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<MeteorologicalBulletin gml:id="uuid.a47f7914-519c-46e3-b0f4-ec2ca82b4b27" xmlns="http://def.wmo.int/collect/2014" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://def.wmo.int/collect/2014 http://schemas.wmo.int/collect/1.2/collect.xsd"><meteorologicalInformation><VolcanicAshAdvisory gml:id="uuid.2fe06142-a8db-444a-94a2-4bc4db725e56" permissibleUsage="OPERATIONAL" reportStatus="NORMAL" xmlns="http://icao.int/iwxxm/3.0" xmlns:aixm="http://www.aixm.aero/schema/5.1.1" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://icao.int/iwxxm/3.0 http://schemas.wmo.int/iwxxm/3.0/iwxxm.xsd"><issueTime><gml:TimeInstant gml:id="uuid.334639fb-bc7d-4061-ae25-dd7e3bdb735c"><gml:timePosition>2025-12-21T21:29:00Z</gml:timePosition></gml:TimeInstant></issueTime><issuingVolcanicAshAdvisoryCentre><Unit gml:id="uuid.842c5dea-5a94-451c-af7f-0d2383aaca3f" xmlns="http://www.aixm.aero/schema/5.1.1"><timeSlice><UnitTimeSlice gml:id="uuid.e8ed231c-5474-4af0-ae9a-15be237f239a"><gml:validTime /><interpretation>SNAPSHOT</interpretation><name>WASHINGTON</name><type>OTHER:VAAC</type></UnitTimeSlice></timeSlice></Unit></issuingVolcanicAshAdvisoryCentre><volcano><EruptingVolcano gml:id="uuid.c70d8449-f061-418d-ae35-a9449a9a98f0" xmlns="http://def.wmo.int/metce/2013"><name>POPOCATEPETL 341090</name><position><gml:Point axisLabels="Lat Long" gml:id="uuid.9c447189-db33-416e-ac8c-8521ab4ceb24" srsDimension="2" srsName="http://www.opengis.net/def/crs/EPSG/0/4326"><gml:pos>19.017 -98.617</gml:pos></gml:Point></position><eruptionDate>2025-12-21T21:29:00Z</eruptionDate></EruptingVolcano></volcano><stateOrRegion>MEXICO</stateOrRegion><summitElevation uom="[ft_i]">17693</summitElevation><advisoryNumber>2025/523</advisoryNumber><informationSource>GOES-19. NWP MODELS.</informationSource><eruptionDetails>OCNL VA EMS</eruptionDetails><observation><VolcanicAshObservedOrEstimatedConditions gml:id="uuid.117270a0-0644-4420-9146-dfa74b331ebd" isEstimated="true" status="IDENTIFIABLE"><phenomenonTime><gml:TimeInstant gml:id="uuid.82d21152-e3aa-4567-a455-9e6f1857cdb4"><gml:timePosition>2025-12-21T21:16:00Z</gml:timePosition></gml:TimeInstant></phenomenonTime><ashCloud><VolcanicAshCloudObservedOrEstimated gml:id="uuid.81e15b53-c700-404f-b7a6-a21e68802d0d"><ashCloudExtent><aixm:AirspaceVolume gml:id="uuid.4b3ee9cb-b535-4610-a572-5ef25043f20d"><aixm:upperLimit uom="FL">230</aixm:upperLimit><aixm:upperLimitReference>STD</aixm:upperLimitReference><aixm:lowerLimit>GND</aixm:lowerLimit><aixm:lowerLimitReference>SFC</aixm:lowerLimitReference><aixm:horizontalProjection><aixm:Surface axisLabels="Lat Long" gml:id="uuid.20a1c284-c9a1-4360-966b-28c3e2265030" srsDimension="2" srsName="http://www.opengis.net/def/crs/EPSG/0/4326"><gml:patches><gml:PolygonPatch><gml:exterior><gml:LinearRing><gml:posList count="5">20.217 -98.167 19.000 -98.633 19.000 -98.600 19.984 -97.767 20.217 -98.167</gml:posList></gml:LinearRing></gml:exterior></gml:PolygonPatch></gml:patches></aixm:Surface></aixm:horizontalProjection></aixm:AirspaceVolume></ashCloudExtent><directionOfMotion uom="deg">45</directionOfMotion><speedOfMotion uom="[kn_i]">10</speedOfMotion></VolcanicAshCloudObservedOrEstimated></ashCloud></VolcanicAshObservedOrEstimatedConditions></observation><forecast><VolcanicAshForecastConditions gml:id="uuid.e8bc0340-8f48-4b82-970a-80e35cefda0d" status="PROVIDED"><phenomenonTime><gml:TimeInstant gml:id="uuid.f23e1332-c68b-4219-bcd0-721bcbeea093"><gml:timePosition>2025-12-22T03:30:00Z</gml:timePosition></gml:TimeInstant></phenomenonTime><ashCloud><VolcanicAshCloudForecast gml:id="uuid.6afe8594-4ac5-4c4d-bbbf-42359ee10ac6"><ashCloudExtent><aixm:AirspaceVolume gml:id="uuid.e0bc3091-409d-4706-b97f-df8398421e38"><aixm:upperLimit