Alert archive / Nebraska / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 74, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Aug 2, 1990, 4:30 PM CDT for Washington County, Nebraska. It was in force for 60 min. 3 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
- Aug 2, 1990, 4:30 PM CDT (21:30 UTC)
- Expired
- Aug 2, 1990, 5:30 PM CDT
- In force
- 60 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Washington County, NE
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 |
|---|---|---|---|
| Aug 2, 4:35 PM CDT | Tornado F0 | Washington, NE | |
| Aug 2, 4:55 PM CDT | Tornado F1 | Washington, NE | |
| Aug 2, 5:20 PM CDT | Thunderstorm Wind 0 | Washington, NE |
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 12:00Z, 9.5 hours before the alert went out and 27 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
- 3607 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, Aug 2, 3:21 PM CDT, 1 hour 9 minutes before
NEZ010-015-020-IAZ009-022130- WEATHER UPDATE AND SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 305 PM CDT THU AUG 2 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM CDT FOR SOUTHEAST NEBRASKA... AT 300 PM CDT...THUNDERSTORMS WERE DEVELOPING OVER SOUTHEAST NEBRASKA AND SOUTHWEST IOWA. THE STRONGEST STORMS WERE OVER NORTHEAST YORK COUNTY ABOUT 50 MILES NORTHEAST OF LINCOLN. MORE THUNDERSTORMS WERE DEVELOPING NEAR INTERSTATE 29 ABOUT 20 MILES SOUTHEAST OF OMAHA. MORE THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON. SOME OF THESE STORMS MAY BECOME SEVERE CAPABLE OF PRODUCING LARGE HAIL ...STRONG WINDS...DANGEROUS LIGHTNING AND VERY HEAVY RAIN. PEOPLE IN SEOUTHEAST NEBRASKA AND SOUTHWEST IOWA SHOULD MONITOR THE WEATHER THIS AFTERNOON. YOU SHOULD BE PREPARED TO MOVE TO SAFE SHELTER IF THREATENING WEATHER IS OBSERVED OR IF A WARNING IS ISSUED. JOHNSON
Special weather statement, Aug 2, 4:11 PM CDT, 19 minutes before
NEZ010-022230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 405 PM CDT THU AUG 2 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM CDT FOR SOUTHEAST NEBRASKA... AT 355 PM CDT...SCATTERED THUNDERSTORMS WERE MOVING THROUGH EASTERN NEBRASKA. THE STRONGEST THUNDERSTORMS WERE OVER EASTERN DODGE AND NORTHWEST WASHINGTON COUNTIES ABOUT 30 MILES NORTHWEST OF OMAHA. THE THUNDERSTORMS WILL MOVE INTO SOUTHERN BURT COUNTY INCLUDING THE CITY OF TEKAMAH WHICH IS 35 MILES NORTH OF OMAHA BY 5 PM. IF YOU ARE IN THE PATH OF THESE STORMS...YOU CAN EXPECT STRONG GUSTY WINDS... DANGEROUS LIGHTNING...SMALL HAIL AND VERY HEAVY RAIN. YOU SHOULD MOVE TO A REINFORCED SHELTER UNTIL AFTER THE STORMS PASS. THUNDERSTORMS SHOULD CONTINUE TO DEVELOP OVER THE REGION THIS AFTERNOON. DUE TO THE SLOW MOVEMENT OF THE THUNDERSTORMS...VERY HEAVY RAIN CAN BE EXPECTED. SMALL STREAMS MAY RISE QUICKLY AND THE HEAVY RAIN RAIN WILL CAUSE PONDING OF WATER ON AREA ROADS. JOHNSON
Special weather statement, Aug 2, 4:14 PM CDT, 16 minutes before
NEZ003-004-007-008-009-030025 WEATHER UPDATE AND SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORFOLK NE 415 PM CDT THU AUG 2 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 9 PM CDT FOR THE SOUTHERN PARTS OF NORTHCENTRAL AND NORTHEAST NEBRASKA... AT 415 PM THUNDERSTORMS CONTINUED TO DEVELOPE TO THE EAST AND SOUTH OF NORFOLK FROM EAST OF COLUMBUS TO WESTPOINT. THOSE STORMS WERE MOVING EAST AT 25 MPH LIKELY REACHING THE MISSOURI RIVER BY 5 PM CDT. SOME HAIL IS POSSIBLE AS THE STORMS PASS OVER WEST POINT AROUND 430PM. THUNDERSTORMS ARE EXPECTED TO CONTINUE DEVELOPING ACROSS THE REGION INTO THE EVENING HOURS...WITH THE STRONGEST POSSIBLY PRODUCING HAIL ...STRONG GUSTY WINDS AND LOCALLY HEAVY RAINS. TEMPERATURES WILL DROP INTO THE MID 70S BY 8 PM. THE THREAT OF THUNDERSTORMS AT THE SITE OF THE ANTELOPE COUNTY FAIR IN NELIGH WILL INCREASE THROUGH THE EVENING HOURS. MILLER
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 4:55 PM CDT | Tornado Warning | OAX | Washington | 35 min |
| Aug 2, 5:25 PM CDT | Tornado Warning | OAX | Washington | 35 min |
| Aug 2, 6:02 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 58 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1990Every severe thunderstorm warning 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.