PACJET Projects
HMT 2004
PACJET 2003
PACJET 2002
PACJET 2001
CALJET 1998
PACJET 2001 IOPs
IOP 1: 20 Jan 2001
IOP 2: 23 Jan 2001
IOP 3: 25 Jan 2001
IOP 4: 31 Jan 2001
IOP 5: 1 Feb 2001
IOP 6: 6 Feb 2001
IOP 7: 9 Feb 2001
IOP 8: 10 Feb 2001
IOP 9: 11 Feb 2001
IOP 10: 12 Feb 2001
IOP 11: 17 Feb 2001
IOP 12: 18 Feb 2001
IOP 13: 21 Feb 2001
IOP 14: 24 Feb 2001
IOP 15: 25 Feb 2001
IOP 16: 1 Mar 2001
Background
About Pacjet
CALJET Summary
Societal Impacts and User Input
Linkages to National Priorities
USWRP
  Data Assimilation Implementation Plan
March 2001 Program Status Report
PACJET 2001 Poster NSSL Briefing
Program Documents
PACJET and a Long-term Effort to Improve 0-24 h West Coast Forecasts
Overview Poster
Research Participants
NOAA Research
  ETL,   NSSL,   FSL,   AL,   CDC
National Weather Service Western Region
  Eureka,   Hanford,   Medford,   Monterey,   Oxnard,   Portland,   Reno,   Sacramento,   San Diego,   Seattle,   CNFRC
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  AOC
Naval Postgradute School
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  CIMSS,   CIRA
Operational Forecasting Components
COMET Presentation
West Coast RUC Aircraft Obs via AWIPS
GWINDEX Poster
Applications Development
Research Components
Modeling Research Components
Related Experiments
Winter Storm Reconnaissance (Central Pac.)
CRPAQS (CA Air Quality)
IMPROVE (Microphysics)
THORPEX (Synoptic Targeting)
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AEROSONDE
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NOAA S-band Radar
Contacts
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Workshops
2001 - Monterey, CA
July 13-14 2000 (Boulder, CO)
July Workshop Agenda
September 1999 - Monterey, CA
1999 Planning Workshop Figures
June 1998 - CALJET
 

Program Status for 11 February 2001: IOP 09

Status | Observations | Forecast Discussion | Flight Plan | Aircraft Status | Soundings Status

Status
Sunday, February 11 Flight in the S. CA area. Take off at 1600 PST.
Monday, February 12 Weather briefing at 0830 PST.
Proposed flight in the S. CA area.
Tuesday, February 13 Hard down day.
Wednesday, February 14 No fly day.

Status | Observations | Forecast Discussion | Flight Plan | Aircraft Status | Soundings Status

Observations
0436 UTC Making drop#10 at pt 8.
At 36degN, 122deg30minW, 465 mb:
winds: 246deg, 39kt
air temp: -34.0degC ,dewpt temp: -54.8degC
0425 UTC Making a drop at
35deg23minN, 121deg53minW, 465mb:
(heading: 304deg at 19500 ft, moving to pt 8)
winds: 247deg, 79kt
air temp: -29.3degC, dewpt temp:-48.7degC
0422 UTC At 35.17N, 121.71W, 500mb:
winds: 250deg, 70kt
air temp: -25.0degC
0407 UTC At 34deg28minN, 121deg7minW, 891 mb:
heading: 325deg at 3500 ft, moving to pt 8.
winds:253deg, 13kt
air temp: 1.9degC ,dewpt temp: 1.5degC
0402 UTC
Weak rainband (max echo 35-40) situated off of San Luis Obispo.
0346 UTC at 33deg30minN, 120deg3minW, 891mb:
heading: 310deg at 3500ft.
winds: 238deg, 16kt
air temp: 4.5degC, dewpt temp: 2.4degC
0314 UTC
A tail radar image of a convective cell (echo max 50 dbz) embedded within the stratiform rainband shown in the 0247 image.
0253 UTC At 33deg59minN, 119deg1minW, 977mb:
winds: 189deg, 25kt
air temp: 9.7degC, dewpt temp: 6.8degC

No blocked flow in Bight, winds in Bight are light (5 kt). Precipitation appears to be stratiform in nature rather than convective.