uom="FL">230</aixm:upperLimit><aixm:upperLimitReference>STD</aixm:upperLimitReference><aixm:lowerLimit>GND</aixm:lowerLimit><aixm:lowerLimitReference>SFC</aixm:lowerLimitReference><aixm:horizontalProjection><aixm:Surface axisLabels="Lat Long" gml:id="uuid.520611b5-f191-41a4-9986-ff9c74a660c0" srsDimension="2" srsName="http://www.opengis.net/def/crs/EPSG/0/4326"><gml:patches><gml:PolygonPatch><gml:exterior><gml:LinearRing><gml:posList count="5">19.934 -98.267 19.000 -98.633 19.000 -98.617 19.767 -97.950 19.934 -98.267</gml:posList></gml:LinearRing></gml:exterior></gml:PolygonPatch></gml:patches></aixm:Surface></aixm:horizontalProjection></aixm:AirspaceVolume></ashCloudExtent></VolcanicAshCloudForecast></ashCloud></VolcanicAshForecastConditions></forecast><forecast><VolcanicAshForecastConditions gml:id="uuid.8843bd42-ecab-4980-b84c-64dc98bb3d65" status="PROVIDED"><phenomenonTime><gml:TimeInstant gml:id="uuid.c619b40f-ad44-4972-8509-2a57fcea7fe6"><gml:timePosition>2025-12-22T09:30:00Z</gml:timePosition></gml:TimeInstant></phenomenonTime><ashCloud><VolcanicAshCloudForecast gml:id="uuid.e0b28239-7a03-4f48-a40d-89823aadf853"><ashCloudExtent><aixm:AirspaceVolume gml:id="uuid.4f3335a4-3086-42f1-a4ae-26942ff0f707"><aixm:upperLimit uom="FL">230</aixm:upperLimit><aixm:upperLimitReference>STD</aixm:upperLimitReference><aixm:lowerLimit>GND</aixm:lowerLimit><aixm:lowerLimitReference>SFC</aixm:lowerLimitReference><aixm:horizontalProjection><aixm:Surface axisLabels="Lat Long" gml:id="uuid.1015adb0-9b2b-431a-86b4-f94932cb0c97" srsDimension="2" srsName="http://www.opengis.net/def/crs/EPSG/0/4326"><gml:patches><gml:PolygonPatch><gml:exterior><gml:LinearRing><gml:posList count="5">19.867 -98.067 19.017 -98.617 19.000 -98.617 19.617 -97.800 19.867 -98.067</gml:posList></gml:LinearRing></gml:exterior></gml:PolygonPatch></gml:patches></aixm:Surface></aixm:horizontalProjection></aixm:AirspaceVolume></ashCloudExtent></VolcanicAshCloudForecast></ashCloud></VolcanicAshForecastConditions></forecast><forecast><VolcanicAshForecastConditions gml:id="uuid.b32811d8-a06a-40cf-a574-f52c0d2d62a7" status="PROVIDED"><phenomenonTime><gml:TimeInstant gml:id="uuid.45510e70-31b9-4a29-b40b-c26ae064d9ce"><gml:timePosition>2025-12-22T15:30:00Z</gml:timePosition></gml:TimeInstant></phenomenonTime><ashCloud><VolcanicAshCloudForecast gml:id="uuid.8834ee2e-a1db-41bf-a87b-e7046ce3b531"><ashCloudExtent><aixm:AirspaceVolume gml:id="uuid.056796f5-1cd0-4192-b2ef-bf850f794061"><aixm:upperLimit uom="FL">230</aixm:upperLimit><aixm:upperLimitReference>STD</aixm:upperLimitReference><aixm:lowerLimit>GND</aixm:lowerLimit><aixm:lowerLimitReference>SFC</aixm:lowerLimitReference><aixm:horizontalProjection><aixm:Surface axisLabels="Lat Long" gml:id="uuid.6a1b2617-4492-4692-bb69-3b201f729bd0" srsDimension="2" srsName="http://www.opengis.net/def/crs/EPSG/0/4326"><gml:patches><gml:PolygonPatch><gml:exterior><gml:LinearRing><gml:posList count="5">19.900 -98.200 19.017 -98.617 19.000 -98.617 19.700 -97.884 19.900 -98.200</gml:posList></gml:LinearRing></gml:exterior></gml:PolygonPatch></gml:patches></aixm:Surface></aixm:horizontalProjection></aixm:AirspaceVolume></ashCloudExtent></VolcanicAshCloudForecast></ashCloud></VolcanicAshForecastConditions></forecast><remarks>NO NEW VA EMS OBS IN STLT IMG. VA EMS LIKELY CONT BASED ON PREV ACTIVITY. NE MVMT EXP THRU T+18. FCST BASED ON MDL GUIDANCE. ...GATLING</remarks><nextAdvisoryTime><gml:TimeInstant gml:id="uuid.ff58f9d0-9c18-44bd-b82e-442e06892772"><gml:timePosition indeterminatePosition="before">2025-12-22T03:30:00Z</gml:timePosition></gml:TimeInstant></nextAdvisoryTime></VolcanicAshAdvisory></meteorologicalInformation><bulletinIdentifier>A_LUXX25KNES212129_C_KNES_20251221212947.xml</bulletinIdentifier></MeteorologicalBulletin>