Alert archive / Colorado / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 237, NWS Pueblo, CO

August 19, 2017Baca County, Las Animas County, Colorado

NWS Pueblo, CO issued this severe thunderstorm warning at Aug 19, 2017, 3:07 PM MDT for Baca County, Las Animas County, Colorado. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 19, 2017, 3:07 PM MDT (21:07 UTC)
Expired: Aug 19, 2017, 3:45 PM MDT
In force: 38 min
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Baca County, CO, Las Animas County, CO

The radar

The Pueblo radar (KPUX), 167 km from the middle of the area, began a volume at 21:07 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.1 hours before the alert went out and 255 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: 691 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1767 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

438 
WUUS55 KPUB 192107
SVRPUB
COC009-071-192145-
/O.NEW.KPUB.SV.W.0237.170819T2107Z-170819T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pueblo CO
307 PM MDT SAT AUG 19 2017

The National Weather Service in Pueblo has issued a

* Severe Thunderstorm Warning for...
  West central Baca County in southeastern Colorado...
  Southeastern Las Animas County in southeastern Colorado...

* Until 345 PM MDT

* At 307 PM MDT, a severe thunderstorm was located 10 miles south of
  Kim, or 34 miles northeast of Des Moines, moving northeast at 30
  mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* This severe thunderstorm will remain over mainly rural areas of
  west central Baca and southeastern Las Animas Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3714 10350 3739 10303 3715 10287 3700 10331
      3700 10341
TIME...MOT...LOC 2107Z 241DEG 25KT 3710 10337 

HAIL...1.00IN
WIND...60MPH
 
$$

28

4 follow-up statements

781 
WWUS55 KPUB 192118
SVSPUB

Severe Weather Statement
National Weather Service Pueblo CO
318 PM MDT SAT AUG 19 2017

COC009-071-192145-
/O.CON.KPUB.SV.W.0237.000000T0000Z-170819T2145Z/
Baca CO-Las Animas CO-
318 PM MDT SAT AUG 19 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT
FOR WEST CENTRAL BACA AND SOUTHEASTERN LAS ANIMAS COUNTIES...

At 317 PM MDT, a severe thunderstorm was located 10 miles south of
Kim, or 34 miles northeast of Des Moines, moving east at 10 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

This severe thunderstorm will remain over mainly rural areas of west
central Baca and southeastern Las Animas Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3739 10303 3715 10287 3700 10331 3700 10335
      3717 10344
TIME...MOT...LOC 2117Z 252DEG 8KT 3710 10336 

HAIL...1.00IN
WIND...60MPH
 
$$

28

255 
WWUS55 KPUB 192126
SVSPUB

Severe Weather Statement
National Weather Service Pueblo CO
326 PM MDT SAT AUG 19 2017

COC009-071-192145-
/O.CON.KPUB.SV.W.0237.000000T0000Z-170819T2145Z/
Baca CO-Las Animas CO-
326 PM MDT SAT AUG 19 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT
FOR WEST CENTRAL BACA AND SOUTHEASTERN LAS ANIMAS COUNTIES...

At 325 PM MDT, a severe thunderstorm was located 8 miles south of
Kim, or 37 miles northeast of Des Moines, moving northeast at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

This severe thunderstorm will remain over mainly rural areas of west
central Baca and southeastern Las Animas Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3739 10303 3715 10287 3700 10331 3700 10332
      3717 10341
TIME...MOT...LOC 2125Z 244DEG 11KT 3712 10334 

HAIL...1.00IN
WIND...60MPH
 
$$

28

139 
WWUS55 KPUB 192131
SVSPUB

Severe Weather Statement
National Weather Service Pueblo CO
331 PM MDT SAT AUG 19 2017

COC009-071-192145-
/O.CON.KPUB.SV.W.0237.000000T0000Z-170819T2145Z/
Baca CO-Las Animas CO-
331 PM MDT SAT AUG 19 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT
FOR WEST CENTRAL BACA AND EAST CENTRAL LAS ANIMAS COUNTIES...

