KPUB → KABQ

Executive Summary

This is an active afternoon convective day in the southern Rockies — scattered to numerous thunderstorms are developing and moving along the planned route corridor right now. Primary Risk: Two active Convective SIGMETs (69C and 70C) place thunderstorm areas in direct conflict with the KPUB–KABQ route and 12,500 ft planned altitude at the planned 22:00Z departure time, and a CWA for severe thunderstorms with tops above FL450, large hail, microbursts, and 50+ kt surface gusts is centered near the route ending at your ETD. Verdict: NO-GO at 22:00Z as filed. The single most important trigger: do not depart until Convective SIGMETs 69C and 70C (valid until 22:55Z) are superseded or cancelled by updated WSTs that show the KPUB–KABQ corridor clear — and verify CWA ZAB-103 has ended before engine start.

Route Hazards

Before Departure — What to Recheck

This briefing was generated approximately 5 minutes before your planned 22:00Z departure. The weather situation is active and changing rapidly.

1. Convective SIGMETs 69C and 70C (valid until 22:55Z): Check for updated WST issuances from ZKC. Do not depart until both are superseded by updated products showing the KPUB–KABQ corridor clear. The outlook language in both SIGMETs explicitly states "WST ISSUANCES EXPD" — additional convective SIGMETs are anticipated.
2. CWA ZAB-103: This CWA for severe thunderstorms (large hail, microbursts, 50+ kt gusts, tops above FL450) is scheduled to end at 22:00Z — your ETD. Verify with FSS or check aviationweather.gov that it has expired and has not been reissued or extended before engine start.
3. TFR NOTAM 6/9111 (Los Alamos, NM): Active surface to 14,500 ft MSL through Aug 10, direct route conflict at planned altitude. You must either confirm your routing avoids it laterally, obtain a routing modification, or obtain a clearance through it before departure. This is a hard stop.
4. Updated radar and convective products: Check current NEXRAD on aviationweather.gov before engine start. Remember: ground radar is several minutes old, and cockpit datalink NEXRAD can be 15–20+ minutes older than its displayed timestamp (NTSB Safety Alert SA-017) — it shows where weather was, not where it is. Look for clear corridors on multiple updated frames, not a single snapshot.
5. KABQ PROB30 window: The KABQ TAF shows a PROB30 for TSRA from 23:00Z to 02:00Z — which covers your estimated arrival at 23:20Z. Confirm this group has not been upgraded to a TEMPO or FM group in a revised TAF.
6. What would change the NO-GO call: Updated WSTs removing both 69C and 70C conflicts from the corridor AND CWA ZAB-103 confirmed expired AND current radar showing no cells on the direct route with a clear corridor of at least 20 nm width. All three conditions must be met.

Leaving KPUB — Departure at 2026-07-29 16:00 MDT (2026-07-29 22:00Z)

Current conditions at KPUB (observed 2053Z): skies clear, 10 SM visibility, winds 100°/8 kt gusting 17 kt, temperature 31°C/dew point 17°C, altimeter 30.00. Density altitude approximately 7,651 ft — account for reduced climb performance, especially on 08L/26R (4,690 ft of runway). VFR at the field at observation time.

The TAF for KPUB at departure (22:00Z group): winds 120°/10 kt, visibility greater than 6 SM, scattered clouds at 10,000 ft and 18,000 ft — a VMC departure at the field itself. However, a PROB30 for thunderstorms with winds VRB/20G35 kt and broken ceiling at 8,000 ft (cumulonimbus) runs from 21:00Z to 24:00Z, meaning that window is already open at your 22:00Z departure time.

The departure sky will look deceptively benign from the ramp — but Convective SIGMETs 69C and 70C describe an active thunderstorm area beginning essentially at KPUB's doorstep (30 NE PUB is the northern anchor of SIGMET 70C). Lightning is noted to the southwest in the current KPUB METAR. This is not a VMC-versus-IMC departure question — it is a question of departing into an active convective SIGMET area. The AFD from WFO PUB explicitly states thunderstorms will be "likely" at KPUB "late this afternoon and especially this evening" with heavy rain and strong gusty outflow winds.

