Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 52, NWS Omaha, NE

June 16, 1990Mills County, Pottawattamie County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jun 16, 1990, 10:55 PM CDT for Mills County, Pottawattamie County, Iowa. It was in force for 65 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
Jun 16, 1990, 10:55 PM CDT (03:55 UTC)
Expired
Jun 17, 1990, 12:00 AM CDT
In force
65 min
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Mills County, IA, Pottawattamie 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

TimeReportWhereRemark
Jun 16, 11:30 PM CDTTornado F0Pottawattamie, 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

Topeka, KS (KTOP), launched 00:00Z, 3.9 hours before the alert went out and 243 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, Topeka, KS at 00:00Z on 1990-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3235 joules per kilogram.LCLLFCEL10008507005003002001001 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, Topeka, KS at 00:00Z on 1990-06-17The 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
3235 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
1012 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
260 m²/s²
Significant tornado parameter
2.2
Supercell composite
14.2

Open this sounding in Storm Lab

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

Local storm report, Jun 16, 5:10 PM CDT, 5 hours 45 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE NORFOLK NE
510 PM CDT SAT JUN 16 1990

TIME           EVENT

400 PM CDT     MARBLE SIZE HAIL AT CROFTON IN KNOX COUNTY.

433 PM CDT     FUNNEL CLOUD 20 NORTH OF O |NEILL IN HOLT COUTNY.

435-445 PM CDT SEVERAL BRIEF TORNADO TOUCHDOWNS APPROXIMATELY 15 MILES
               NORTH OF O NEILL IN HOLT COUNTY.  POWER LINES DOWN.

458 PM CDT     FUNNEL CLOUD 7 SOUTHWEST OF PAGE IN HOLT COUNTY
BOWMAN
Local storm report, Jun 16, 6:53 PM CDT, 4 hours 2 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE NORFOLK NE
650 PM CDT SAT JUN 16 1990

TIME           EVENT

500 PM CDT     TORNADO 3 TO 4 MILES WEST OF O NEILL IN HOLT COUNTY.
               TWO FARMS DAMAGED...)SEVERAL BUILDINGS GONE.

505 PM CDT     FUNNEL CLOUD OV VERDIGRE IN KNOX COUNTY.
BOWMAN
Special weather statement, Jun 16, 7:59 PM CDT, 2 hours 56 minutes before
NEZ010-170100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
755 PM CDT SAT JUN 16 1990

...TORNADO WATCH 479 EASTERN NEBRASKA/WESTERN IOWA UNTIL 1AM CDT...
...FLASH FLOOD WATCH TONIGHT EASTERN NEBRASKA/WESTERN IOWA...

AT 745 PM CDT...OMAHA RADAR SHOWED A LINE OF STRONG THUNDERSTORMS
EXTENDED FROM SOUTHWEST OF COLUBMBUS  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
Special weather statement, Jun 16, 8:08 PM CDT, 2 hours 47 minutes before
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Special weather statement, Jun 16, 9:41 PM CDT, 1 hour 14 minutes before
NEZ004-009-170330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORFOLK NE
940 PM CDT SAT JUN 16 1990

...STRONG THUNDERSTORMS CONTINUE IN PLATTE...COLFAX AND SOUTHERN
STANTON COUNTIES...

AT 930 THIS EVENING NORFOLK RADAR SHOWED A VERY STRONG THUNDERSTORM
JUST NORTHWEST OF COLUMBUS...AND ANOTHER STRONG THUNDERSTORM FROM
CRESTON TO CLARKSON ON THE PLATTE-COLFAX-STANTON COUNTY LINE.

THESE STORMS WERE MOVING TO THE EAST AT ABOUT 25 MPH...AND WILL BRING
SOME VERY HEAVY RAIN TO EASTERN PLATTE COUNTY INCLUDING COLUMBUS...
AS WELL AS SOME VERY HEAVY RAIN TO COLFAX AND SOUTHERN STANTON
COUNTIES.

PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR RISING WATER ALONG
CREEKS...LOW SPOTS AN5D DIPS IN ROADS.
DK

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 16, 8:47 PM CDTSevere Thunderstorm WarningOAXBurt, Dodge58 min
Jun 16, 9:17 PM CDTSevere Thunderstorm WarningOAXWashington43 min
Jun 16, 9:22 PM CDTSevere Thunderstorm WarningOAXSaline68 min
Jun 16, 9:37 PM CDTSevere Thunderstorm WarningOAXLancaster68 min
Jun 16, 10:11 PM CDTSevere Thunderstorm WarningOAXCass, Sarpy64 min
Jun 16, 10:14 PM CDTSevere Thunderstorm WarningOAXGage, Jefferson, Saline46 min
Jun 16, 10:35 PM CDTSevere Thunderstorm WarningOAXDouglas, Washington55 min

Nearby

Severe Thunderstorm Warnings in Iowa, 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.