Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 76, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 12, 1993, 4:48 PM CDT for Monona County, Iowa. It was in force for 27 min.
The area
The counties it named.
The facts
- Issued
- Aug 12, 1993, 4:48 PM CDT (21:48 UTC)
- Expired
- Aug 12, 1993, 5:15 PM CDT
- In force
- 27 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Monona County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 9.8 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
- 59 J/kg
- Mixed-layer CIN
- -246 J/kg
- Mixed-layer LCL
- 1271 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 37 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 KSUX 122152 RRA SVRSUX IAC133-122215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX CITY IA 448 PM CDT THU AUG 12 1993 THE NATIONAL WEATHER SERVICE IN SIOUX CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL IOWA ...MONONA COUNTY AT 450 PM CDT A SEVERE THUNDERSTORM WAS LOCATED 5 MILES SOUTHWEST OF RODNEY...30 MILES SOUTHEAST OF SIOUX CITY. MOVEMENT WAS SOUTHEAST AT 20 MILES AN HOUR. THIS STORM WILL AFFECT CASTANA BY 515 PM. THREE QUARTER INCH HAIL WAS REPORTED BY THE MONONA COUNTY SHERIFF AT 448 PM ALONG HIGHWAY L12 SOUTHEAST OF RODNEY. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING...AND HEAVY RAINS THAT CAN QUICKLY FLOOD LOW LYING AREAS. IF YOU ARE IN THE PATH OF THIS STORM TAKE SHELTER IN A REINFORCED BUILDING IMMEDIATELY. ASK THE NEA|REST LAW ENFORCEMENT AGENCY TO RELAY REPORTS OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE. IRELAND &
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, Aug 12, 4:34 PM CDT, 14 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-121400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 435 PM CDT THU AUG 12 1993 ...SMALL HAIL POSSIBLE WITH THUNDERSTORMS... AT 428 PM CDT A THUNDERSTORM POSSIBLY PRODUCING SMALL HAIL WAS LOCATED NEAR EMERSON NEBRASKA OR 20 MILES SOUTHWEST OF SIOUX CITY. THE STORM WAS MOVING SOUTHEAST AT 15 MILES AN HOUR. THIS STORM WILL PASS BETWEEN THURSTON AND WALTHILL AFTER 5 PM AND WILL LIKELY8 CONTINUE TO PRODUCE SMALL HAIL. OTHER STORMS WERE LOCATED FROM NORA SOUTH DAKOTA TO CASTANA IOWA. THESE STORMS MAY BE CAPABLE OF PRODUCING SMALL HAIL AT TIMES. MICHELS
Special weather statement, Aug 12, 4:35 PM CDT, 13 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-121400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 435 PM CDT THU AUG 12 1993 ...SMALL HAIL POSSIBLE WITH THUNDERSTORMS... AT 428 PM CDT A THUNDERSTORM POSSIBLY PRODUCING SMALL HAIL WAS LOCATED NEAR EMERSON NEBRASKA OR 20 MILES SOUTHWEST OF SIOUX CITY. THE STORM WAS MOVING SOUTHEAST AT 15 MILES AN HOUR. THIS STORM WILL PASS BETWEEN THURSTON AND WALTHILL AFTER 5 PM AND WILL LIKELY CONTINUE TO PRODUCE SMALL HAIL. OTHER STORMS WERE LOCATED FROM NORA SOUTH DAKOTA TO CASTANA IOWA. THESE STORMS MAY BE CAPABLE OF PRODUCING SMALL HAIL AT TIMES. MICHELS
Nearby
Severe Thunderstorm Warnings in Iowa, 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.