Alert archive / Arizona / Winter Storm Warnings in 2018
Winter Storm Warning 2, NWS Tucson, AZ
NWS Tucson, AZ issued this winter storm warning at Dec 30, 2018, 2:03 PM MST for 5 counties in Arizona. It took effect at Dec 31, 2018, 2:00 PM MST. It was in force for 24 hr. 14 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 30, 2018, 2:03 PM MST (21:03 UTC)
- In effect from
- Dec 31, 2018, 2:00 PM MST
- Expired
- Jan 1, 2019, 1:30 PM MST
- In force
- 24 hr
- Issued by
- NWS Tucson, AZ
Counties Cochise County, AZ, Graham County, AZ, Greenlee County, AZ, Pima County, AZ, Pinal County, AZ
The radar
The Tucson radar (KEMX), 82 km from the middle of the area, began a volume at 21:03 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 1, 3:20 AM MST | SNOW 1 | 3 Nne Green Valley, AZ | 1 INCH OF SNOW ON THE GROUND IN GREEN VALLEY. |
| Jan 1, 6:55 AM MST | SNOW 0.6 | 10 Ssw Tucson, AZ | SPOTTER MEASURED 0.6 INCHES OF SNOW . |
| Jan 1, 7:00 AM MST | SNOW 0.4 | Tucson International Ai, AZ | ESTIMATE ATTRIBUTED TO NEARBY SPOTTER REPORT AND PICTURE EVIDENCE. |
| Jan 1, 7:55 AM MST | SNOW 1 | 9 E Tucson, AZ | |
| Jan 1, 8:02 AM MST | SNOW 11 | Summerhaven, AZ | |
| Jan 1, 8:04 AM MST | SNOW 2.5 | 19 Ene Mammoth, AZ | |
| Jan 1, 8:18 AM MST | SNOW 10.7 | Summerhaven, AZ | |
| Jan 1, 8:19 AM MST | SNOW 5.5 | Oracle, AZ | |
| Jan 1, 8:54 AM MST | SNOW 1.5 | 8 W Benson, AZ | |
| Jan 1, 8:55 AM MST | SNOW 1 | Willcox, AZ | |
| Jan 1, 8:56 AM MST | SNOW 2 | 8 Nne Green Valley, AZ | REPORT FROM SAHUARITA. |
| Jan 1, 9:02 AM MST | SNOW 1 | 4 Nne Catalina, AZ | 1 INCH IN SADDLEBROOKE AT 3400 FEET. |
| Jan 1, 9:21 AM MST | SNOW 1 | 14 Ne Saint David, AZ | |
| Jan 1, 10:00 AM MST | SNOW 1.7 | 15 Se Tucson, AZ | REPORT FROM VAIL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tuscon, AZ (KDMA), launched 12:00Z, 9.1 hours before the alert went out and 67 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1621 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- -48 m²/s²
- 0-3 km storm-relative helicity
- -45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
421 WWUS45 KTWC 302103 WSWTWC URGENT - WINTER WEATHER MESSAGE National Weather Service Tucson AZ 203 PM MST Sun Dec 30 2018 AZZ510-511-514-311200- /O.NEW.KTWC.WS.W.0002.181231T2100Z-190102T0000Z/ White Mountains of Graham and Greenlee Counties- Galiuro and Pinaleno Mountains-Catalina and Rincon Mountains- Including the cities of Hannagan Meadow, Mount Graham, Mount Lemmon, and Summerhaven 203 PM MST Sun Dec 30 2018 ...WINTER STORM WARNING IN EFFECT FROM 2 PM MONDAY TO 5 PM MST TUESDAY... * WHAT...Heavy snow expected. Plan on difficult travel conditions. Total snow accumulations of 10 to 18 inches above 7000 feet with lower amounts between 5000 and 7000 feet. * WHERE...White Mountains of Graham and Greenlee Counties, Galiuro and Pinaleno Mountains and Catalina and Rincon Mountains. * WHEN...2 PM Monday to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ503-506>509-512-513-515-311200- /O.NEW.KTWC.WW.Y.0008.190101T0000Z-190102T0000Z/ Upper Santa Cruz River Valley/Altar Valley-Southeast Pinal County- Upper San Pedro River Valley- Eastern Cochise County below 5000 feet-Upper Gila River Valley- Chiricahua Mountains- Dragoon and Mule and Huachuca and Santa Rita Mountains- Baboquivari Mountains- Including the cities of Oracle, Sierra Vista, Willcox, Chiricahua NM, Bisbee, and Canelo Hills 203 PM MST Sun Dec 30 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM MONDAY TO 5 PM MST TUESDAY ABOVE 4000 FEET... * WHAT...Mountain snow and valley rain changing to snow Monday night into early Tuesday morning before tapering off from west to east on Tuesday afternoon. Plan on slippery road conditions. Total snow accumulations of 1 to 2 inches possible on some valley floors between 4000 and 5000 feet, 2 to 6 inches between 5000 and 7000 feet and 5 to 10 inches in the mountains above 7000 feet. * WHERE...Portions of Southeast Arizona. * WHEN...5 PM Monday to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
