Alert archive / Colorado / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 70, NWS Pueblo, CO

July 5, 1999Las Animas County, Colorado

NWS Pueblo, CO issued this severe thunderstorm warning at Jul 5, 1999, 8:47 PM MDT for Las Animas County, Colorado. It was in force for 58 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 5, 1999, 8:47 PM MDT (02:47 UTC)
Expired: Jul 5, 1999, 9:45 PM MDT
In force: 58 min
Issued by: NWS Pueblo, CO
Area: Whole counties

County Las Animas County, CO

The radar

The Pueblo radar (KPUX), 128 km from the middle of the area, began a volume at 02:47 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

Time	Report	Where	Remark
Jul 5, 9:10 PM MDT	Hail 0.75	Trinidad, 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.8 hours before the alert went out and 313 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: 286 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 2236 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPUB 060245 RRA
SVRPUB
COC071-060345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE PUEBLO CO
847 PM MDT MON JUL 5 1999

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LAS ANIMAS COUNTY IN SOUTHEASTERN COLORADO

* UNTIL 945 PM MDT

* AT 845 PM MDT...RADAR SHOWED A SEVERE STORM 9 MILES SOUTH OF
  TRINIDAD SHOWING LITTLE MOVEMENT.

SOME LOCATIONS AFFECTED WILL BE I-25 NEAR THE NEW MEXICO BORDER.

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.

JK/LW

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 Jul 5, 2:30 PM MDT, 6 hours 17 minutes earlier.

Area forecast discussion, Jul 5, 2:30 PM MDT, 6 hours 17 minutes before

SOUTH CENTRAL AND SOUTHEAST COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PUEBLO COLORADO
230 PM MDT MON JUL 5 1999

...FORECAST CHALLENGE IS AMOUNT OF THUNDERSTORM ACTIVITY TONIGHT
AND TUESDAY...

LATEST VISIBLE SATELLITE IMAGE AND LIGHTNING DISPLAY INDICATE
ISOLATED CONVECTION FIRING ACROSS THE SOUTHERN MOUNTAINS AND EASTERN
SAN LUIS VALLEY...WITH MUCH MORE EXTENSIVE ACTIVITY TO THE SOUTH
OVER NEW MEXICO. STEERING CURRENTS EXTREMELY WEAK AS MOST STORMS
DRIFT VERY SLOWLY TO THE SOUTH-SOUTHWEST. AT THE SURFACE...COLD FRONT
THROUGH ALL BUT THE EXTREME SOUTHEAST CORNER...WITH STRONG NORTHEAST
WINDS AND SLIGHT COOLING. DESPITE HIGH FWC POPS AND PRECIP MAX SEEN
ON THE ETA...DEEP EASTERLY FLOW SUGGESTS ANY TSRA WILL BE LIMITED TO
UPSLOPE REGIONS NEAR THE MOUNTAINS AND ACROSS THE SAN LUIS VALLEY.
LITTLE CHANCE OF STORMS DEVELOPING OVER THE EASTERN PLAINS AFTER
SUNSET WITH FROTNAL CONVERGENCE SOUTH OF THE AREA...WILL REMOVE POPS
THESE AREAS. COULD SEE SOME PATCHY LOW CLOUDS BY MORNING...THOUGH
NOT ENOUGH TO AFFECT MIN TEMPERATURES MUCH.

SAME STORY TUESDAY WITH LOW LEVEL MOISTURE AND DEEP BUT WEAK
EASTERLY FLOW IN PLACE. WILL MAINTAIN CHANCE POPS FOR MOUNTAINS...
SLIGHT CHANCE ADJACENT AREAS...BUT WILL REMOVE POPS FOR THE EASTERN
PLAINS AS NO UPPER SUPPORT TO PUSH STORMS EASTWARD. MAX TEMPS A
LITTLE COOLER TUE...ESPECIALLY IF EARLY MORNING LOW CLOUDS ARE SLOW
TO ERODE...THOUGH FWC NUMBERS LOOK TOO COOL GIVEN WARM 700 MB
TEMPS AND WILL SHADE TOWARD WARMER FAN NUMBERS. TEMPS SHOULD REBOUND
WED AS SURFACE WINDS BECOME SOUTHWESTERLY/DOWNSLOPE BY LATE IN THE
DAY. STILL ENOUGH MOISTURE OVER THE MOUNTAINS TO RETAIN SLIGHT CHANCE
POPS.

EXTENDED...MRF DEPICTS UPPER RIDGE BUILDING OVER COLORADO THURSDAY
THEN SLOWLY SHIFTING WESTWARD AND FLATTENING FRIDAY AND SATURDAY AS
STRONG A S/W DIVES INTO THE NORTHERN PLAINS. THU LOOKS LIKE THE
DRIEST/HOTTEST DAY OF THE EXTENDED...WITH FROPA AND UPSLOPE
DEVELOPING FRI/SAT FOR INCREASING PRECIP CHANCES/SLIGHTLY COOLER
TEMPS. ENOUGH MOISTURE TO KEEP PRECIP CHANCES IN THE MOUNTAINS ALL
THREE DAYS.

.PUB...NONE

PETERSEN

In the hours before

Local storm report, Jul 5, 5:49 PM MDT, 2 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
549 PM MDT MON JUL 05 1999

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

0505 PM    PRITCHETT                 CO    1 INCH HAIL
07/05/99   BACA

0535 PM    4 W SPRINGFIELD           CO    .75 INCH HAIL
07/05/99   BACA

Local storm report, Jul 5, 5:49 PM MDT, 2 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
549 PM MDT MON JUL 05 1999

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

0505 PM    PRITCHETT                 CO    1 INCH HAIL
07/05/99   BACA

0535 PM    4 W SPRINGFIELD           CO    .75 INCH HAIL
07/05/99   BACA

Local storm report, Jul 5, 6:12 PM MDT, 2 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
612 PM MDT MON JUL 05 1999

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

0546 PM 4   4 NW TWO BUTTES           CO    1.5 INCH HAIL
07/05/99   BACA

Local storm report, Jul 5, 6:12 PM MDT, 2 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
612 PM MDT MON JUL 05 1999

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

0546 PM 4   4 NW TWO BUTTES           CO    1.5 INCH HAIL
07/05/99   BACA

Local storm report, Jul 5, 8:07 PM MDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
807 PM MDT MON JUL 05 1999

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

0744 PM    8 NE CAMPO                CO    .75 INCH HAIL
07/05/99   BACA

Local storm report, Jul 5, 8:07 PM MDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
807 PM MDT MON JUL 05 1999

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

0744 PM    8 NE CAMPO                CO    .75 INCH HAIL
07/05/99   BACA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 6:17 PM MDT	Severe Thunderstorm Warning	PUB	Baca	58 min
Jul 5, 7:32 PM MDT	Severe Thunderstorm Warning	PUB	Baca	63 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; radar from the NEXRAD Level II archive.