVERE THUNDERSTORM WATCH NUMBER 333. SCATTERED THUNDERSTORMS CONTINUED IN SOUTHEAST SOUTH DAKOTA...BUT SEVERE THUNDERSTORMS ARE NOW UNLIKELY. THE SEVERE THUNDERSTORMS WATCH REMAINS IN EFFECT AS EARLIER ISSUED IN THE ADJOINING AREAS OF SOUTHWEST MINNESOTA...NORTHWEST IOWA... AND NORTHEAST NEBRASKA. UMLAND
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 7:12 PM CDT | Tornado Warning | FSD | Brule | 48 min |
| Jul 6, 7:55 PM CDT | Severe Thunderstorm Warning | FSD | Aurora | 65 min |
| Jul 6, 9:34 PM CDT | Severe Thunderstorm Warning | FSD | Davison | 26 min |
| Jul 6, 10:12 PM CDT | Severe Thunderstorm Warning | FSD | Lake, McCook | 48 min |
| Jul 7, 12:33 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 37 min |
| Jul 7, 1:01 AM CDT | Tornado Warning | FSD | Union | 29 min |
| Jul 7, 12:33 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 57 min |
| Jul 7, 1:00 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola, Sioux | 60 min |
| Jul 7, 1:07 AM CDT | Severe Thunderstorm Warning | FSD | Monona, Woodbury | 53 min |
| Jul 7, 1:07 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 53 min |
| Jul 7, 1:27 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien | 63 min |
| Jul 7, 2:08 AM CDT | Severe Thunderstorm Warning | FSD | Monona | 37 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1987Every severe thunderstorm warning in 1987
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.