8 follow-up statements
163 WWUS45 KTWC 311024 WSWTWC URGENT - WINTER WEATHER MESSAGE National Weather Service Tucson AZ 324 AM MST Mon Dec 31 2018 AZZ510-511-514-311830- /O.CON.KTWC.WS.W.0002.181231T2100Z-190102T0000Z/ White Mountains of Graham and Greenlee Counties- Galiuro and Pinaleno Mountains-Catalina and Rincon Mountains- Including the cities of Hannagan Meadow, Mount Graham, Mount Lemmon, and Summerhaven 324 AM MST Mon Dec 31 2018 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 5 PM MST TUESDAY... * WHAT...Heavy snow expected. Plan on difficult travel conditions. Total snow accumulations of 10 to 18 inches, with locally higher amounts for Mount Graham and the White Mountains. * WHERE...White Mountains of Graham and Greenlee Counties, Galiuro and Pinaleno Mountains and Catalina and Rincon Mountains. * WHEN...2 PM today to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ504-311830- /O.EXA.KTWC.WW.Y.0008.190101T0000Z-190102T0000Z/ Tucson Metro Area- 324 AM MST Mon Dec 31 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST TUESDAY ABOVE 3500 FEET... * WHAT...Snow expected. Plan on slippery road conditions. Total snow accumulations of up to one inch with locally higher amounts possible. A dusting to one half inch is possible to around 3000 feet, which includes some of the higher foothills. * WHERE...The areas of Vail, Corona De Tucson, and Saguaro National Park. * WHEN...5 PM today to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ503-506>509-512-513-515-311830- /O.CON.KTWC.WW.Y.0008.190101T0000Z-190102T0000Z/ Upper Santa Cruz River Valley/Altar Valley-Southeast Pinal County- Upper San Pedro River Valley- Eastern Cochise County below 5000 feet-Upper Gila River Valley- Chiricahua Mountains- Dragoon and Mule and Huachuca and Santa Rita Mountains- Baboquivari Mountains- Including the cities of Oracle, Sierra Vista, Willcox, Clifton, Chiricahua NM, Bisbee, and Canelo Hills 324 AM MST Mon Dec 31 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST TUESDAY ABOVE 4000 FEET... * WHAT...Mountain snow and valley rain changing to snow Monday night into early Tuesday morning before tapering off from west to east on Tuesday afternoon. Plan on slippery road conditions. Total snow accumulations of 1 to 2 inches possible on some valley floors between 4000 and 5000 feet, 2 to 6 inches between 5000 and 7000 feet and 5 to 10 inches in the mountains above 7000 feet. A dusting to one half inch is possible down to 3000 feet. * WHERE...Portions of Southeast Arizona. * WHEN...5 PM today to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
436 WWUS45 KTWC 311221 CCA WSWTWC URGENT - WINTER WEATHER MESSAGE...CORRECTED National Weather Service Tucson AZ 521 AM MST Mon Dec 31 2018 AZZ510-511-514-311830- /O.CON.KTWC.WS.W.0002.181231T2100Z-190102T0000Z/ White Mountains of Graham and Greenlee Counties- Galiuro and Pinaleno Mountains-Catalina and Rincon Mountains- Including the cities of Hannagan Meadow, Mount Graham, Mount Lemmon, and Summerhaven 521 AM MST Mon Dec 31 2018 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 5 PM MST TUESDAY... * WHAT...Heavy snow expected. Plan on difficult travel conditions. Total snow accumulations of 10 to 18 inches, with locally higher amounts