Alert archive / Colorado / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 145, NWS Pueblo, CO

September 30, 1998Huerfano County, Colorado

NWS Pueblo, CO issued this severe thunderstorm warning at Sep 30, 1998, 6:22 PM MDT for Huerfano County, Colorado. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 30, 1998, 6:22 PM MDT (00:22 UTC)
Expired: Sep 30, 1998, 7:25 PM MDT
In force: 63 min
Issued by: NWS Pueblo, CO
Area: Whole counties

County Huerfano County, CO

The radar

The Pueblo radar (KPUX), 110 km from the middle of the area, began a volume at 00:25 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.

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.4 hours before the alert went out and 286 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1230 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 98 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.

410 
WUUS1 KPUB 010019 RRA
SVRPUB
COC055-010125-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PUEBLO CO
622 PM MDT WED SEP 30 1998

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN HUERFANO COUNTY IN SOUTHEASTERN COLORADO

* UNTIL 725 PM MDT

* AT 618 PM MDT...RADAR SHOWED A SEVERE STORM 17 MILES NORTHEAST OF
  WALSENBURG MOVING EAST SOUTHEAST AT 15 MPH.

SOME LOCATIONS AFFECTED WILL BE ACROSS HIGHWAY 10 NORTHEAST OF
WALSENBURG THROUGH 650 PM MDT  AT THIS TIME...THE MOST LIKELY
SEVERE WEATHER WITH THIS STORM IS LARGE HAIL AND DAMAGING WINDS.
IF YOU ARE IN OR CLOSE TO THE WARNED AREA GO TO SAFETY IN A SMALL
INTERIOR ROOM AWAY FROM WINDOWS. A BASEMENT OFFERS THE BEST
PROTECTION.  SEVERE STORMS CAN PRODUCE TORNADOES WITH LITTLE WARNING.

SR/SJC

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 Sep 30, 2:05 PM MDT, 4 hours 17 minutes earlier.

Area forecast discussion, Sep 30, 2:05 PM MDT, 4 hours 17 minutes before

SOUTH CENTRAL AND SOUTHEAST COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PUEBLO CO
205 PM MDT WED SEP 30 1998

THE FORECAST CHALLENGES ABOUND TONIGHT...COVERING EVERYTHING FROM
CONVECTIVE PRECIP THIS EVENING WITH POSSIBLE SEVERE WEATHER IN S
CNTRL CO...TO WIDESPREAD STRATIFORM PRECIP ON THE PLAINS AND E
SLOPES...TO SNOW LEVELS IN THE MOUNTAINS.

THE LEADING EDGE OF THE COOLER AIR HAS MADE IT THROUGH ALL OF SE
CO AS OF 2000 UTC...BUT NOT BEFORE SOME GOOD SURFACE HEATING THIS
MORNING.  THUS...A FEW THUNDERSTORMS HAVE POPPED UP ALONG THE
RATON RIDGE.  IN S CNTRL CO...THE CONVECTIVE TEMP SHOULD BE
REACHED BY MIDAFTERNOON...AND WITH GOOD WIND SHEAR (THE 1800 UTC
AZTEC PROFILER SHOWS 20040KT AT 400 MB) AND CAPE AROUND 1000
J/KG...THERE COULD BE A FEW SEVERE STORMS LATE THIS AFTN AND EVE.

THE MODELS ARE SIMILAR ON THE MOVEMENT OF THE WRN U.S. UPPER
LOW...AND NOW LIFT IT SLOWLY E NE THROUGH 1200 UTC THU.  THIS
KEEPS SW FLOW OVER CO THROUGH TONIGHT...WITH ANTICYCLONIC UPSLOPE
CONTINUING ON THE PLAINS.  COOL ADVECTION CONTINUES ON THE PLAINS
TONIGHT...AND WILL EVENTUALLY SATURATE THE ATMOSPHERE FROM AROUND
MOUNTAIN TOP LEVEL DOWN...RESULTING IN STRATIFORM PRECIP WITH
SOME EMBEDDED CONVECTIVE PRECIP THIS EVENING.  AS THE UPPER LO
APPROACHES...SOME WEAK ISENTROPIC UPGLIDE SHOULD AID
PRECIPITATION ON THE PLAINS...MAINLY AFTER 0600 UTC THU.  THERMAL
PROFILES SUGGEST THE SNOW LEVEL DROPPING TO AROUND 11 KFT IN THE
MOUNTAINS TONIGHT...ALTHOUGH IT COULD BE LOCALLY LOWER DUE TO
THERMODYNAMIC EFFECTS.

HPC'S QPF FORECAST VALID 1200 UTC THU. LOOKS REASONABLE FOR THIS
WEATHER SCENARIO.

I HAVE NO MAJOR DISAGREEMENTS WITH FWC GUIDANCE TONIGHT.

HAYNES

In the hours before

Local storm report, Sep 30, 4:00 PM MDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
400 PM MDT WED SEP 30 1998

TIME(MDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0320 PM    6 NE DEL NORTE            CO    1.5 INCH HAIL
09/30/98   RIOGRANDE

0325 PM    7 SW LA GARITA            CO    .75 INCH HAIL
09/30/98   SAGUACHE

0341 PM    LA GARITA                 CO    .75 INCH HAIL
09/30/98   SAGUACHE

Local storm report, Sep 30, 4:00 PM MDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
400 PM MDT WED SEP 30 1998

TIME(MDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0320 PM    6 NE DEL NORTE            CO    1.5 INCH HAIL
09/30/98   RIOGRANDE

0325 PM    7 SW LA GARITA            CO    .75 INCH HAIL
09/30/98   SAGUACHE

0341 PM    LA GARITA                 CO    .75 INCH HAIL
09/30/98   SAGUACHE

Local storm report, Sep 30, 6:00 PM MDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
600 PM MDT WED SEP 30 1998

TIME(MDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0420 PM    5 N CENTER                CO    .75 INCH HAIL
09/30/98   SAGUACHE

Local storm report, Sep 30, 6:00 PM MDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
600 PM MDT WED SEP 30 1998

TIME(MDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0420 PM    5 N CENTER                CO    .75 INCH HAIL
09/30/98   SAGUACHE

The office that day

Everything else NWS Pueblo, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 30, 6:28 PM MDT	Severe Thunderstorm Warning	PUB	Las Animas	62 min
Sep 30, 6:54 PM MDT	Severe Thunderstorm Warning	PUB	Las Animas	61 min
Sep 30, 7:04 PM MDT	Severe Thunderstorm Warning	PUB	Baca	61 min
Sep 30, 7:33 PM MDT	Severe Thunderstorm Warning	PUB	Las Animas	62 min
Sep 30, 8:37 PM MDT	Severe Thunderstorm Warning	PUB	Baca	63 min
Oct 1, 12:51 PM MDT	Severe Thunderstorm Warning	PUB	Saguache	94 min
Oct 1, 1:31 PM MDT	Severe Thunderstorm Warning	PUB	Alamosa	64 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1998 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.