Alert archive / Iowa / Tornado Warnings in 1990
Tornado Warning 4, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Mar 13, 1990, 7:48 PM CST for Hamilton County, Iowa. It was in force for 52 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
- Mar 13, 1990, 7:48 PM CST (01:48 UTC)
- Expired
- Mar 13, 1990, 8:40 PM CST
- In force
- 52 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Hamilton County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 13, 7:50 PM CST | Tornado F2 | Hamilton, IA | |
| Mar 13, 8:10 PM CST | Thunderstorm Wind 61 | Hamilton, IA |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.8 hours before the alert went out and 250 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
- 3595 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 98 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 140149
TORDSM
IAC079-140240-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
748 PM CST TUE MAR 13 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 840 PM CST
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN CENTRAL IOWA
...HAMILTON
AT 738 PM NATIONAL WEATHER SERVICE RADAR INDICATED AN INTENSE
THUNDERSTORM OVER HAMILTON COUNTY...SOUTHWEST OF WEBSTER CITY...
LOCATED 45 TO 50 MILES NORTH OF DES MOINES.
THIS STORM WILL AFFECT THE CITIES OF JEWELL...ELLSWORTH...WEBSTER CITY
...AND WILLIAMS.
AT 740 PM...A TORNADO WAS SPOTTED SOUTH OF THE TOWN OF STRATFORD
IN HAMILTON COUNTY...AND THE TORNADO APPARENTLY CAUSED DAMAGE AT
A FARM.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
DOWDThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 6:09 PM CST | Severe Thunderstorm Warning | DMX | Boone, Dallas, Polk | 46 min |
| Mar 13, 7:40 PM CST | Severe Thunderstorm Warning | DMX | Hamilton | 35 min |
| Mar 13, 8:12 PM CST | Tornado Warning | DMX | Polk | 25 min |
| Mar 13, 8:30 PM CST | Tornado Warning | DMX | Story | 35 min |
| Mar 13, 9:04 PM CST | Tornado Warning | DMX | Hardin | 26 min |
| Mar 13, 11:02 PM CST | Severe Thunderstorm Warning | DMX | Crawford | 28 min |
| Mar 13, 11:44 PM CST | Severe Thunderstorm Warning | DMX | Buena Vista, Clay | 31 min |
| Mar 14, 12:20 AM CST | Severe Thunderstorm Warning | DMX | Cass, Greene, Guthrie | 25 min |
| Mar 14, 12:45 AM CST | Severe Thunderstorm Warning | DMX | Greene | 35 min |
| Mar 14, 12:45 AM CST | Severe Thunderstorm Warning | DMX | Cass | 35 min |
| Mar 14, 12:45 AM CST | Severe Thunderstorm Warning | DMX | Guthrie | 40 min |
Nearby
Tornado Warnings in Iowa, 1990Every tornado warning in 1990Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.