for Mount Graham and the White Mountains. * WHERE...White Mountains of Graham and Greenlee Counties, Galiuro and Pinaleno Mountains and Catalina and Rincon Mountains. * WHEN...2 PM today to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ504-311830- /O.EXA.KTWC.WW.Y.0008.190101T0000Z-190102T0000Z/ Tucson Metro Area- 521 AM MST Mon Dec 31 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST TUESDAY ABOVE 3500 FEET... * WHAT...Snow expected. Plan on slippery road conditions. Total snow accumulations of up to one inch with locally higher amounts possible. A dusting to one half inch is possible to around 3000 feet, which includes some of the higher foothills. * WHERE...The areas of Vail, Corona De Tucson, and Saguaro National Park. * WHEN...5 PM today to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ503-506>509-512-513-515-311830- /O.COR.KTWC.WW.Y.0008.190101T0000Z-190102T0000Z/ Upper Santa Cruz River Valley/Altar Valley-Southeast Pinal County- Upper San Pedro River Valley- Eastern Cochise County below 5000 feet-Upper Gila River Valley- Chiricahua Mountains- Dragoon and Mule and Huachuca and Santa Rita Mountains- Baboquivari Mountains- Including the cities of Oracle, Sierra Vista, Willcox, Clifton, Chiricahua NM, Bisbee, and Canelo Hills 521 AM MST Mon Dec 31 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST TUESDAY ABOVE 3500 FEET NORTH OF INTERSTATE 10 AND ABOVE 4000 FEET SOUTH OF THE INTERSTATE... * WHAT...Mountain snow and valley rain changing to snow Monday night into early Tuesday morning before tapering off from west to east on Tuesday afternoon. Plan on slippery road conditions. Total snow accumulations of 1 to 2 inches possible on some valley floors between 4000 and 5000 feet, 2 to 6 inches between 5000 and 7000 feet and 5 to 10 inches in the mountains above 7000 feet. A dusting to one half inch is possible down to 3000 feet. * WHERE...Portions of Southeast Arizona. * WHEN...5 PM today to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
136 WWUS45 KTWC 311828 WSWTWC URGENT - WINTER WEATHER MESSAGE National Weather Service Tucson AZ 1128 AM MST Mon Dec 31 2018 AZZ510-511-514-010100- /O.CON.KTWC.WS.W.0002.181231T2100Z-190102T0000Z/ White Mountains of Graham and Greenlee Counties- Galiuro and Pinaleno Mountains-Catalina and Rincon Mountains- Including the cities of Hannagan Meadow, Mount Graham, Mount Lemmon, and Summerhaven 1128 AM MST Mon Dec 31 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST TUESDAY... * WHAT...Heavy snow expected. Plan on difficult travel conditions. Total snow accumulations of 7 to 10 inches, with localized amounts up to 21 inches, are expected. * WHERE...White Mountains of Graham and Greenlee Counties, Galiuro and Pinaleno Mountains and Catalina and Rincon Mountains. * WHEN...2 PM today to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ503-504-506>509-512-513-515-010100- /O.CON.KTWC.WW.Y.0008.190101T0000Z-190102T0000Z/ Upper Santa Cruz River Valley/Altar Valley-Tucson Metro Area- Southeast Pinal County-Upper San Pedro River Valley- Eastern Cochise County below 5000 feet-Upper Gila River Valley- Chiricahua Mountains- Dragoon and Mule and Huachuca and Santa Rita Mountains- Baboquivari Mountains- Including the cities of Oracle, Sierra Vista, Willcox, Clifton, Chiricahua NM, Bisbee, and Canelo Hills 1128 AM MST Mon Dec 31 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST TUESDAY... * WHAT...Snow expected. Plan on slippery road conditions. Total snow accumulations of 1 to 3 inches, with localized amounts up to 12 inches above 5000 feet, are expected. * WHERE...Portions of Southeast Arizona. For the Tucson metro area snow accumulation up to one inch is currently forecast to occur in the foothills and around Vail and Corona de Tucson. * WHEN...5 PM today to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
