Alert archive / Colorado / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 90, NWS Goodland, KS

July 20, 1990Elbert County, Lincoln County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Jul 20, 1990, 12:09 PM MDT for Elbert County, Lincoln County, Colorado. It was in force for 66 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 20, 1990, 12:09 PM MDT (18:09 UTC)
Expired: Jul 20, 1990, 1:15 PM MDT
In force: 66 min
Issued by: NWS Goodland, KS
Area: Whole counties

Counties Elbert County, CO, Lincoln County, CO

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 20, 12:40 PM MDT	Hail 1	Elbert, CO

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

Fort Carson/Butt, CO (KFCS), launched 12:00Z, 6.2 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 84 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1129 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 122 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 KCOS 201809
SVRCOS
COC073-039-201915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE COLORADO SPRINGS CO
1209 PM MDT FRI JUL 20 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 115 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE EAST CENTRAL PART OF COLORADO
      NORTHERN LINCOLN...EAST CENTRAL ELBERT

AT 12PM MDT LIMON RADAR INDICATED A SEVERE THUNDERSTORM...HEAVY
RAIN AND HAIL INDICATED...22 MILES NORTHWEST OF LIMON IN EAST-
CENTRAL ELBERT COUNTY.  THIS STORM IS MOVING EAST SOUTHEAST AT
10 MPH.  THIS STORM WILL LIKELY MOVE INTO LIMON IN THE NEXT 30
MINUTES.

IF SEVERE WEATHER APPROACHES YOUR AREA...GO TO A STURDY SHELTER AWAY
FROM CREEK BEDS AND OTHER LOW AREAS PRONE TO FLOODING.  REMEMBER...
A SEVERE THUNDERSTORM CAN PRODUCE LARGE HAIL...DAMAGING WIND...FREQUENT
LIGHTNING AND HEAVY RAIN THAT CAN QUICKLY FLOOD LOW LYING AREAS.

THIS SLOW MOVING STORM MAY CAUSE FLOODING OF SMALL STREAMS..UNDER-
PASSES AND OTHER LOW LYING AREAS.

 MCCAMMON

The office that day

Everything else NWS Goodland, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 7:45 PM MDT	Severe Thunderstorm Warning	GLD	El Paso	35 min
Jul 20, 1:05 PM MDT	Severe Thunderstorm Warning	GLD	El Paso	55 min
Jul 20, 1:05 PM MDT	Severe Thunderstorm Warning	GLD	Elbert	55 min
Jul 20, 2:45 PM MDT	Severe Thunderstorm Warning	GLD	El Paso, Lincoln	60 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1990 Every 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.