Alert archive / Colorado / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 38, NWS Pueblo, CO

June 11, 1999El Paso County, Colorado

NWS Pueblo, CO issued this severe thunderstorm warning at Jun 11, 1999, 6:20 PM MDT for El Paso County, Colorado. It was in force for 60 min. 5 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: Jun 11, 1999, 6:20 PM MDT (00:20 UTC)
Expired: Jun 11, 1999, 7:20 PM MDT
In force: 60 min
Issued by: NWS Pueblo, CO
Area: Whole counties

County El Paso County, CO

What was reported inside it

Time	Report	Where	Remark
Jun 11, 6:20 PM MDT	Hail 1	Ellicott, CO
Jun 11, 6:22 PM MDT	Hail 0.75	Colorado Spgs, CO
Jun 11, 6:43 PM MDT	Hail 0.75	Fountain, CO
Jun 11, 6:47 PM MDT	Hail 1.5	Fountain, CO
Jun 11, 6:57 PM MDT	Hail 1	Ellicott, CO	Hail up to 6 inches deep on highway 24.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 11, 1:15 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.3 hours before the alert went out and 160 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: 26 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1482 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: -68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

499 
WUUS1 KPUB 120016 RRA
SVRPUB
COC041-120120-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PUEBLO CO
620 PM MDT FRI JUN 11 1999

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EL PASO COUNTY IN EAST CENTRAL COLORADO

* UNTIL 720 PM MDT

* AT 615 PM MDT...RADAR SHOWED A SEVERE STORMS OVER FALCON...EASTERN
  COLORADO SPRINGS...SECURITY AND FOUNTAIN MOVING SOUTHEAST AT
  20 MPH.

SOME LOCATIONS AFFECTED WILL BE SHRIEVER AFB...ELLICOTT...
SOUTHERN COLORADO SPRINGS...SECURITY AND FOUNTAIN BETWEEN 615
AND 645 PM MDT. HAIL ONE INCH IN DIAMETER HAS BEEN REPORTED WITH
THESE THUNDERSTORMS.

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

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 Jun 11, 1:45 PM MDT, 4 hours 35 minutes earlier.

Area forecast discussion, Jun 11, 1:45 PM MDT, 4 hours 35 minutes before

SOUTH CENTRAL AND SOUTHEAST COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PUEBLO
145 PM MDT FRI JUN 11 1999

THUNDERSTORMS CHANCES TO CONTINUE THROUGH THE WEEKEND.

STORMS DEVELOPING A LITTLE QUICKER THIS AFTERNOON WITH SEVERE
THUNDERSTORM WATCH JUST ISSUED. PATTERN SLOW TO CHANGE THE NEXT 2
DAYS AS SFC LOW TO THE SOUTH OF COLORADO REMAINS IN PLACE WITH E-SE
UPSLOPE FLOW CONTINUING. WEAK DISTURBANCE ROTATING OUT OF THE
WESTERN TROUGH ON SATURDAY WILL AGAIN AID CONVECTION...WHILE
WEAK UPPER TROUGH LINGERING OVER COLORADO ON SUNDAY SHOULD AID
CONVECTION ONE MORE DAY. RIDGE THEN BUILDS OVER THE WESTERN U.S.
EARLY NEXT WEEK...WITH LEAST TSRA COVERAGE EXPECTED MONDAY...THOUGH
STILL ENOUGH MOISTURE FOR SCATTERED LATE DAY CONVECTION...ESPECIALLY
OVER THE MOUNTAINS. MRF SUGGESTS STRONG SHORT WAVE TROUGH TOPPING THE
RIDGE TUESDAY...PUSHING A COLD FRONT THROUGH THE AREA BY LATE
AFTERNOON. APPEARS SIGNIFICANT UPSLOPE FLOW WILL DEVELOP LATE TUES
AND INTO WED FOR INCREASING TSRA CHANCES EASTERN MOUNTAINS AND
PLAINS. PERSISTENCE BEST BET FOR TEMPS NEXT 5 DAYS AS WARMING DUE TO
RISING HEIGHTS SHOULD BE OFFSET BY COOL UPSLOPE FLOW.

FOR THE SOUTHWEST MOUNTAINS...SUN/MON LOOK BEST FOR CONVECTION AS
WEAKENING WESTERLY FLOW ALOFT MAY ALLOW SOME MOISTURE TO WORK
WESTWARD...THOUGH ONLY SLIGHT CHANCE POPS WARRANTED. AS UPPER HIGH
STRENGTHENS BY MID-WEEK WARMER/DRIER AIR ADVECTS NORTHWARD...
SUPPRESSING ANY TSRA THREAT.

.PUB...NONE.

PETERSEN

In the hours before

Local storm report, Jun 11, 3:58 PM MDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
358 PM MDT FRI JUN 11 1999

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

0352 PM    MONUMENT                  CO    .75 INCH HAIL
06/11/99   ELPASO

Local storm report, Jun 11, 3:58 PM MDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
358 PM MDT FRI JUN 11 1999

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

0352 PM    MONUMENT                  CO    .75 INCH HAIL
06/11/99   ELPASO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 8:36 PM MDT	Severe Thunderstorm Warning	PUB	Pueblo	64 min
Jun 11, 9:12 PM MDT	Severe Thunderstorm Warning	PUB	Huerfano	63 min
Jun 12, 3:20 PM MDT	Severe Thunderstorm Warning	PUB	El Paso	65 min
Jun 12, 4:50 PM MDT	Severe Thunderstorm Warning	PUB	El Paso	65 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1999 Every severe thunderstorm warning in 1999

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.