Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 9, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jun 29, 1993, 4:25 PM CDT for Lyon County, Osceola County, Iowa. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1993, 4:25 PM CDT (21:25 UTC)
- Expired
- Jun 29, 1993, 6:45 PM CDT
- In force
- 2 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Lyon County, IA, Osceola County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 9.4 hours before the alert went out and 232 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
- 515 J/kg
- Mixed-layer CIN
- -378 J/kg
- Mixed-layer LCL
- 1356 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 flash flood 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 29, 3:06 PM CDT, 1 hour 19 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-292100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 306 PM CDT TUE JUN 29 1993 ...STRONG THUNDERSTORMS WERE MOVING INTO OBRIEN COUNTY... AT 305 PM STRONG THUNDERSTORMS WERE 55 MILES NORTHWEST OF SIOUX CITY OR JUST WEST OF SHELDON IOWA. THEY WILL MOVE EAST AT 25 MILES AN HOUR...PASSING THROUGH SHELDON AND SANBORN AND REACHING HARTLEY AROUND 345 PM. HEAVY RAIN AND DANGEROUS LIGHTNING WILL ACCOMPANY THOSE STORMS. PEOPLE IN NORTHERN OBRIEN COUNTY SHOULD BE ALERT AND MOVE QUICKLY TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. A TORNADO WATCH IS IN EFFECT UNTIL 8 PM FOR OBRIEN AND SIOUX COUNTIES IN IOWA AND FOR UNION COUNTY SOUTH DAKOTA. J QUINN
Special weather statement, Jun 29, 3:07 PM CDT, 1 hour 18 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-292100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 306 PM CDT TUE JUN 29 1993 ...STRONG THUNDERSTORMS WERE MOVING INTO OBRIEN COUNTY... AT 305 PM STRONG THUNDERSTORMS WERE 55 MILES NORTHWEST OF SIOUX CITY OR JUST WEST OF SHELDON IOWA. THEY WILL MOVE EAST AT 25 MILES AN HOUR...PASSING THROUGH SHELDON AND SANBORN AND REACHING HARTLEY AROUND 345 PM. HEAVY RAIN AND DANGEROUS LIGHTNING WILL ACCOMPANY THOSE STORMS. PEOPLE IN NORTHERN OBRIEN COUNTY SHOULD BE ALERT AND MOVE QUICKLY TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. A TORNADO WATCH IS IN EFFECT UNTIL 8 PM FOR OBRIEN AND SIOUX COUNTIES IN IOWA AND FOR UNION COUNTY SOUTH DAKOTA. J QUINN
Special weather statement, Jun 29, 3:36 PM CDT, 49 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-292130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 336 PM CDT TUE JUN 29 1993 ...STRONG THUNDERSTORMS WERE MOVING THROUGH OBRIEN COUNTY... AT 335 PM STRONG THUNDERSTORMS WERE 60 MILES NORTHWEST OF SIOUX CITY OR NEAR ARCHER IOWA. THEY WERE MOVING EAST AT 25 MILES AN HOUR. PRIMGHAR...ARCHER AND HARTLEY CAN EXPECT HEAVY RAIN...DANGEROUS LIGHTNING...GUSTY WIND AND SMALL HAIL FROM THESE STORMS UNTIL 4 PM. PEOPLE IN NORTHERN OBRIEN COUNTY SHOULD BE ALERT AND MOVE QUICKLY TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. A TORNADO WATCH IS IN EFFECT UNTIL 8 PM FOR OBRIEN AND SIOUX COUNTIES IN IOWA AND FOR UNION COUNTY SOUTH DAKOTA. J QUINN
Special weather statement, Jun 29, 3:38 PM CDT, 47 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-292130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 336 PM CDT TUE JUN 29 1993 ...STRONG THUNDERSTORMS WERE MOVING THROUGH OBRIEN COUNTY... AT 335 PM STRONG THUNDERSTORMS WERE 60 MILES NORTHWEST OF SIOUX CITY OR NEAR ARCHER IOWA. THEY WERE MOVING EAST AT 25 MILES AN HOUR. PRIMGHAR...ARCHER AND HARTLEY CAN EXPECT HEAVY RAIN...DANGEROUS LIGHTNING...GUSTY WIND AND SMALL HAIL FROM THESE STORMS UNTIL 4 PM. PEOPLE IN NORTHERN OBRIEN COUNTY SHOULD BE ALERT AND MOVE QUICKLY TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. A TORNADO WATCH IS IN EFFECT UNTIL 8 PM FOR OBRIEN AND SIOUX COUNTIES IN IOWA AND FOR UNION COUNTY SOUTH DAKOTA. J QUINN
Special weather statement, Jun 29, 3:47 PM CDT, 38 minutes before
IAZ001-292130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 350 PM CDT TUE JUN 29 1993 ...A TORNADO WTCH IS IN EFFECT FOR SOUTHERN SOUTH DAKOTA UNTIL 5 PM CDT... AT 340 PM CDT A STRONG THUNDERSTORM WAS LOCATED IN OSCEOLA COUNTY IN NORTHWEST IOWA NEAR THE COMMUNITY OF SIBLEY. THIS THUNDERSTORM WAS MOVING TO THE EAST AT 20 MILES AN HOUR AND MAY PRODUCE HAIL...GUSTY SURFACE WINDS ...VERY HEAVY RAIN...AND DANGEROUS LIGHTNING. AT 330 PM CDT THE SHERIFFS DEPARTMENT AT SIBLEY REPORTED A FUNNEL CLOUD ASSOCIATED WITH THIS STORM. PERSONS IN OSCEOLA COUNTY INCLUDING THE COMMUNITY OF SIBLEY AND OCHEYEDAN SHOULD BE ON THE LOOKOUT FOR THIS STORM UNTIL 430 PM CDT. STAY TUNED TO YOUR LOCAL TV OR RADIO STATION FOR FURTHER STATEMENTS AND POSSIBLE WARN- INGS. BUSS
Special weather statement, Jun 29, 4:09 PM CDT, 16 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-292200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 509 PM CDT TUE JUN 29 1993 ...STRONG THUNDERSTORMS AND HEAVY RAIN NORTH AND EAST OF SIOUX CITY... AT 505 PM STRONG THUNDERSTORMS AND HEAVY RAIN WERE IN A NARROW BAND FROM NEAR SHELDON TO ARTHUR IOWA...60 MILES EAST OF SIOUX CITY. THE BAND WAS MOVING EAST AT 25 MILES AN HOUR. DANGEROUS LIGHTNING AND SMALL HAIL MAY ALSO ACCOMPANY THESE STORMS. THEY WILL MOVE EAST OF OBRIEN AND CHEROKEE COUNTIES AROUND 5 PM. A TORNADO WATCH IS IN EFFECT UNTIL 8 PM FOR OBRIEN AND SIOUX COUNTIES IN IOWA AND FOR UNION COUNTY SOUTH DAKOTA. A FLASH FLOOD WATCH IS IN EFFECT UNTIL MIDNIGHT. J QUINN
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 2:51 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 39 min |
| Jun 29, 4:40 PM CDT | Flash Flood Warning | FSD | Lyon, Osceola | 2 hr |
| Jun 29, 6:30 PM CDT | Flash Flood Warning | FSD | Lyon, Osceola | 3 hr |
Nearby
Flash Flood Warnings in Iowa, 1993Every flash flood 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.