Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 76, NWS Omaha, NE

July 5, 1997Colfax County, Platte County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jul 5, 1997, 9:05 PM CDT for Colfax County, Platte County, Nebraska. It was in force for 45 min. 4 reports 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 5, 1997, 9:05 PM CDT (02:05 UTC)
Expired
Jul 5, 1997, 9:50 PM CDT
In force
45 min
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Colfax County, NE, Platte County, NE

The radar

The Omaha radar (KOAX), 83 km from the middle of the area, began a volume at 02:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jul 5, 9:16 PM CDTHail 1.5Columbus, NE
Jul 5, 9:20 PM CDTHail 0.75Schuyler, NE
Jul 5, 9:28 PM CDTHail 0.75Schuyler, NE
Jul 5, 9:28 PM CDTThunderstorm Wind 50Schuyler, NE

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.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.1 hours before the alert went out and 83 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 1997-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 817 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, Omaha, NE at 00:00Z on 1997-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
817 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
1036 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOMA 060204 RRA
SVROMA
NEC037-141-060250-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
905 PM CDT SAT JUL 5 1997

* SEVERE THUNDERSTORM WARNING FOR
  PLATTE COUNTY - IN NORTHEASTERN NEBRASKA
  WESTERN COLFAX COUNTY - IN NORTHEASTERN NEBRASKA

* UNTIL 950 PM CDT
 
* SOME LOCATIONS AFFECTED
  COLUMBUS
  RICHLAND
  PLATTE CENTER
  SCHUYLER

* AT 855 PM DOPPLER RADAR INDICATED AN AREA OF SEVERE THUNDERSTORMS
FROM 10 MILES NORTHWEST OF COLUMBUS TO 12 MILES NORTHEAST OF
COLUMBUS. MOVEMENT WAS SOUTH-SOUTHEAST AT 15 MPH.
 
PEOPLE IN THE WARNED AREA SHOULD GET INTO A REINFORCED SHELTER AND
PREPARE FOR DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN...AND
DANGEROUS LIGHTNING.

LJH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 9:27 PM CDTSevere Thunderstorm WarningOAXColfax48 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1997Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.