Alert archive / Iowa / Flash Flood Warnings in 1990

Flash Flood Warning 7, NWS Omaha, NE

June 16, 1990Harrison County, Iowa

NWS Omaha, NE issued this flash flood warning at Jun 16, 1990, 4:16 AM CDT for Harrison County, Iowa. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 16, 1990, 4:16 AM CDT (09:16 UTC)
Expired
Jun 16, 1990, 7:15 AM CDT
In force
3 hr
Issued by
NWS Omaha, NE
Area
Whole counties

County Harrison County, IA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 9.3 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.

Skew-T log-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 1990-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 1990-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3621 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KOMA 160916 RRA
FFWOMA
IAC085-161215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE OMAHA NE
416 AM CDT SAT JUN 16 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 715 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE WEST CENTRAL PART OF IOWA
      HARRISON

AT 400 AM CDT THUNDERSTORMS PRODUCING VERY HEAVY RAIN WERE MOVING
INTO MISSOURI VALLEY IN HARRISON COUNTY IA...AROUND 20 MILES
NORTHEAST OF OMAHA.  THUNDERSTORMS FRIDAY NIGHT AND EARLIER
THIS MORNING HAVE ALREADY CAUSED STREAMS AND RIVERS TO REACH
BANKFULL.  THESE STORMS...COULD CAUSE FLOODING ALONG THE BOYER
AND WILLOW RIVERS...BUT MOST LIKELY FLOO.DING WOULD OCCUR ALONG
THEIR TRIBUTARIES.

PEOPLE IN THE WARNED AREA...ESPECIALLY CAMPERS...SHOULD SEEK HIGHER
GROUND WITHOUT DELAY.  MOTORISTS SHOULD USE CAUTION IN APPROACHING
LOW AREAS OF ROADS.

CHERMOK

What forecasters said that day

The local office's own words before this flash flood 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, Jun 15, 10:40 PM CDT, 5 hours 36 minutes before
NEZ003-004-007-008-009-160430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORFOLK NE
1030 PM CDT FRI JUN 15 1990

...SHOWERS AND THUNDERSTORMS BEGINNING TO MOVE INTO NORTHEAST
NEBRASKA EARLY TONIGHT...
...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PARTS OF NORTHEAST
NEBRASKA UNTIL 100 AM CDT AND A FLASH FLOOD WATCH ALL NIGHT...

AT 1030 PM CDT NORFOLK RADAR SHOWED A BAND OF STRONG THUNDERSTORMS
FROM NELIGH THROUGH NORFOLK TO WEST POINT.  THESE STORMS WERE WERE
MOVING TO THE EAST-NORTHEAST AT ABOUT 45 MPH.  THESE STORMS CONTAIN
FREQUENT AND VERY DANGEROUS LIGHTNING...HEAVY RAIN AND POSSIBLY
SOME HAIL.

THESE STORMS WILL CONTINUE TO SPREAD ACROSS MUCH OF NORTHEAST NEBRASKA
DURING lTHE NEXT HOUR.  NEW STORMS WILL LIKELY DEVELOP TO THE WEST
AND MOVE EASTWARD ACROSS NORTHEAST NEBRASKA THROUGH THE NIGHT.
DK
Special weather statement, Jun 15, 10:40 PM CDT, 5 hours 36 minutes before
NEZ10-20-160530-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
1030 PM CDT FRI JUN 15 1990

A FLASH FLOOD WATCH IS IN EFFECT FOR EASTERN NEBRASKA AND ADJACENT
SOUTHWEST IOWA TONIGHT.

AT 1020 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED THUNDERSTORMS...
SOME PRODUCING VERY HEAVY RAIN...MOVING INTO FAR EASTERN NEBRASKA.
STRONG STORMS WERE IN THE COLUMBUS AREA MOVING TOWARD THE TOWNS
OF DODGE AND NORTH BEND IN WESTERN DODGE.  STRONG STORMS ALSO EXTENDED
FROM BEATRICE TO NORTH OF PAWNEE CITY...55 MILES SOUTHEAST OF
LINCOLN.

THESE STORMS WERE PART OF A LARGE AREA OF THUNDERSTORMS THAT COVERED
MUCH OF EASTERN NEBRASKA WEST OF A LINE FROM 20 MILES WEST OF SIOUX
CITY IOWA TO 30 MILES WEST OF FALLS CITY NEBRASKA.

THESE THUNDERSTORMS WILL LIKELY PRODUCE AREAS OF HEAVY RAIN IN EASTERN
NEBRASKA.  THE GROUND OVER MUCH OF EASTERN NEBRASKA IS SATURATED FROM
RAINS OF THE LAST FEW DAYS.  PEOPLE LIVING IN LOW LYING OR FLOOD PRONE
AREAS AS WELL AS ALONG CREEKS...STREAMS AND RIVERS SHOULD STAY ALERT
TO WEATHER CONDITIONS AND BE PREPARED TO MOVE QUICKLY TO HIGH GROUND
IF A FLASH FLOOD WARNING IS ISSUED OR RISING WATER THREATENS.