Confirm tower hours with the Chart Supplement/NOTAMs. The A/FD staffing schedule shows 0600–2200 local; this departure is at 1600 MDT, well within staffing hours. For CD when ATCT closed: Denver APCH at 303-342-1916; Denver ARTCC at 303-651-4257.

The Ride at 12,500 ft

Winds Aloft

The route is southwestbound. At 12,000 ft, winds are out of the south-southwest to west-southwest along the entire route, producing a headwind component throughout:

Winds are light throughout — single-digit to low-teens knots. Headwind component is 7–9 kt along the bulk of the route. Expect a modest groundspeed penalty; this is not a performance-critical headwind. Ridge-level wind speeds (below 20 kt) indicate minimal terrain-induced turbulence from mountain wave in clear air.

Ride Quality

In clear air away from convection, the ride at 12,500 ft should be light chop to smooth. The GTG product at FL120 shows predominantly light turbulence values along the CO/NM corridor in clear air, and PIREPs in the broader region are smooth to light chop below FL200 away from convection (APA PIREP at FL070 smooth, DEN PIREP 30 S DEN at FL190 light chop).

However, the practical ride quality is irrelevant if convection is on route: Convective SIGMETs 69C and 70C describe an active thunderstorm complex spanning the route corridor with tops above FL420–FL450. Severe turbulence is certain inside active cells at any altitude. The G-AIRMET Turb/LLWS shows TurbHi 320–420 over central/southern Colorado and into northern New Mexico — the cells themselves are the turbulence source, not jet-stream or terrain wave.

Icing

Temperatures at 12,000 ft are positive throughout the route (+13 to +16°C). The G-AIRMET freezing level chart places the freezing level at approximately 16,000 ft MSL along this corridor. There is no structural icing risk at 12,500 ft in clear air.

No SLD (Supercooled Large Droplet) signal exists along the route at any level.

Altitude Strategy

• Best band (if route were clear): 10,500–12,500 ft MSL — above most terrain, in the temperature range where icing is not a factor in clear air, and below the convective SIGMET TurbHi band (FL320–FL420).
• Worst band: Any altitude inside active convective cells. The cells are tops above FL420; there is no altitude that clears them. Avoidance is the only strategy.
• Escape option if conditions develop en route: Turn back to KPUB or divert to Alamosa (KALS) — the latter is upwind of the primary convective complex per surface analysis. Do not attempt to press through building convection. Maintain 20+ nm lateral separation from all cells. Coordinate deviations with ATC; do not use cockpit datalink radar to thread between cells.

Getting Into KABQ

Current conditions at KABQ (observed 2052Z): 10 SM visibility, scattered clouds at 9,000 ft, temperature 34°C/dew point 9°C, winds 180°/7 kt, altimeter 30.09. Density altitude approximately 8,599 ft. The METAR remarks note occasional lightning in-cloud and cloud-to-ground to the east and southwest through northwest, with cumulonimbus distant east and southwest through northwest, and showers distant northeast through southeast. VFR at the field currently, but convective activity is surrounding the airport.

TAF group valid at estimated arrival 23:20Z (FM291900 group): winds 240°/10 kt, visibility greater than 6 SM, scattered clouds at 9,000 ft. A PROB30 for TSRA with winds VRB/15G30 kt and broken ceiling at 8,000 ft (CB) runs from 23:00Z to 02:00Z — this window is already open at your estimated 23:20Z arrival. This is a PROB30 (30% probability), not a TEMPO, but combined with surrounding convective activity it is operationally relevant.

The WFO ABQ AFD explicitly calls for scattered thunderstorms affecting terminals with gusty winds exceeding 30 kt and MVFR to IFR visibility from heavy rain as a direct impact possibility. Outflow winds are "favored to bring about gusty conditions this afternoon through the central Rio Grande Valley, mainly between 22Z and 02Z" — your arrival falls squarely in that window. One or two storms are expected to be capable of strong winds and hail in northeast NM.