At 331 PM MDT, a severe thunderstorm was located 13 miles southwest
of Pritchett, or 26 miles west of Springfield, moving east at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

This severe thunderstorm will remain over mainly rural areas of west
central Baca and east central Las Animas Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3721 10291 3706 10320 3720 10333 3739 10303
TIME...MOT...LOC 2131Z 263DEG 27KT 3729 10308 

HAIL...1.00IN
WIND...60MPH
 
$$

28

292 
WWUS55 KPUB 192141
SVSPUB

Severe Weather Statement
National Weather Service Pueblo CO
341 PM MDT SAT AUG 19 2017

COC009-071-192151-
/O.EXP.KPUB.SV.W.0237.000000T0000Z-170819T2145Z/
Baca CO-Las Animas CO-
341 PM MDT SAT AUG 19 2017

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL BACA AND EAST
CENTRAL LAS ANIMAS COUNTIES WILL EXPIRE AT 345 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 3721 10291 3706 10320 3720 10333 3739 10303
TIME...MOT...LOC 2141Z 241DEG 25KT 3732 10301 

$$

28

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 Aug 19, 3:01 PM MDT, 6 minutes earlier.

Area forecast discussion, Aug 19, 3:01 PM MDT, 6 minutes before

Area Forecast Discussion
National Weather Service Pueblo CO
301 PM MDT Sat Aug 19 2017

.SHORT TERM...(This evening through Sunday)
Issued at 236 PM MDT Sat Aug 19 2017

Isolated showers/tstms are expected through the evening hours.  With
mid to upper 50 dew points over the far southeast CO plains, CAPE
values are 2000+ J/kg, although shear is under 30 kts.  However,
this area should have the best chance of seeing stronger storms.  At
this time, it looks like showers/tstms should end by midnight across
the area.  The forecast models are showing a lot of high level cloud
cover moving over the far southern areas late tonight, and then
spreading northward through Sun morning.  Thus, will increase the
cloud cover.

On Sun, it looks like showers/tstms will hold off until around noon,
but will increase across the mountains and nearby areas through the
afternoon.  At this time it looks like the southeast plains will
remain dry, but the NAM shows some pcpn developing acrs eastern Las
Animas county in the late afternoon.  Temps will again be above
average acrs the southeast plains, with highs in the mid 80s to
lower 90s.  The San Luis Valley and Upper Arkansas River valley
should see highs in the 70s.

.LONG TERM...(Sunday night through Saturday)
Issued at 236 PM MDT Sat Aug 19 2017

Active weather is expected through the middle part of the work
week with thunderstorms and widespread precipitation possible.

Sunday night and Monday...a weak area of low pressure is forecast
to hang out along the southern California coast while high
pressure builds over the Desert Southwest. This will begin to pump
moisture northward across Colorado. Expect a showers and
thunderstorms to be ongoing Sunday evening across the mountain
areas, spreading into the Plains overnight before dissipating
Monday morning. There may be some locally heavy rainfall with
stronger cells. On Monday, similar conditions are forecast with
another round of mountain showers and thunderstorms by the
afternoon hours. This activity will once again spread east into
the Plains through Monday evening. Locally heavy rainfall will
likely be possible again with stronger cells. As for eclipse
viewing across Southern Colorado, expected mid and high level
cloud cover through the morning hours (45-60% coverage) which will
likely limit viewing for most of the region.

Tuesday through Thursday...several upper disturbances are forecast
to move northward out of the Desert Southwest across Colorado.
This will combine with a cold front on Tuesday which will force
low level flow to become upslope across the Plains. This will set
the stage for widespread showers and thunderstorms across all of
southern Colorado beginning Tuesday afternoon. Expect initial
development over the mountains, which will spread east across the
Plains through the overnight hours. Locally heavy rainfall and
increased risk for flash flooding are possible, especially on area
burn scars. Very similar conditions are forecast for Wednesday and
Thursday with continued disturbances moving across Colorado out of
the Desert Southwest and low level upslope. This will also help
keep temperatures down a bit, with highs expected through this
period in the lower to mid 80s across the Plains.

Friday and Saturday...there is a lot of uncertainty heading into
next weekend with the forecast evolution. Earlier GFS runs were
bringing drier air into the region by Friday with more limited
shower and thunderstorm chances. But the latest solution this
afternoon has quite a bit more activity across Southern Colorado.
Mozley

&&

.AVIATION...(For the 00Z TAFS through 00Z Sunday evening)
Issued at 236 PM MDT Sat Aug 19 2017

VFR conditions are expected for the next 24 hrs at KCOS, KPUB and
KALS.  There could be some showers/tstms in the vicinity of the
terminal forecast sites thru this evening with gusty outflow winds
and lightning being the main threats.  Sun afternoon KALS will see
the best chances for showers/tstms, with KCOS and KPUB not expected
to see any pcpn before 00Z.

