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NWP MODELS.</informationSource><eruptionDetails>VA CLD OBS</eruptionDetails><observation><VolcanicAshObservedOrEstimatedConditions gml:id="uuid.2fd7e061-0f28-444f-8e4c-91b32f55eba6" isEstimated="false" status="IDENTIFIABLE"><phenomenonTime><gml:TimeInstant gml:id="uuid.a5f6e132-13fa-410a-8e17-7847ed915412"><gml:timePosition>2025-12-18T14:56:00Z</gml:timePosition></gml:TimeInstant></phenomenonTime><ashCloud><VolcanicAshCloudObservedOrEstimated gml:id="uuid.75b3d2cc-05f0-4781-824d-3037a91b0a56"><ashCloudExtent><aixm:AirspaceVolume gml:id="uuid.96c82844-eacf-4a19-b066-307e0c026dd4"><aixm:upperLimit uom="FL">190</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.8c4ca1b0-f12d-4fe2-9ece-c06a0870af27" srsDimension="2" srsName="http://www.opengis.net/def/crs/EPSG/0/4326"><gml:patches><gml:PolygonPatch><gml:exterior><gml:LinearRing><gml:posList count="5">19.600 -97.767 19.583 -97.850 19.383 -97.867 19.383 -97.733 19.600 -97.767</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]">30</speedOfMotion></VolcanicAshCloudObservedOrEstimated></ashCloud><ashCloud><VolcanicAshCloudObservedOrEstimated gml:id="uuid.8511773b-2d19-4f20-bcba-7bc5ec418684"><ashCloudExtent><aixm:AirspaceVolume gml:id="uuid.ffa1e37b-7765-4176-a5f2-7a469a334bca"><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.b9f819e8-f602-438e-9971-24e9fa8d8df6" srsDimension="2" srsName="http://www.opengis.net/def/crs/EPSG/0/4326"><gml:patches><gml:PolygonPatch><gml:exterior><gml:LinearRing><gml:posList count="5">19.717 -97.783 19.667 -97.884 19.583 -97.867 19.617 -97.733 19.717 -97.783</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]">35</speedOfMotion></VolcanicAshCloudObservedOrEstimated></ashCloud></VolcanicAshObservedOrEstimatedConditions></observation><forecast><VolcanicAshForecastConditions gml:id="uuid.c10697ba-a41c-44d4-9859-9311c8c5a448" status="NO_VOLCANIC_ASH_EXPECTED"><phenomenonTime><gml:TimeInstant gml:id="uuid.5ee40b3c-10ca-47fa-97c5-ddc80acefd0b"><gml:timePosition>2025-12-18T21:00:00Z</gml:timePosition></gml:TimeInstant></phenomenonTime></VolcanicAshForecastConditions></forecast><forecast><VolcanicAshForecastConditions gml:id="uuid.4dce98df-bb18-42b2-a9f4-65f922f0929d" status="NO_VOLCANIC_ASH_EXPECTED"><phenomenonTime><gml:TimeInstant gml:id="uuid.60bd6a5e-e9e2-47ef-b3c3-dfd0d362211d"><gml:timePosition>2025-12-19T03:00:00Z</gml:timePosition></gml:TimeInstant></phenomenonTime></VolcanicAshForecastConditions></forecast><forecast><VolcanicAshForecastConditions gml:id="uuid.5a49ecbf-03c0-4949-86ee-acd0fd62826a" status="NO_VOLCANIC_ASH_EXPECTED"><phenomenonTime><gml:TimeInstant gml:id="uuid.8252b9dd-5b9f-4ace-b85a-3284911e7efa"><gml:timePosition>2025-12-19T09:00:00Z</gml:timePosition></gml:TimeInstant></phenomenonTime></VolcanicAshForecastConditions></forecast><remarks>DENSE VA CLD OBS IN STLT IMG AT APPRX 60NM FM SUMMIT. HGT UPDATED BASED ON MOVMT AND NWP MDLS. NWP MLD GUIDANCE FCSTS GEN NE MOVMT THRU T+6. ...MONAGHAN</remarks><nextAdvisoryTime><gml:TimeInstant gml:id="uuid.af6d6681-c682-4a2d-b991-0133a62653aa"><gml:timePosition indeterminatePosition="before">2025-12-18T21:15:00Z</gml:timePosition></gml:TimeInstant></nextAdvisoryTime></VolcanicAshAdvisory></meteorologicalInformation><bulletinIdentifier>A_LUXX22KNES181513_C_KNES_20251218151449.xml</bulletinIdentifier></MeteorologicalBulletin>