Runway wind estimate at arrival: The TAF forecasts 240°/10 kt, suggesting a roughly crosswind component on Runway 03/21 and a crosswind on Runway 08/26 (KABQ's longest at 13,793 ft). Actual runway winds at a terrain-influenced airport like KABQ can differ materially from winds aloft; outflow from nearby cells could produce variable gusts well in excess of 30 kt. KABQ has ILS approaches on Runways 03 and 08; verify current approach availability in the Chart Supplement.

Estimated block time: roughly 80 minutes for the 220 nm route. Arrival is estimated at 23:20Z (17:20 MDT).

Practical alternate: Albuquerque's convective environment during 22Z–02Z makes any nearby airport potentially compromised. Consider Santa Fe (KSAF), approximately 50 nm northeast of KABQ and typically on the upwind side of the westerly convective regime — it provides genuine weather separation from KABQ. Verify approach availability and current conditions in the Chart Supplement; do not use a field that is itself under convective impact. Confirm the 14 CFR 91.169 alternate requirement using the current destination TAF and your ETA window.

The direct route penetrates Albuquerque International Airport Class C airspace (shelf floor 6,900 ft, top 9,400 ft) roughly 211–214 nm along the route during descent near the destination. Two-way radio communication with ABQ Approach must be established before entering the Class C. Your actual IFR routing may already account for this; verify on a current sectional chart.

Fly or No

NO-GO at 22:00Z as filed.

Hard Stops

1. Convective SIGMET 69C (valid until 22:55Z): Active at your departure time. Places an area of thunderstorms directly on the route corridor — 30 NE PUB is explicitly named. Tops above FL450. No altitude at or below FL450 clears these cells. Do not depart into an active convective SIGMET area.
2. Convective SIGMET 70C (valid until 22:55Z): Active at your departure time. Thunderstorms nearly stationary from 30 ENE PUB through southern Colorado/northern New Mexico to 40 NNE ALS — the entire first half of the route. Tops to FL420. Direct route conflict.
3. TFR NOTAM 6/9111 (Los Alamos, NM): Active now through August 10 at 03:00Z (~269 hours after ETD). Surface to 14,500 ft MSL, direct route conflict at your planned 12,500 ft cruise altitude. You must verify your routing avoids this TFR laterally or obtain appropriate clearance before departure. This is not a weather stop — it is a regulatory stop.

Why this is not MARGINAL GO: A MARGINAL GO applies when conditions are workable with added caution and a pre-defined trigger. Here, two active Convective SIGMETs with direct route overlap and tops above FL420 mean there is no safe altitude or routing that threads the filed route at departure time. Adding the TFR conflict, this flight cannot depart as filed at 22:00Z.

Watch Items (after hard stops are resolved)

• PROB30 TSRA window at KABQ (23:00Z–02:00Z) — monitor for TAF upgrade to TEMPO before any rescheduled departure.
• SIGMET outlook language explicitly states "WST ISSUANCES EXPD" — new convective SIGMETs are anticipated along the CO/NM corridor overnight. Do not assume the post-22:55Z picture is clear; check updated WSTs.
• Wildfire smoke (~44 nm of route, NOAA HMS, observation 6.9 hours old) — may reduce slant-range visibility even when surface METAR visibility is good; TAFs remain authoritative.
• NOTAM 6/9841 (Cimarron, NM TFR): surface to 11,500 ft, ~11 nm from route. Your planned 12,500 ft cruise is above its ceiling, but verify lateral clearance before any rescheduled flight.

What Changes This Call

• Updated WSTs (post-22:55Z) must explicitly show the KPUB–KABQ corridor clear — both 69C and 70C superseded or cancelled. Do not depart based on expiration alone; new issuances are explicitly expected.
• CWA ZAB-103 must be confirmed expired (scheduled end 22:00Z) and not reissued. Verify with FSS before taxi.
• TFR NOTAM 6/9111 routing conflict must be resolved before any departure — either confirmed clear of your route laterally or with appropriate handling obtained.
• KABQ PROB30 TSRA upgrades to TEMPO: If the 23Z–02Z window becomes a TEMPO group in a revised TAF, strongly reconsider the arrival plan and alternate requirements even after convective SIGMETs clear the en route portion.

