Alert archive / Nebraska / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 21, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Apr 26, 1991, 2:27 PM CDT for Jefferson County, Nebraska. It was in force for 63 min.
The area
The counties it named.
The facts
- Issued
- Apr 26, 1991, 2:27 PM CDT (19:27 UTC)
- Expired
- Apr 26, 1991, 3:30 PM CDT
- In force
- 63 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Jefferson County, NE
The nearest sounding before it
Omaha, NE (KOVN), launched 12:00Z, 7.5 hours before the alert went out and 143 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
- 21 J/kg
- Mixed-layer CIN
- -435 J/kg
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 531 m²/s²
- 0-3 km storm-relative helicity
- 672 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KLNK 261927
SVRLNK
NEC095-262030-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN NE
227 PM CDT FRI APR 26 1991
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 330 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE SOUTHEAST PART OF NEBRASKA
JEFFERSON
AT 220 PM RADAR INDICATED A SEVERE THUNDERSTORM IN REPUBLIC COUNTY
JUST SOUTH OF THE NEBRASKA BORDER MOVING NORTHEAST AT 40 MPH TOWARD
FAIRBURY, THOMPSON AND REYNOLDS IN JEFFERSON COUNTY.
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND NEAR WINDOWS. DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED. MOTORISTS
SHOULD AVOID LOW WATER CROSSINGS.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADWAYS QUICKLY...
AVOID DRIVING INTO AREAS WHERE WATER COVERS THE ROAD.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. IF A TORNADO IS SPOTTED...GO TO
A BASEMENT SHETLER...OTHERWISE GO TO THE CENTER OF THE BUILDING ON THE
LOWEST FLOOR.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, Apr 26, 12:17 PM CDT, 2 hours 10 minutes before
NEZ003-004-007-008-009-262330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORFOLK NE 1220 PM CDT FRI APR 26 1991 ...A TORNADO WATCH FOR NORTHEAST AND NORTHCENTRAL NEBRASKA UNTIL 8 PM CDT THIS FRIDAY EVENING... SCATTERED THUNDERSTORMS WILL BE DEVELOPING AND MOVING THROUGH THE AREA THIS AFTERNOON AND EVENING...WITH SOME SEVERE STORMS LIKELY. TEMPERATURES SHOULD TOP OUT IN THE 60S TO ABOUT 70. WINDS WILL BE GENERALLY SOUTHEAST AT 15 TO 30 MPH...BUT STRONGER AND VARIABLE IN THE VICINITY OF THUNDERSTORMS. PERSONS ARE URGED TO KEEP A CLOSE CHECK ON THE WEATHER THROUGH THIS EVENING. REVIEW SAFETY RULES...AND TAKE SHELTER IMMEDIATELY IF A WARNING IS ISSUED...OR IF THREATENING WEATHER5 APPROACHES. MILLER
Special weather statement, Apr 26, 1:05 PM CDT, 1 hour 22 minutes before
NEZ003-007-262330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORFOLK NE 100 PM CDT FRI APR 26 1991 ...A TORNADO WATCH FOR NORTHEAST AND NORTHCENTRAL NEBRASKA UNTIL 8 PM CDT THIS FRIDAY EVENING... AT 1255 PM CDT NORFOLK RADAR INDICATED A 10 MILE WIDE LINE OF THUNDERSTORMS DEVELOPING FROM 20 MILES NORTHEAST OF VALENTINE SOUTH TO ABOUT 50 MILES SOUTHEAST OF VALENTINE. THE STRONGEST STORM WAS ABOUT 15 MILES WEST OF AINSWORTH AND THIS STORM COULD CONTAIN SOME SMALL HAIL. THE STORMS APPEAR TO BE MOVING NORTH NORTHEAST AT 25 MPH AND ARE NOT SEVERE AT THE PRESENT TIME BUT COULD BECOME SO. IF YOU LIVE IN NORTHCENTRAL OR NORTHEAST NEBRASKA PLEASE KEEP UP TO DATE ON CHANGING WEATHER CONDITIONS. KLEFFMAN
Special weather statement, Apr 26, 1:16 PM CDT, 1 hour 11 minutes before
NEZ010-015-020-IAZ009-012-262330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 115 PM CDT FRI APR 26 1991 ...TORNADO WATCH FOR EASTERN NEBRASKA UNTIL 8 PM CDT... SKIES WERE CLEARING RAPIDLY OVER THE AREA WITH LOW CLOUDS AND DRIZZLE STILL TO THE NORTH OF OMAHA. SUNSHINE IN THE SOUTH WARMED TEMPERATURES INTO THE MID 70S AT 1 PM. THE OMAHA AREA WAS AROUND 70 WITH 60S NORTH- WARD IN THE COOLER. WINDS WERE GUSTING FROM THE SOUTH AT 15 TO 25 MPH. THUNDERSTORMS WILL DEVELOP DURING THE AFTERNOON AND CONTINUE THROUGH THE EVENING WITH SOME REACHING THE SEVERE LEVEL. HIGH TEMPERATURES WILL RANGE FROM AROUND 80 IN THE SOUTH TO MID 60S IN THE NORTH. WINDS WILL CONTINUE FROM THE SOUTHEAST AT 20 TO 30 MPH WITH SOME HIGHER GUSTS. ANDERSON
Special weather statement, Apr 26, 1:29 PM CDT, 58 minutes before
NEZ015-261828- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LINCOLN NE 128 PM CDT FRI APR 26 1991 ...TORNADO WATCH FOR SOUTHAST NEBRASKA UNTIL 8 PM... THE SKIES WERE CLEARING RAPIDLY OVER THE AREA BUT LOW CLOUDS AND DRIZZLE COULD STILL BE FOUND TO THE NORTH OF OMAHA. SUNSHINE WARMED TEMPERATURES INTO THE 80S BY 130 PM. THE WINDS WERE GUSTING TO 45 MILES AN HOUR. THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND CONTINUE THROUGH THE EVENING HOURS..WITH SOME REACHING THE SEVERE LEVEL. TZ
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 3:05 PM CDT | Severe Thunderstorm Warning | OAX | Saline | 55 min |
| Apr 26, 3:33 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson, Saline, Seward | 57 min |
| Apr 26, 3:33 PM CDT | Severe Thunderstorm Warning | OAX | Butler | 57 min |
| Apr 26, 4:24 PM CDT | Tornado Warning | OAX | Jefferson, Saline | 51 min |
| Apr 26, 4:44 PM CDT | Tornado Warning | OAX | Gage, Lancaster | 46 min |
| Apr 26, 5:16 PM CDT | Severe Thunderstorm Warning | OAX | Jefferson, Saline | 44 min |
| Apr 26, 5:18 PM CDT | Tornado Warning | OAX | Otoe | 42 min |
| Apr 26, 5:18 PM CDT | Tornado Warning | OAX | Cass | 57 min |
| Apr 26, 5:27 PM CDT | Severe Thunderstorm Warning | OAX | Lancaster | 63 min |
| Apr 26, 5:47 PM CDT | Tornado Warning | OAX | Sarpy | 58 min |
| Apr 26, 6:06 PM CDT | Severe Thunderstorm Warning | OAX | Douglas | 69 min |
| Apr 26, 6:09 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson, Saline | 66 min |
| Apr 26, 6:33 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 42 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1991Every severe thunderstorm warning in 1991
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.