832 WWUS45 KTWC 312133 WSWTWC URGENT - WINTER WEATHER MESSAGE National Weather Service Tucson AZ 233 PM MST Mon Dec 31 2018 AZZ510-511-514-011115- /O.CON.KTWC.WS.W.0002.000000T0000Z-190102T0000Z/ White Mountains of Graham and Greenlee Counties- Galiuro and Pinaleno Mountains-Catalina and Rincon Mountains- Including the cities of Hannagan Meadow, Mount Graham, Mount Lemmon, and Summerhaven 233 PM MST Mon Dec 31 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST TUESDAY... * WHAT...Heavy snow will be increasing this evening. Travel will be very difficult to impossible, including during the evening commute. Additional snow accumulations of 9 to 13 inches, with localized amounts up to 20 inches, are expected. * WHERE...White Mountains of Graham and Greenlee Counties, Galiuro and Pinaleno Mountains and Catalina and Rincon Mountains. * WHEN...Until 5 PM Tuesday. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ504-011115- /O.EXT.KTWC.WW.Y.0008.190101T1000Z-190101T1700Z/ Tucson Metro Area- Including the cities of Tucson, Green Valley, and Vail 233 PM MST Mon Dec 31 2018 ...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 3 AM TO 10 AM MST TUESDAY... * WHAT...Rain becoming mixed or turning to snow after midnight so plan on slippery road conditions. Portions of the foothills and grassy areas in the city of Tucson may see snow accumulations possibly up to two inches. However not all of the metro area will see accumulating snow. * WHERE...Tucson Metro Area. * WHEN...3 AM to 10 AM Tuesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ503-506>509-512-513-515-011115- /O.CON.KTWC.WW.Y.0008.190101T0000Z-190102T0000Z/ Upper Santa Cruz River Valley/Altar Valley-Southeast Pinal County- Upper San Pedro River Valley- Eastern Cochise County below 5000 feet-Upper Gila River Valley- Chiricahua Mountains- Dragoon and Mule and Huachuca and Santa Rita Mountains- Baboquivari Mountains- Including the cities of Oracle, Sierra Vista, Willcox, Clifton, Chiricahua NM, Bisbee, and Canelo Hills 233 PM MST Mon Dec 31 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST TUESDAY... * WHAT...Rain will be turning to snow tonight. Plan on slippery road conditions. Total snow accumulations of 1 to 3 inches at the lower elevations, with amounts up to 12 inches in the mountains above 7000 feet, are expected. * WHERE...Portions of Southeast Arizona. * WHEN...5 PM today to 5 PM Tuesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
823 WWUS45 KTWC 011100 WSWTWC URGENT - WINTER WEATHER MESSAGE National Weather Service Tucson AZ 400 AM MST Tue Jan 1 2019 AZZ510-511-514-012300- /O.CON.KTWC.WS.W.0002.000000T0000Z-190102T0000Z/ White Mountains of Graham and Greenlee Counties- Galiuro and Pinaleno Mountains-Catalina and Rincon Mountains- Including the cities of Hannagan Meadow, Mount Graham, Mount Lemmon, and Summerhaven 400 AM MST Tue Jan 1 2019 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Heavy snow is occurring and will continue through early afternoon before tapering off. Plan on difficult travel conditions. Additional snow accumulations of 5 to 10 inches are expected with the bulk of that occurring before noon. * WHERE...White Mountains of Graham and Greenlee Counties, Galiuro and Pinaleno Mountains and Catalina and Rincon Mountains. * WHEN...Until 5 PM today. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ508-509-512-012300- /O.EXT.KTWC.WW.Y.0008.000000T0000Z-190103T0000Z/ Eastern Cochise County below 5000 feet-Upper Gila River Valley- Chiricahua Mountains- Including the cities of Willcox, Clifton, and Chiricahua NM 400 AM MST Tue Jan 1 2019 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM MST WEDNESDAY... * WHAT...Periods of snow will develop later this morning across the area and after a bit of a lull early tonight will continue off and on through mid day Wednesday. Plan on slippery road conditions at times through Wednesday afternoon. Total snow accumulations of 1 to 3 inches, with localized amounts up to 5 inches, are expected in the valleys with 4 to 9 inches in the Chiricahua Mountains. * WHERE...Eastern Cochise County below 5000 feet, Upper Gila River Valley and Chiricahua Mountains. * WHEN...Until 5 PM Wednesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ503-506-507-513-515-012300- /O.CON.KTWC.WW.Y.0008.000000T0000Z-190102T0000Z/ Upper Santa Cruz River Valley/Altar Valley-Southeast Pinal County- Upper San Pedro River Valley- Dragoon and Mule and Huachuca and Santa Rita Mountains- Baboquivari Mountains- Including the cities of Oracle, Sierra Vista, Bisbee, and Canelo Hills 400 AM MST Tue Jan 1 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow is occurring across much of the area and continues to progress eastward into Cochise county. Plan on slippery road conditions through the day. Snow accumulations of 1 to 3 inches, with localized amounts up to 5 inches, are expected. * WHERE...Upper Santa Cruz River Valley/Altar Valley, Southeast Pinal County, Upper San Pedro River Valley, Dragoon and Mule and Huachuca and Santa Rita Mountains and Baboquivari Mountains. * WHEN...Until 5 PM today. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ504-011700- /O.CON.KTWC.WW.Y.0008.000000T0000Z-190101T1700Z/ Tucson Metro Area- Including the cities of Tucson, Green Valley, and Vail 400 AM MST Tue Jan 1 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST THIS MORNING... * WHAT...Snow is now occurring and will continue into the mid-morning hours. Plan on slippery road conditions. Snow accumulations of up to 3 inches are expected in the foothills with an inch or two possible in the city of Tucson, mainly on grassy areas. * WHERE...Tucson Metro Area. * WHEN...Until 10 AM today. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
725 WWUS45 KTWC 011709 WSWTWC URGENT - WINTER WEATHER MESSAGE National Weather Service Tucson AZ 1009 AM MST Tue Jan 1 2019 AZZ504-011815- /O.EXP.KTWC.WW.Y.0008.000000T0000Z-190101T1700Z/ Tucson Metro Area- Including the cities of Tucson, Green Valley, and Vail 1009 AM MST Tue Jan 1 2019 ...WINTER WEATHER ADVISORY HAS EXPIRED... Snow has ended across the area and thus the Winter Weather Advisory has been allowed to expire. $$ AZZ510-511-514-020000- /O.CON.KTWC.WS.W.0002.000000T0000Z-190102T0000Z/ White Mountains of Graham and Greenlee Counties- Galiuro and Pinaleno Mountains-Catalina and Rincon Mountains- Including the cities of Hannagan Meadow, Mount Graham, Mount Lemmon, and Summerhaven 1009 AM MST Tue Jan 1 2019 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Heavy snow occurring. Plan on difficult travel conditions. Additional snow accumulations of 1 to 3 inches are expected. * WHERE...White Mountains of Graham and Greenlee Counties, Galiuro and Pinaleno Mountains and Catalina and Rincon Mountains. * WHEN...Until 5 PM today. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ503-506-507-513-515-020000- /O.CON.KTWC.WW.Y.0008.000000T0000Z-190102T0000Z/ Upper Santa Cruz River Valley/Altar Valley-Southeast Pinal County- Upper San Pedro River Valley- Dragoon and Mule and Huachuca and Santa Rita Mountains- Baboquivari Mountains- Including the cities of Oracle, Sierra Vista, Bisbee, and Canelo Hills 1009 AM MST Tue Jan 1 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow occurring. Plan on slippery road conditions. Additional snow accumulations of up to two inches are expected. * WHERE...Upper Santa Cruz River Valley/Altar Valley, Southeast Pinal County, Upper San Pedro River Valley, Dragoon and Mule and Huachuca and Santa Rita Mountains and Baboquivari Mountains. * WHEN...Until 5 PM today. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ508-509-512-020000- /O.CON.KTWC.WW.Y.0008.000000T0000Z-190103T0000Z/ Eastern Cochise County below 5000 feet-Upper Gila River Valley- Chiricahua Mountains- Including the cities of Willcox, Clifton, and Chiricahua NM 1009 AM MST Tue Jan 1 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY... * WHAT...Snow occurring. Plan on slippery road conditions. Additional snow accumulations of 2 to 4 inches, with localized amounts up to 9 inches, are expected. * WHERE...Eastern Cochise County below 5000 feet, Upper Gila River Valley and Chiricahua Mountains. * WHEN...Until 5 PM Wednesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
557 WWUS45 KTWC 011730 WSWTWC URGENT - WINTER WEATHER MESSAGE National Weather Service Tucson AZ 1030 AM MST Tue Jan 1 2019 AZZ514-011830- /O.CAN.KTWC.WS.W.0002.000000T0000Z-190102T0000Z/ Catalina and Rincon Mountains- 1030 AM MST Tue Jan 1 2019 ...WINTER STORM WARNING IS CANCELLED... The bulk of any significant snow has ended across the Catalina and Rincon Mountains. Expect little if any additional snow accumulations the rest of today. $$ AZZ508-509-512-020000- /O.CAN.KTWC.WW.Y.0008.000000T0000Z-190103T0000Z/ /O.NEW.KTWC.WW.Y.0001.190102T0000Z-190103T0000Z/ Eastern Cochise County below 5000 feet-Upper Gila River Valley- Chiricahua Mountains- Including the cities of Willcox and Clifton 1030 AM MST Tue Jan 1 2019 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST WEDNESDAY... * WHAT...Snow expected. Plan on slippery road conditions, including during the morning commute on Wednesday. Total snow accumulations of up to 2 inches, with localized amounts up to 5 inches, are expected. * WHERE...Eastern Cochise County below 5000 feet, Upper Gila River Valley and Chiricahua Mountains. * WHEN...5 PM today to 5 PM Wednesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ503-506-507-513-515-011830- /O.CAN.KTWC.WW.Y.0008.000000T0000Z-190102T0000Z/ Upper Santa Cruz River Valley/Altar Valley-Southeast Pinal County- Upper San Pedro River Valley- Dragoon and Mule and Huachuca and Santa Rita Mountains- Baboquivari Mountains- 1030 AM MST Tue Jan 1 2019 ...WINTER WEATHER ADVISORY IS CANCELLED... The bulk of any significant snow has ended across the area. Expect little if any additional snow accumulations the rest of today. $$ AZZ510-511-020000- /O.CON.KTWC.WS.W.0002.000000T0000Z-190102T0000Z/ White Mountains of Graham and Greenlee Counties- Galiuro and Pinaleno Mountains- Including the cities of Hannagan Meadow and Mount Graham 1030 AM MST Tue Jan 1 2019 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Heavy snow occurring. Plan on difficult travel conditions. Additional snow accumulations of 1 to 3 inches are expected. * WHERE...White Mountains of Graham and Greenlee Counties and Galiuro and Pinaleno Mountains. * WHEN...Until 5 PM today. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Stay tuned to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