&&

.PUB WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...28
LONG TERM...MOZLEY
AVIATION...28

Hazardous weather outlook, Aug 19, 11:42 AM MDT, 3 hours 25 minutes before

Hazardous Weather Outlook
National Weather Service Pueblo CO
1142 AM MDT Sat Aug 19 2017

COZ058>089-093>099-201745-
Western Mosquito Range/East Lake County Above 11000 Ft-
Leadville Vicinity/Lake County Below 11000 Ft-
Eastern Sawatch Mountains above 11000 Ft-
Western Chaffee County Between 9000 and 11000 Ft-
Central Chaffee County Below 9000 Ft-
Western Mosquito Range/East Chaffee County above 9000Ft-
Saguache County West of Continental Divide Below 10000 Ft-
Saguache County East of Continental Divide below 10000 Ft-
La Garita Mountains Above 10000 Ft-
Upper Rio Grande Valley/Eastern San Juan Mountains Below 10000 Ft-
Eastern San Juan Mountains Above 10000 Ft-
Del Norte Vicinity/Northern San Luis Valley Below 8500 Ft-
Alamosa  Vicinity/Central San Luis Valley Below 8500 Ft-
Southern San Luis Valley-
Northern Sangre de Cristo Mountains Between 8500 And 11000 Ft-
Northern Sangre de Cristo Mountains above 11000 Ft-
Southern Sangre de Cristo Mountains Between 7500 and 11000 Ft-
Southern Sangre de Cristo Mountains Above 11000 Ft-
Northwestern Fremont County  Above 8500Ft-
Western/Central Fremont County Below 8500 Ft-
Wet Mountain Valley Below 8500 Ft-
Wet Mountains between 6300 and 10000Ft-
Wet Mountains above 10000 Ft-
Teller County/Rampart Range above 7500fT/Pike's Peak Between
7500 And 11000 Ft-Pikes Peak above 11000 Ft-
Canon City Vicinity/Eastern Fremont County-
Northern El Paso County/Monument Ridge/Rampart Range Below
7500 Ft-
Colorado Springs Vicinity/Southern El Paso County/Rampart Range
Below 7400 Ft-Pueblo Vicinity/Pueblo County Below 6300 Feet-
Walsenburg Vicinity/Upper Huerfano River Basin Below 7500 Ft-
Trinidad Vicinity/Western Las Animas County Below 7500 Ft-
Crowley County-La Junta Vicinity/Otero County-
Eastern Las Animas County-Western Kiowa County-
Eastern Kiowa County-Las Animas Vicinity/Bent County-
Lamar Vicinity/Prowers County-Springfield Vicinity/Baca County-
1142 AM MDT Sat Aug 19 2017

This hazardous weather outlook is for portions of central...east
central...south central and southeast Colorado.

.DAY ONE...This Afternoon and Tonight

Isolated thunderstorms will be possible through the evening hours.
One or two storms over the far southeast plains, mainly across
Las Animas and Baca Counties, could be on the strong side,
producing dime size hail and wind gusts to around 60 mph.
Otherwise, storms today should be fairly spotty and weak with the
primary threats being lightning and wind gusts to around 40 mph.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Isolated to scattered afternoon and evening thunderstorms will be
possible each day. The primary threats from storms on Sunday,
Monday, Thursday and Friday will be lightning, small hail, gusty
winds and locally heavy rain at times.

More intense storms are anticipated from Tuesday into Wednesday,
with these storms being capable of producing localized flash
flooding as well as hail around 1 inch in diameter and wind gusts
around 60 mph at times, in combination with hazardous lightning.

.SPOTTER INFORMATION STATEMENT...

Weather conditions that meet reporting criteria for spotters will be
possible this afternoon and evening across the far southeast
Colorado plains.

28/28

In the hours before

Special weather statement, Aug 19, 1:12 PM MDT, 1 hour 55 minutes before

Special Weather Statement
National Weather Service Pueblo CO
112 PM MDT SAT AUG 19 2017

COZ074-088-094-191945-
Southern Sangre De Cristo Mountains Between 7500 and 11000 Ft CO-
Eastern Las Animas County CO-
Trinidad Vicinity/Western Las Animas County Below 7500 Ft CO-
112 PM MDT SAT AUG 19 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL LAS ANIMAS COUNTY
UNTIL 145 PM MDT...

At 112 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles southeast of Hoehne, or 14 miles east of Trinidad, moving east
at 20 mph.

Small hail and wind gusts of 50 to 55 mph will be possible with this
storm.

Locations impacted include...
Trinchera.

LAT...LON 3704 10433 3723 10433 3727 10394 3700 10395
TIME...MOT...LOC 1912Z 270DEG 16KT 3715 10424

28

Special weather statement, Aug 19, 1:14 PM MDT, 1 hour 53 minutes before

Special Weather Statement
National Weather Service Pueblo CO
114 PM MDT SAT AUG 19 2017

COZ086-191945-
Pueblo Vicinity/Pueblo County Below 6300 Feet CO-
114 PM MDT SAT AUG 19 2017

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PUEBLO COUNTY UNTIL 145
PM MDT...

