Air carrier first officer reported taking corrective action after the enhanced ground proximity warn...

Narrative:

Departed runway 28 in mmgl (gdl). Non-standard departure on a heading of H260; due to military airspace lockdown to the north of the field. Right above 7;000 ft I received 'terrain; terrain' + ground proximity flashing + terrain map on mfd turned red over a value of 9;800. I set max thrust and kicked the autopilot off. Maintained 200 knots and present heading. Airplane transitioned from a 2;000 ft/min climb to 3;700 ft/min in a matter of a few seconds. Looked outside again to locate the terrain; however no mountain/terrain in-sight. Visibility was hazy due to yellow fog in the region. Heard the egpws warning only once; reacted to it and never received it again. Flight continued normally. Mmgl should try to avoid assigning this heading on departure. Captain requested the published departure on clearance and got denied. Reason was 'military activity' to the north. We believe that departure control was late to turn us to the north; which in a sense got us going west-northwest; probably longer than we should have. The published departure has a great DME arc that keeps you away from this high terrain for a very good reason.

Original NASA ASRS Text

Title: Air carrier First Officer reported taking corrective action after the Enhanced Ground Proximity Warning System was triggered due to a non-standard departure.

Narrative: Departed Runway 28 in MMGL (GDL). Non-Standard Departure on a heading of H260; due to Military Airspace lockdown to the north of the field. Right above 7;000 ft I received 'Terrain; Terrain' + GND PROX flashing + Terrain map on MFD turned red over a value of 9;800. I set Max Thrust and kicked the Autopilot OFF. Maintained 200 knots and present heading. Airplane transitioned from a 2;000 ft/min climb to 3;700 ft/min in a matter of a few seconds. Looked outside again to locate the terrain; however no mountain/terrain in-sight. Visibility was hazy due to yellow fog in the region. Heard the EGPWS warning only once; reacted to it and never received it again. Flight continued normally. MMGL should try to avoid assigning this heading on departure. Captain requested the published departure on clearance and got DENIED. Reason was 'Military Activity' to the north. We believe that Departure Control was late to turn us to the North; which in a sense got us going west-northwest; probably longer than we should have. The published departure has a great DME ARC that keeps you away from this high terrain for a very good reason.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1490151
Time
Date	201710
Local Time Of Day	1201-1800
Place
Locale Reference	MMGL.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT

Air carrier first officer reported taking corrective action after the enhanced ground proximity warning system was triggered due to a non-standard departure.