698 WWUS45 KTWC 012030 WSWTWC URGENT - WINTER WEATHER MESSAGE National Weather Service Tucson AZ 130 PM MST Tue Jan 1 2019 AZZ510-511-012130- /O.CAN.KTWC.WS.W.0002.000000T0000Z-190102T0000Z/ White Mountains of Graham and Greenlee Counties- Galiuro and Pinaleno Mountains- 130 PM MST Tue Jan 1 2019 ...WINTER STORM WARNING IS CANCELLED... The Winter Storm Warning that was previously in effect has been cancelled. $$ AZZ508-509-512-021200- /O.UPG.KTWC.WW.Y.0001.190102T0000Z-190103T0000Z/ /O.NEW.KTWC.WS.W.0001.190102T0800Z-190103T0000Z/ Eastern Cochise County below 5000 feet-Upper Gila River Valley- Chiricahua Mountains- Including the cities of Willcox, Clifton, Safford, and Chiricahua NM 130 PM MST Tue Jan 1 2019 ...WINTER STORM WARNING IN EFFECT FROM 1 AM TO 5 PM MST WEDNESDAY... * WHAT...Heavy snow expected. Plan on difficult travel conditions, including during the morning commute on Wednesday. Total snow accumulations of 3 to 6 inches on the valley floors, with 6 to 8 inches above 5000 feet, are expected. Locally higher amounts should occur on the eastern slopes of the Chiricahua Mountains. * WHERE...Eastern Cochise County below 5000 feet, Upper Gila River Valley, and Chiricahua Mountains. * WHEN...1 AM to 5 PM Wednesday. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Listen to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ507-513-021200- /O.NEW.KTWC.WS.W.0001.190102T0800Z-190103T0000Z/ Upper San Pedro River Valley- Dragoon and Mule and Huachuca and Santa Rita Mountains- Including the cities of Sierra Vista, Benson, Bisbee, and Canelo Hills 130 PM MST Tue Jan 1 2019 ...WINTER STORM WARNING IN EFFECT FROM 1 AM TO 5 PM MST WEDNESDAY... * WHAT...Heavy snow expected. Plan on difficult travel conditions, including during the morning commute on Wednesday. Total snow accumulations of 3 to 6 inches on the valley floors, with 6 to 8 inches above 5000 feet, are expected. * WHERE...Upper San Pedro River Valley, and the Dragoon, Mule, Huachuca, and Santa Rita Mountains. * WHEN...1 AM to 5 PM Wednesday. * ADDITIONAL DETAILS...Look for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means heavy snow accumulations are expected. Gusty winds and blowing snow are also possible. This will make travel very difficult or impossible...especially in the mountains. Listen to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ AZZ503-504-514-021200- /O.NEW.KTWC.WW.Y.0002.190102T0800Z-190102T1600Z/ Upper Santa Cruz River Valley/Altar Valley-Tucson Metro Area- Catalina and Rincon Mountains- Including the cities of Nogales, Tucson, Green Valley, Vail, Mount Lemmon, and Summerhaven 130 PM MST Tue Jan 1 2019 ...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 9 AM MST WEDNESDAY... * WHAT...Snow expected. Plan on slippery road conditions, including during the morning commute on Wednesday. Total snow accumulations of 1 to 2 inches on the valley floors (and especially favoring the eastern and southern portion of the Tucson metro area and eastern Santa Cruz County), and 3 to 5 inches above 5000 feet, are expected. * WHERE...Upper Santa Cruz River Valley/Altar Valley, Tucson Metro Area and Catalina and Rincon Mountains. * WHEN...1 AM to 9 AM Wednesday. * ADDITIONAL DETAILS...Look for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow are likely which will cause travel difficulties. Be prepared for slippery roads and limited visibilities...and use caution while driving. Listen to NOAA Weather Radio...commercial television or radio stations...or your cable television service provider for updates on this Winter Storm. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
Nearby
Winter Storm Warnings in Arizona, 2018Every winter storm warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.