Alert archive / Iowa / Tornado Warnings in 1998
Tornado Warning 31, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Jun 11, 1998, 10:39 PM CDT for Fremont County, Iowa. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 11, 1998, 10:39 PM CDT (03:39 UTC)
- Expired
- Jun 11, 1998, 11:15 PM CDT
- In force
- 36 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Fremont County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.7 hours before the alert went out and 91 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
- 477 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 1339 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
630 WFUS1 KOMA 120340 RRA TOROMA IAC071-120415- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1039 PM CDT THU JUN 11 1998 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * TORNADO WARNING FOR... FREMONT COUNTY IN SOUTHWESTERN IOWA * UNTIL 1115 PM CDT * AT 1038 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 34 MILES SOUTH SOUTHEAST OF DOWNTOWN OMAHA OR 5 MILES WEST NORTHWEST OF SIDNEY MOVING EAST SOUTHEAST AT 40 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... SIDNEY NOW ANDERSON NOW RIVERTON AT 1040 PM CDT FARRAGUT AT 1045 PM CDT SHENANDOAH AT 1055 PM CDT TAKE COVER IN A REINFORCED BUILDING ON THE LOWEST LEVEL IMMEDIATELY. STAY AWAY FROM WINDOWS. DAMAGE REPORTS OR OBSERVED SEVERE WEATHER CAN BE GIVEN TO LOCAL LAW ENFORCEMENT FOR RELAY TO THE NATIONAL WEATHER SERVICE. FOBERT
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Omaha, NE wrote its last area forecast discussion before this tornado warning went out at Jun 11, 2:50 PM CDT, 7 hours 49 minutes earlier.
Area forecast discussion, Jun 11, 2:50 PM CDT, 7 hours 49 minutes before
CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION...CORRECTED CCF NATIONAL WEATHER SERVICE HASTINGS NE 250 PM CDT THU JUN 11 1998 ...THUNDERSTORM CHCS WILL BE MAIN CONCERN THIS PACKAGE... 12Z UAA HAD RATHER STRONG SYS FOR THIS TIME OF YEAR LIFTING NE THRU THE PLAINS. MAIN TROF EXTENDING SOUTH FROM UPPER LO HAS CLEARED AREA TO THE EAST AND PUSHED A BULK OF THE LL MOISTURE OUT OF AREA. STRONG SPOKE OF ENERGY ROTATING SE THRU SD AND NW NEB. THIS IS ESP EVIDENT ON SAT PIX THIS AFTN WITH PRETTY GOOD AREA OF TSRAS. MOST OF THIS ENERGY SHOULD STAY NORTH OF AREA...BUT WILL KEEP SOME LOW POPS IN FCST THIS EVENING. LOWS SHOULD BE ABLE TO GET DOWN TO GUIDANCE VALUES AS DRY AIR GRADUALLY WORKS EAST BEHIND TROF...BUT WILL PAD READINGS BY A DEGREE OR TWO GIVEN AMT OF WATER STANDING AROUND IN AREAS FROM RECENT RAINS. TOMR SHOULD BE QUITE NICE WITH P SUNNY SKIES AND MILD TEMPS. TOMR NIGHT WILL ADD 30% POPS WITH WAA PATTERN/RETURN FLOW SETTING UP. ISENTROPIC LIFT APPEARS PRETTY DECENT. ONLY CONCERN IS RATHER HIGH PRES DEFICITS...BUT THAT DIDN/T MATTER ABIT WED AM. WILL BRING AFTN STORMS BACK IN FCST SAT...BUT FEEL MAIN ACITIVITY WILL BE THAT EVENING. TEMPS WARMER SAT IN ADVAFNCE OF SYS AND WILL TAKE THE 80 TO 85S ON FRI AND ADD 5 OR SO DEGREES. GRI BT 058/082/059/087/062 203 DEG
In the hours before
Special weather statement, Jun 11, 4:54 PM CDT, 5 hours 45 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-121200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 455 PM CST THU JUN 11 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE REQUIRED LATE THIS AFTERNOON OR EVENING ACROSS EASTERN NEBRASKA AND SOUTHWEST IOWA. DISCUSSION... A COLD FRONT IS WILL MOVE FROM JUST NORTHWEST OF O NEILL TO THE THROUGH EASTERN NEBRASKA AND SOUTHWEST IOWA OVERNIGHT. THUNDERSTORMS ARE POSSIBLE ANY PLACE IN EASTERN NEBRASKA AND SOUTHWEST IOWA BUT ARE MOST LIKELY TO OCCUR NEAR THIS FRONT. WHILE THERE IS SOME POSSIBILITY OF SEVERE WEATHER FROM THESE THUNDERSTORMS...THE MOST LIKELY AREA FOR PRODUCING SEVERE WEATHER IS OVER NORTHEAST NEBRASKA FROM NORFOLK AND TEKAMAH NORTHWARD THROUGH MID EVENING. LOCALLY HEAVY RAINS ARE ALSO POSSIBLE FROM THUNDERSTORMS ANYWHERE. POnWERS
Special weather statement, Jun 11, 5:55 PM CDT, 4 hours 44 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-121200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 455 PM CST THU JUN 11 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE REQUIRED LATE THIS AFTERNOON OR EVENING ACROSS EASTERN NEBRASKA AND SOUTHWEST IOWA. DISCUSSION... A COLD FRONT IS WILL MOVE FROM JUST NORTHWEST OF O NEILL TO THE THROUGH EASTERN NEBRASKA AND SOUTHWEST IOWA OVERNIGHT. THUNDERSTORMS ARE POSSIBLE ANY PLACE IN EASTERN NEBRASKA AND SOUTHWEST IOWA BUT ARE MOST LIKELY TO OCCUR NEAR THIS FRONT. WHILE THERE IS SOME POSSIBILITY OF SEVERE WEATHER FROM THESE THUNDERSTORMS...THE MOST LIKELY AREA FOR PRODUCING SEVERE WEATHER IS OVER NORTHEAST NEBRASKA FROM NORFOLK AND TEKAMAH NORTHWARD THROUGH MID EVENING. LOCALLY HEAVY RAINS ARE ALSO POSSIBLE FROM THUNDERSTORMS ANYWHERE. POWERS
Local storm report, Jun 11, 7:33 PM CDT, 3 hours 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
733 PM CDT THU JUN 11 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0625 PM 2 N RANDOLPH NE .88 INCH HAIL
06/11/98 CEDAR
0630 PM RANDOLPH NE .75 INCH HAIL
06/11/98 CEDAR
0630 PM 10 NE PIERCE NE .88 INCH HAIL
06/11/98 PIERCE
0650 PM 12 WNW WAYNE NE .75 INCH HAIL
06/11/98 WAYNE PARTIALLY COVERED GROUNDLocal storm report, Jun 11, 7:33 PM CDT, 3 hours 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
733 PM CDT THU JUN 11 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0625 PM 2 N RANDOLPH NE .88 INCH HAIL
06/11/98 CEDAR
0630 PM RANDOLPH NE .75 INCH HAIL
06/11/98 CEDAR
0630 PM 10 NE PIERCE NE .88 INCH HAIL
06/11/98 PIERCE
0650 PM 12 WNW WAYNE NE .75 INCH HAIL
06/11/98 WAYNE PARTIALLY COVERED GROUNDThe office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 8:39 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 31 min |
| Jun 11, 11:15 PM CDT | Tornado Warning | OAX | Page | 35 min |
Nearby
Tornado Warnings in Iowa, 1998Every tornado warning in 1998Tornadoes in 1998
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.