Alert archive / Colorado / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 1, NWS Pueblo, CO

April 6, 1998Bent County, Colorado

NWS Pueblo, CO issued this severe thunderstorm warning at Apr 6, 1998, 4:27 PM MDT for Bent County, Colorado. It was in force for 63 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
Apr 6, 1998, 4:27 PM MDT (22:27 UTC)
Expired
Apr 6, 1998, 5:30 PM MDT
In force
63 min
Issued by
NWS Pueblo, CO
Area
Whole counties

County Bent County, CO

The radar

The Pueblo radar (KPUX), 112 km from the middle of the area, began a volume at 22:29 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
Apr 6, 4:37 PM MDTHail 0.88Las Animas, 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.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.5 hours before the alert went out and 213 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, Denver, CO at 12:00Z on 1998-04-06Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 1998-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 square meters per square second.1939587897Sfc1 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
1812 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
204 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.

866 
WUUS1 KPUB 062231 RRA
SVRPUB
COC011-062330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PUEBLO CO
427 PM MDT MON APR 6 1998

* SEVERE THUNDERSTORM WARNING FOR
  BENT COUNTY IN SOUTHEASTERN COLORADO

* UNTIL 530 PM MDT
 
* SOME LOCATIONS AFFECTED
  FORT LYON THROUGH 440 PM MDT
  HASTY BY 450 PM MDT

* AT 427 PM MDT RADAR SHOWED A SEVERE STORM 3 MILES NORTH OF FORT
  LYON MOVING EAST SOUTHEAST AT 15 MPH.

AT THIS TIME...THE MOST LIKELY SEVERE WEATHER WITH THIS STORM IS
LARGE HAIL AND DAMAGING WINDS.

REMEMBER...SEVERE STORMS CAN PRODUCE TORNADOES WITH LITTLE WARNING.

IF YOU ARE NEAR THIS SEVERE STORM...GO TO SHELTER IMMEDIATELY.

JK/AH

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.

NWS Pueblo, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 6, 2:15 PM MDT, 2 hours 12 minutes earlier.

Area forecast discussion, Apr 6, 2:15 PM MDT, 2 hours 12 minutes before
SOUTH CENTRAL AND SOUTHEAST COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PUEBLO CO
200 PM MDT APR 6 1998

CHALLENGE FOR TODAY IS THE IMPACT OF THE NORTHWEST TEXAS SURFACE LOW
AS IT WAITS FOR UPPER DYNAMICS. MODELS FORECAST UPPER IMPULSE TO
INTENSIFY SURFACE LOW AND MOVE IT INTO CENTRAL PLAINS. AS LOW DEEPENS
PRESSURE GRADIENT TIGHTENS UP AND ATMPOSPHERE DESTABILZES ENOUGH
FOR SCATTERED SHOWERS AND THUNDERSTORM. DEEPENING OF SURFACE LOW
WILL ALLOW HIGHER DEW POINTS TO WRAP AROUND INTO SOUTHEAST COLORADO
WITH UPSLOPE WINDS THAT WILL KEEP CLOUDS IN UNTIL O6Z OR SO.  BY 06Z
AS LOW MOVES EAST NORTHERLY WINDS...COOLER AND DRIER...WILL HELP TO
DECREASE CLOUDS OVER THE EASTERN MTNS AND PLAINS. SCATTERED SNOW
SHOWERS MAY CONTINUE OVER SOUTHWEST MOUNTAINS.  OVERNIGHT PERIOD
WILL BE COOLER AS NORTHERLY FLOW ADVECTS TEMPERATURES THAT ARE 5 TO
10 DEGREES F COOLER THAN LAST NIGHT.

WILL GO CLOSE TO GUIDANCE TEMPS BUT POPS APPEAR TOO" HIGH...MAY BE A
REFLECTION OF THE 00Z TO 06Z PERIOD...RATHER THAN LATER PERIOD. WILL
KEEP MENTION OF SNOW SHOWERS OVER MTNS ABOVE 8000FT AND RAIN SHOWERS
OVER PLAINS UNTIL MIDNIGHT.

