Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 2, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Mar 22, 1987, 6:46 PM CST for Monona County, Iowa. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Mar 22, 1987, 6:46 PM CST (00:46 UTC)
- Expired
- Mar 22, 1987, 7:45 PM CST
- In force
- 59 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Monona 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, 0.8 hours before the alert went out and 88 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
- 3507 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 178 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 KDSM 230046 SVRSUX IAC093-133-230145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX CITY IA ISSUED BY DES MOINES IA 646 PM CST SUN MAR 22 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM CST FOR PEOPLE IN THE FOLLOWING COUNTIES OF WEST CENTRAL IOWA...IDA AND NORTHEAST MONONA AT 630 PM...MONONA COUNTY SHERIFF REPORTED GOLF BALL SIZED HAIL 1 MILE WEST OF TURIN...OR 40 MILES SOUTHEAST OF SIOUX CITY. THIS SEVERE THUNDERSTORM WAS MOVING NORTHEAST AT 30 MILES AN HOUR AND WILL MOVE THROUGH MAPLETON AND INTO IDA COUNTY BETWEEN 645 AND 7 PM. REMEMBER...A SEVERE THUNDERSTORM PRODUCES DAMAGING WI3NDS IN EXCESS OF 60 MPH...LARGE HAIL..DEADLY LIGHTNING...AND HEAVY RAINS THAT QUICKLY FLOOD LOW LYING AREAS. PEOPLE IN THE PATH OF THE STORM SHOULD TAKE COVER IMMEDIATELY. TRUETT/QUINN
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, Mar 22, 3:59 PM CST, 2 hours 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 400 PM CST SUN MAR 22 1987 ...WINTER STORM WATCH EXTREME SOUTHWEST CORNER AND SOUTH CENTRAL SOUTH DAKOTA FOR MONDAY AND MONDAY NIGHT... A STRONG LOW PRESSURE SYSTEM OVER NORTHEAST NEW MEXICO WILL MOVE SLOWLY NORTHEAST AND REACH KANSAS MONDAY. VERY MOIST AIR FEEDING INTO THIS STORM FROM THE SOUTH WILL COMBINE WITH COOL AIR OVER SOUTH DAKOTA... POSSIBLY CAUSING HEAVY SNOW IN SOUTH CENTRAL AND EXTREME SOUTHWEST SOUTH DAKOTA. THEREFORE...THE NATIONAL WEATHER SERVICE HAS ISSUED A WINTER STORM WATCH FOR THESE AREAS FOR MONDAY AND MONDAY NIGHT. IF THE HEAVY SNOW DEVELOPS...BRISK NORTH WINDS WILL CAUSE BLOWING AND DRIFTING SNOW ...RESULTING IN VERY DIFFICULT TRAVEL CONDITIONS. SIGNIFIGANT SNOW IS LESS LIKELY FURTHER WEST AND NORTH IN SOUTH DAKOTA WHILE IN THE EAST MAINLY RAIN IS EXPECTED. HOWEVER...A SLIGHT SHIFT IN THE STORM TRACK COULD CAUSE A WINTER STORM THREAT TO OTHER PARTS OF THE STATE. THIS WILL BE A SLOW MOVING STORM AND WILL AFFECT SOUTH DAKOTA THROUGH TUESDAY OR WEDNESDAY. THE NATIONAL WEATHER SERVICE WILL ISSUE REGULAR STATEMENTS ON THIS DEVELOPING STORM. WILLIAMS
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 6:46 PM CST | Severe Thunderstorm Warning | FSD | Ida | 44 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.