At 113 PM MDT, Doppler radar was tracking a strong thunderstorm near
Pueblo Reservoir, or 10 miles southwest of Pueblo, moving east at 20
mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Pueblo, Salt Creek, Blende and Pueblo Reservoir.

LAT...LON 3806 10482 3823 10488 3833 10450 3811 10442
TIME...MOT...LOC 1913Z 253DEG 17KT 3817 10477

28

Special weather statement, Aug 19, 1:40 PM MDT, 1 hour 27 minutes before

Special Weather Statement
National Weather Service Pueblo CO
140 PM MDT SAT AUG 19 2017

COZ088-093-094-192015-
Eastern Las Animas County CO-La Junta Vicinity/Otero County CO-
Trinidad Vicinity/Western Las Animas County Below 7500 Ft CO-
140 PM MDT SAT AUG 19 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN OTERO AND NORTH
CENTRAL LAS ANIMAS COUNTIES UNTIL 215 PM MDT...

At 140 PM MDT, Doppler radar was tracking a strong thunderstorm over
Thatcher, or 37 miles southwest of La Junta, moving east at 10 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Delhi and Thatcher.

LAT...LON 3751 10414 3769 10408 3766 10375 3740 10384
TIME...MOT...LOC 1940Z 285DEG 10KT 3759 10403

28

Special weather statement, Aug 19, 1:41 PM MDT, 1 hour 26 minutes before

Special Weather Statement
National Weather Service Pueblo CO
141 PM MDT SAT AUG 19 2017

COZ094-099-192015-
Springfield Vicinity/Baca County CO-Eastern Las Animas County CO-
141 PM MDT SAT AUG 19 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL BACA AND EAST
CENTRAL LAS ANIMAS COUNTIES UNTIL 215 PM MDT...

At 141 PM MDT, Doppler radar was tracking a strong thunderstorm near
Kim, or 36 miles west of Springfield. This storm was nearly
stationary.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
areas northeast and east of Kim.

LAT...LON 3724 10337 3741 10332 3738 10294 3712 10303
TIME...MOT...LOC 1941Z 285DEG 4KT 3731 10327

28

Special weather statement, Aug 19, 2:23 PM MDT, 44 minutes before

Special Weather Statement
National Weather Service Pueblo CO
223 PM MDT SAT AUG 19 2017

COZ094-099-192100-
Springfield Vicinity/Baca County CO-Eastern Las Animas County CO-
223 PM MDT SAT AUG 19 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL BACA AND EAST
CENTRAL LAS ANIMAS COUNTIES UNTIL 300 PM MDT...

At 223 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles northeast of Kim, or 31 miles west of Springfield, moving east
at 15 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

This storm will remain over mainly rural areas of west central Baca
and east central Las Animas Counties.

LAT...LON 3724 10325 3742 10330 3752 10299 3726 10291
TIME...MOT...LOC 2023Z 256DEG 11KT 3735 10319

28

Special weather statement, Aug 19, 2:59 PM MDT, 8 minutes before

Special Weather Statement
National Weather Service Pueblo CO
259 PM MDT SAT AUG 19 2017

COZ094-099-192130-
Springfield Vicinity/Baca County CO-Eastern Las Animas County CO-
259 PM MDT SAT AUG 19 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL BACA AND
SOUTHEASTERN LAS ANIMAS COUNTIES UNTIL 330 PM MDT...

At 259 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles south of Kim, or 33 miles northeast of Des Moines, moving
northeast at 35 mph.

Dime size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
south and east of Kim.

LAT...LON 3714 10353 3741 10308 3718 10291 3700 10334
      3700 10343
TIME...MOT...LOC 2059Z 238DEG 32KT 3710 10339

28

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 1:12 PM MDT	Special Weather Statement	PUB	Las Animas	33 min
Aug 19, 1:14 PM MDT	Special Weather Statement	PUB	Pueblo	31 min
Aug 19, 1:40 PM MDT	Special Weather Statement	PUB	Las Animas	35 min
Aug 19, 1:41 PM MDT	Special Weather Statement	PUB	Baca	34 min
Aug 19, 2:23 PM MDT	Special Weather Statement	PUB	Baca	37 min
Aug 19, 2:59 PM MDT	Special Weather Statement	PUB		31 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2017 Every severe thunderstorm warning in 2017

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.