Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 45, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jul 1, 1992, 11:09 PM CDT for Harrison County, Iowa. It was in force for 36 min.
The area
The counties it named.
The facts
- Issued
- Jul 1, 1992, 11:09 PM CDT (04:09 UTC)
- Expired
- Jul 1, 1992, 11:45 PM CDT
- In force
- 36 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Harrison County, IA
The nearest sounding before it
Omaha, NE (KOVN), launched 00:00Z, 4.2 hours before the alert went out and 61 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
- 1215 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 1615 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 5.6
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 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 1, 6:09 PM CDT, 5 hours before
NEZ003-004-007-008-009-020100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORFOLK NE 610 PM CDT WED JUL 1 1992 ...FLASH FLOOD WATCH FOR NORTHEAST NEBRASKA TONIGHT... SHOWERS AND THUNDERSTORMS WILL BE SCATTERED ACROSS NORTH CENTRAL AND NORTHEAST NEBRASKA FOR THE REST OF THE EVENING...AND INTO THE NIGHT. SOME OF THE THUNDERSTORMS...ESPECIALLY IN NORTHEAST NEBRASKA...WILL PRODUCE VERY HEAVY RAIN. LOW TEMPERATURES TONIGHT ARE EXPECTED TO BE IN THE MID 50S TO LOWER 60S. PERSONS IN NORTHEAST NEBRASKA...ESPECIALLY THOSE WHO LIVE NEAR CREEKS AND STREAMS...SHOULD BE ALERT FOR POSSIBLE FLOODING. HAVE A PLAN OF ACTION READY TO PROTECT LIFE AND PROPERTY IF FLOODING DEVELOPS. ALSO LISTEN FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. MILLER
Special weather statement, Jul 1, 9:40 PM CDT, 1 hour 29 minutes before
NEZ003-004-007-008-009-020400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORFOLK NE 940 PM CDT WED JUL 1 1992 ...FLASH FLOOD WATCH CONTINUES FOR NORTHEAST NEBRASKA TONIGHT... SCATTERED SHOWERS AND THUNDERSTORMS WILL BE ACROSS NORTH CENTRAL AND NORTHEAST NEBRASKA THROUGH THE NIGHTTIME HOURS. SOME OF THE STORMS WILL PRODUCE LOCALLY HEAVY RAIN. PERSONS IN NORTHEAST NEBRASKA..ESPECIALLY THOSE WHO LIVE NEAR CREEKS AND STREAMS...SHOULD BE ALERT FOR POSSIBLE FLOODING. HAVE A PLAN OF ACTION READY TO PROTECT LIFE AND PROPERTY IF FLOODING DEVELOPS. MILLER
Special weather statement, Jul 1, 10:23 PM CDT, 46 minutes before
NEZ003-004-007-008-009-020430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORFOLK NE 1020 PM CDT WED JUL 1 1992 ...TORNADO WATCH FOR A SMALL PART OF NORTHEAST NEBRASKA UNTIL 4 AM... ...FLASH FLOOD WATCH CONTINUES FOR NORTHEAST NEBRASKA TONIGHT... RADAR INDICATED A STRONG THUNDERSTORM ABOUT 45 MILES NORTHWEST OF NORFOLK AT 1015 PM CDT. THIS STORM WILL TRACK NORTHEAST AT 25 MPH ACROSS KNOX COUNTY...NEAR CENTER AND BLOOMFIELD. HEAVY RAIN...SMALL HAIL AND GUSTY WIND WILL OCCUR WITH THE STORM. A TORNADO WATCH IS IN EFFECT FOR COLFAX STANTON AND CUMING COUNTIES UNTIL 4 AM CDT THURSDAY MORNING. HEAVY RAIN AND FLASH FLOODING ARE POSSIBLE IN NORTHEAST NEBRASKA THROUGH THE NIGHT. IF FLOODING DEVELOPS IN YOUR AREA...OR IF A FLASH FLOOD WARNING IS ISSUED...MOVE TO HIGHER GROUND IMMEDIATELY. MILLER
Special weather statement, Jul 1, 11:07 PM CDT, 2 minutes before
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</html>The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 10:20 PM CDT | Severe Thunderstorm Warning | OAX | Jefferson | 55 min |
| Jul 1, 10:50 PM CDT | Tornado Warning | OAX | Jefferson | 25 min |
| Jul 1, 11:20 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 25 min |
| Jul 1, 11:36 PM CDT | Severe Thunderstorm Warning | OAX | Cass | 49 min |
| Jul 2, 4:11 AM CDT | Severe Thunderstorm Warning | OAX | Saline | 19 min |
| Jul 2, 12:13 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 32 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1992Every severe thunderstorm warning in 1992
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.