FORTUNE

In the hours before

Special weather statement, Apr 6, 1:30 PM MDT, 2 hours 57 minutes before
COZ071-073-062035-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
130 PM MDT MON APR 6 1998

...THUNDERSTORMS WILL MOVE ACROSS SOUTHEAST EL PASO COUNTY...

A THUNDERSTORM HAS DEVELOPED RAPIDLY ACROSS NORTHERN PUEBLO
COUNTY MOVING NORTHEAST ABOUT 6 MPH AND INTO SOUTHERN EL PASO COUNTY.

THIS STORM WILL MOVE ACROSS SOUTHEAST EL PASO COUNTY BETWEEN 130
AND 300 PM REMAINING SOUTH OF TRUCKTON.

SMALL HAIL..STRONG GUSTY WINDS AND DANGEROUS LIGHTNING ARE
POSSIBLE AS THIS STORM MOVES ACROSS THE REGION.
Special weather statement, Apr 6, 1:30 PM MDT, 2 hours 57 minutes before
COZ071-073-062035-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
130 PM MDT MON APR 6 1998

...THUNDERSTORMS WILL MOVE ACROSS SOUTHEAST EL PASO COUNTY...

A THUNDERSTORM HAS DEVELOPED RAPIDLY ACROSS NORTHERN PUEBLO
COUNTY MOVING NORTHEAST ABOUT 6 MPH AND INTO SOUTHERN EL PASO COUNTY.

THIS STORM WILL MOVE ACROSS SOUTHEAST EL PASO COUNTY BETWEEN 130
AND 300 PM REMAINING SOUTH OF TRUCKTON.

SMALL HAIL..STRONG GUSTY WINDS AND DANGEROUS LIGHTNING ARE
POSSIBLE AS THIS STORM MOVES ACROSS THE REGION.
Special weather statement, Apr 6, 3:27 PM MDT, 1 hour before
COZ077>81-062230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
327 PM MDT MON APR 6 1998

...THUNDERSTORMS RUMBLING OVER THE SOUTHEAST PLAINS...

A CLUSTER OF THUNDERSTORMS WILL MOVE OVER EASTERN CROWLEY AND
EASTERN OTERO AS WELL AS WESTERN KIOWA COUNTIES THROUGH 430 PM.

ANOTHER CLUSTER OF THUNDERSTORMS WILL MOVE OVER CENTRAL KIOWA
COUNTY THROUGH 430 PM AS WELL.

THESE STORMS WILL BRING BRIEF HEAVY RAIN...SMALL HAIL AND GUSTY
WINDS TO THE AREA.

AT 320 PM...RADAR SHOWED THE STORMS MOVING EAST 10 TO 20 MPH.  IN
ADDITION...THUNDERSTORMS WERE DEVELOPING OVER EASTERN LAS ANIMAS
COUNTY.

HAYNES
Special weather statement, Apr 6, 3:27 PM MDT, 1 hour before
COZ077>81-062230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
327 PM MDT MON APR 6 1998

...THUNDERSTORMS RUMBLING OVER THE SOUTHEAST PLAINS...

A CLUSTER OF THUNDERSTORMS WILL MOVE OVER EASTERN CROWLEY AND
EASTERN OTERO AS WELL AS WESTERN KIOWA COUNTIES THROUGH 430 PM.

ANOTHER CLUSTER OF THUNDERSTORMS WILL MOVE OVER CENTRAL KIOWA
COUNTY THROUGH 430 PM AS WELL.

THESE STORMS WILL BRING BRIEF HEAVY RAIN...SMALL HAIL AND GUSTY
WINDS TO THE AREA.

AT 320 PM...RADAR SHOWED THE STORMS MOVING EAST 10 TO 20 MPH.  IN
ADDITION...THUNDERSTORMS WERE DEVELOPING OVER EASTERN LAS ANIMAS
COUNTY.

HAYNES

Nearby

Severe Thunderstorm Warnings in Colorado, 1998Every severe thunderstorm warning in 1998

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.