If You Go — Do This

Departure timing: The best window tonight will likely be after the convective complex moves or dissipates — check updated surface progs and WSTs. The SIGMET outlook and AFD suggest this is a diurnal pattern; conditions historically improve after 03Z–04Z in this regime, but that is not guaranteed. Do not depart before the corridor is explicitly clear in current convective products.

1. Before engine start: Pull current WSTs from aviationweather.gov, confirm both 69C and 70C have been superseded and the corridor is depicted clear. Confirm CWA ZAB-103 is expired and not reissued. Check TFR NOTAM 6/9111 routing and confirm your filed route is lateral-clear or cleared through. Check tfr.faa.gov and FSS for any new TFR activity.
2. File and fly IFR. The terrain complexity of the southern Rockies, the active convective environment, and the TFR geometry all demand IFR with ATC coverage. Do not attempt this route VFR in current conditions.
3. Altitude: File 12,500 ft (or confirm ATC assignment). Confirm departure and cruise altitudes clear TFR NOTAM 6/9111 (surface to 14,500 ft at Los Alamos). If routing around the TFR requires a lateral offset, confirm that routing with ATC at filing.
4. Fuel: Carry fuel for the 80-minute flight plus KABQ hold, divert to alternate (KSAF or equivalent with weather separation), and reserves. The PROB30 TSRA window at KABQ arrival time means holding or diverting is a realistic scenario, not a contingency.
5. Alternate planning: Identify a suitable alternate with genuine weather separation — Santa Fe (KSAF) is the primary candidate. Verify approach availability and forecast in the Chart Supplement. Confirm the 14 CFR 91.169 alternate requirement using the current destination TAF and your ETA window.
6. En route radar: Use Flight Service or ATC (workload permitting) for updates. Do not use cockpit datalink NEXRAD to navigate between cells — datalink can be 15–20+ minutes older than its displayed age. Maintain a minimum of 20 nm lateral separation from all convective cells. If ATC vectors bring you closer, say no and request an alternate routing.
7. Density altitude at KPUB: ~7,651 ft at departure. Use full-length Runway 08R/26L (10,498 ft) for any performance-limited departure scenario. KPUB has high-volume DA-20 training traffic SR–SS Mon–Fri; be alert for pattern traffic.
8. KABQ Class C: Establish two-way communication with ABQ Approach before entering the Class C shelf (floor 6,900 ft, top 9,400 ft) on descent. Your IFR routing with ATC will handle this; confirm Class C entry coordination is in your clearance.
9. KABQ density altitude at arrival: ~8,599 ft. Plan landing distance accordingly on the long runway.

Confidence

High — for the NO-GO call at 22:00Z as filed.

The NO-GO is driven by deterministic, regulatory-grade products: two active Convective SIGMETs with named geographic anchors directly overlapping the route at departure time, and an active TFR at planned cruise altitude on the direct route. These are not probabilistic concerns — they are current, specific products requiring action before departure.

Confidence in the post-SIGmet picture is Medium. The WFO ABQ AFD and SIGMET outlook language both indicate additional issuances are expected. The diurnal convective cycle for southern Colorado and New Mexico in late July typically produces a late-afternoon/evening peak followed by gradual diminishment after 03Z–04Z, but the overnight evolution depends on storm-scale factors not resolved in the current data. A rescheduled departure later tonight (after 03Z) may be viable — reassess with current WSTs, TAFs, and radar at that time.

What could still change the picture: updated WSTs post-22:55Z showing unexpected rapid convective organization or a persistent nocturnal MCS would push any rescheduled departure to Thursday morning. Conversely, a quick convective decay and clean post-03Z corridor would support a same-night rescheduled departure. Check all products from scratch before any subsequent departure decision.