Alert archive / Iowa / Tornado Warnings in 1987
Tornado Warning 4, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Jul 9, 1987, 12:15 AM CDT for Page County, Iowa. It was in force for 30 min. 1 report 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
- Jul 9, 1987, 12:15 AM CDT (05:15 UTC)
- Expired
- Jul 9, 1987, 12:45 AM CDT
- In force
- 30 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Page County, IA
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 |
|---|---|---|---|
| Jul 9, 12:20 AM CDT | Tornado F1 | Page, IA |
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 00:00Z, 5.3 hours before the alert went out and 121 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
- 3603 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOMA 090515 RRA TOROMA IAC145-090545- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OMAHA NE 1215 AM CDT THU JUL 9 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1245 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHWEST IOWA...PAGE AT 1210 AM CDT A POSSIBLE TORNADO WAS INDICATED BY RADAR ABOUT 7 MILES SOUITHWEST OF CLARINDA...55 MILES NORTH OF ST JOSEPH MISSOURI. PERSONS IN THE WARNED AREA SHOULD TAKE SHELTER IN A BASEMENT IF AVAILABLE. OTHERWISE GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. CARS AND MOBILE HOMES SHOULD BE ABANDONED. IF YOU ARE CAUGHT IN THE OPEN...TRY TO HIDE IN A DEPRESSION LIKE A DITCH OR CULVERT. DAMAGE REPORTS OR OBSERVED SEVERE WEATHER SHOULD BE GIVEN TO A LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. THE SEVERE THUNDERSTORM ASSOCIATED WITH THE POSSIBLE TORNADO WAS MOVING NORTHEAST AT 15A MPH. BYRD
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.
In the hours before
Special weather statement, Jul 8, 10:56 PM CDT, 1 hour 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 1050 PM CDT WED JUL 8 1987 AT 1050 PM CDT WIDELY SCATTERED THUNDERSTORMS HAD DEVELOPED ACROSS EXTREME SOUTHEAST NEBRASKA...AND CONTINUED IN BURT COUNTY OF EAST CENTRAL NEBRASKA. A VERY INTENSE THUNDERSTORM WAS LOCATED IN EXTREME NORTHERN NEMAHA COUNTY OF SOUTHEAST NEBRASKA. THE STORM WAS 30 MILES NORTHWEST OF FALLS CITY. THIS STORM WILL PRODUCE BRIEF HEAVY DOWNPOURS...SMALL HAIL AND WIND GUSTS TO AROUND 40 MPH AS IT MOVES NORTHEAST ACROSS SOUTHEAST OTOE COUNTY NEBRASKA AND INTO SOUTHERN FREMONT COUNTY IOWA...NEAR THE TOWN OF HAMBURG BY 1145 PM CDT. BYRD
Special weather statement, Jul 8, 11:54 PM CDT, 21 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 1150 PM CDT WED JUL 8 1987 AT 1150 PM CDT STRONG THUNDERSTORMS CONTINUED IN SOUTHEAST OTOE ...AND NORTHEAST NEMAHA COUNTIES OF SOUTHEAST NEBRASKA. THESE STORMS PRODUCED SMALL HAIL IN THE TOWN OF BROCK IN NEMAHA COUNTY AROUND 11PM CDT. THESE STORMS WERE MOVING SLOWLY NORTHEAST AND WILL PRODUCE BRIEF HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WINDS AS THEY MOVE INTO SOUTHERN FREMONT COUNTY IOWA NEAR HAMBURG. SOME LOWLAND FLOODING IS ALSO POSSIBLE WITH THESE STORMS. ANOTHER VERY INTENSE THUNDERSTOM HAD DEVELOPED OVER CENTRAL PAGE COUNTY OF SOUTHWEST IOWA...5 MILES WEST OF CLARINDA. THE STORM WAS MOVING NORTHEAST AT 15 MP3H. LISTEN FOR LATER STATEMENTS AND LOOK OUT FOR SMALL STREAM OR URBAN FLOODING WITH THESE STORMS. BYRD
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 1:32 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 58 min |
| Jul 9, 4:26 AM CDT | Flash Flood Warning | OAX | Mills, Montgomery | 4 hr |
| Jul 9, 6:00 AM CDT | Flash Flood Warning | OAX | Page | 4 hr |
Nearby
Tornado Warnings in Iowa, 1987Every tornado warning in 1987Tornadoes in 1987
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.