CAMPERS IN THE FLASH FLOOD WATCH AREA SHOULD ALfSO LISTEN FOR
STATEMENTS AND WARNINGS AND SHOULD CONSIDER MOVING TO HIGHER GROUND
NOW.   FLASH FLOODING CAN OCCUR IN A MATTER OF MINUTES LEAVING YOU
LITTLE TIME TO REACH SAFETY.

SEELEY
Special weather statement, Jun 15, 11:07 PM CDT, 5 hours 9 minutes before
NEZALL-160430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
1105 PM CDT FRI JUN 15 1990

...TORNADO WATCH NUMBER 470 FOR CENTRAL NEBRASKA EXPIRES...
...FLASH FLOOD WATCH REMAINS IN EFFECT FOR EASTERN NEBRASKA...
...SEVERE THUNDERSTORM WATCH NUMBER 471 IN EFFECT FOR PARTS OF
EASTERN NEBRASKA UNTIL 100 AM CDT...

THE TORNADO WATCH FOR CENTRAL NEBRASKA HAS EXPIRED.  SEVERE
THUNDERSTORMS ARE STILL POSSIBLE IN EASTERN NEBRASKA FOR THE NEXT
COUPLE OF HOURS...BUT THE MAIN THREAT IS FLASH FLOODING FROM HEAVY
RAIN.  HEAVY RAIN IS FALLING IN PARTS OF NORTHEAST NEBRASKA WHERE
FLOODING ALREADY OCCURED LAST NIGHT.

LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.  REMEMBER...A
FLASH FLOOD CAN BE LIFE THREATENING.  DO NOT TRY TO DRIVE THROUGH
RUNNING WATER.
<
POLLACK
Special weather statement, Jun 15, 11:41 PM CDT, 4 hours 35 minutes before
NEZ009-015-019-160430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
1135 PM CDT FRI JUN 15 1990

...FLASH FLOOD WATCH REMAINS IN EFFECT FOR EASTERN NEBRASKA...
...SEVERE THUNDERSTORM WATCH NUMBER 471 HAS BEEN CANCELLED...

THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT FOR PARTS OF
EASTERN NEBRASKA HAS BEEN CANCELLED.  SEVERE THUNDERSTORMS ARE NO
LONGER A THREAT.  FLASH FLOODING IS STILL A MAJOR THREAT IN MUCH OF
NORTHEAST NEBRASKA WHERE HEAVY RAINS ARE FALLING.  HEAVY RAIN IS
STILL POSSIBLE LATER TONIGHT IN SOUTHEAST NEBRASKA.

POLLACK
Local storm report, Jun 16, 12:29 AM CDT, 3 hours 47 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE NORFOLK NE
1225 AM CDT SAT JUN 16 1990

TIME           EVENT

15/1130 PM CDT WIND DAMAGE... TREES DOWN... VEHICLE BLOWN OFF ROAD

RS
1000 PM CDT    60 TO 70 PMH WINDS 3 MILES WEST OF NORFOLK IN MADISON
               COUNTY.

...SUMMARY OF FLASH FLOOD EVENT ON SHELL CREEK IN PLATTE COUNTY....

BEGAN APPROXIMATELY 1000 PM CDT NEAR NEWMAN GROVE IN SOUTHWEST MADISON
COUNTY.  AT AROUND 1030 PM CDT WHAT WAS DESCRIBED AS A WALL OF WATER
MOVED THROUGH LINDSAY IN PLATTE COUNTY WASHING 18 CARS OUT OF A
MANUFACTORING PLANT PARKING LOT AND INTO THE CREEK.  WATER WAS 3 TO 4
FEET DEEP ACROSS HIGHWAY 91 THROUGH LINDSAY.  CREST REACHED DOWNSTREAM
AT PLATTE CENTER IN PLATTE COUNTY AROUND MIDNIGHT WITH A DEPTH OF 3
TO 4 FEET IN THE BUSINESS DISTRICT.  NUMEROUS PROPANE TANKS WASHED INTO
TOWN AND THE RAILROAD WAS WASHED OUT JUST WEST OF TOWN.  MANY COUNTY
ROADS REMAINED CLOSED FRIDAY MORNING DUE TO HIGH WATER?.

THERE WERE NO DEATHS OR INJURIES AND ALL PERSONS HAVE BEEN LOCATED.
PROPERTY DAMAGE WAS EXTENSIVE.
BOWMAN
Local storm report, Jun 16, 12:33 AM CDT, 3 hours 43 minutes before
STORM REPORT...CORRECTION TO TEXT... OLD REPORT ON FLOOD..
NATIONAL WEATHER SERVICE NORFOLK NE
1225 AM CDT SAT JUN 16 1990

TIME           EVENT

15/1130 PM CDT WIND DAMAGE... TREES DOWN... VEHICLE BMLOWN OFF ROAD
..............

...PREVIOUS MSG HAD OLD INFORMATION PERTAINING TO SHELL CREEK
FLOODING THAT OCCURED THURSDAY NIGHT... PLEASE DISREGARD...

RS
..

Nearby

Flash Flood Warnings in Iowa, 1990Every flash flood 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; the sounding from the Mesonet's radiosonde archive.