0247 UTC
0224 UTC at 34deg25minN, 121degW, 979 mb:
heading: 116deg at 1000 ft, going to pt 3
winds: 227deg, 5kt
air temp: 8.3degC, dewpt temp: 5.7degC
0214 UTC at 33deg54minN, 120deg41minW, 978 mb:
heading: 322 deg at 1000ft.
winds: 254deg, 4 kt
air temp: 9.0 degC, dewpt temp: 4.7degC
0200 UTC at 33deg12minN, 120deg4minW, 978mb:
(heading: 322deg at 1000 ft)
winds: 223deg, 21kt
air temp: 9.7degC, dewpt temp: 7.7degC
0154 UTC
0117 UTC at 33deg22minN, 120deg20minW, 484 mb:
(heading to drop#8: 155deg at 19000ft)
winds: 253deg, 61kt
air temp: -22.2degC ,dewpt temp: -33.3degC
0111 UTC At 33deg45minN, 120deg42minW, 484 mb
(heading to drop#7: 155deg at 18900 ft)
winds: 249deg, 64kt
air temp: -22.5degC ,dewpt temp: -32.9degC
0105 UTC at 34deg8minN, 121deg4minW, 484 mb
(heading to drop#6: 156deg at 18800 ft)
winds:246deg, 67kt
air temp: -22.8degC ,dewpt temp: -35.7degC
0059 UTC at 34deg29minN, 121deg,25minW, 484 mb:
(heading to drop#5: 156deg, at 18800ft)
winds:246deg, 72kt
air temp: -23.5degC ,dewpt temp: -34.3degC
0053 UTC at 34deg50minN, 121deg47minW, 484mb:
(heading: 156deg, at 18700ft)
winds: 245deg, 73kt
air temp: -23.3degC, dewpt temp: -42.6degC
0047 UTC at 35deg14minN, 122deg10minW, 484 mb:
(moving to drop#3 at 18500ft, heading:157deg)
winds: 246deg, 77kt
air temp: -25.1degC ,dewpt temp: -39.3degC
0032 UTC at 36degN, 123degW (pt 1), 485 mb:
(moving to drop1 pt ,heading: 153deg , at 18,500 ft)
winds: 258deg, 45kt
air temp: -30.0degC ,dewpt temp: -53.6degC

Status | Observations | Forecast Discussion | Flight Plan | Aircraft Status | Soundings Status |

Forecast Discussion
PACJET IOP 9 Short Term Forecast Discussion
National Weather Service/PACJET Operations Center, Monterey, CA
0430 UTC February 12, 2001

Lightning detection system not reporting but San Luis Obispo reported a thunderstorm.

Strongest convection south of San Francisco Bay area is in a stationary line of showers from 35.5/120 to 33.8/122.7 and passes over San Luis Obispo. Cells are forming in the SE and traveling to the NW with the highest Dbz values in the mid 40s. San Luis Obispo reporting moderate rain with .08 last hour. Tops on the line of showers continue to be low with cloud top temps near the coast -17 to -8C 127 miles off shore.

Rain fall last hour:

     Santa Barbara         .00
     Old Man Mtn           NA
     Gibralter Dam         NA
     Carpinteria           NA
     La Granda Mtn         NA
     Matilija Cr.          NA
     
Goleta previous hour .01 approximately

Ertl

0330 UTC February 12, 2001

No Lightning strikes on detection system.

Band of mid level clouds is beginning to show some breaks in the stratus but continues to progress south with a small band of showers remaining from San Luis Obispo SW. Band shows very little progression with cells in the band slowly moving to the NE.

Main band of showers oriented from NE to SW is east of Santa Barbara and west of Point Mugu. Surface winds behind main band of showers over the Santa Barbara coast generally light with the strongest winds southeast of the main band of showers. Winds at point Mugu south 18G28KT.

Rain fall last hour:

     Santa Barbara         .01
     Old Man Mtn           .00
     Gibralter Dam         .00
     Carpinteria           .00
     La Granda Mtn         .16
     Matilija Cr.          .08

Golita previous hour .03 approximately

Ertl

0230 UTC February 12, 2001

No Lightning strikes on detection system.

00z Goes Winds 700-750mb shows large area of 40kt that corresponds with and parallel to the mid level stratus band that extends from Southwest from a San Luis Obispo to LA line.

Strongest echoes have moved inland and the lower tops are not showing up on radar until they get near the coast. Another line of showers is developing from San Luis Obispo SW cloud tops in the band -16 to -18C.

Rain fall last hour:

     Santa Barbara         .02
     Old Man Mtn           .00
     Gibralter Dam         .00
     Carpinteria           .04
     La Granda Mtn         .20
     Matilija Cr.          .39
Golita previous hour .00

Ertl

0130 UTC February 12, 2001

No Lightning strikes on detection system.

Main band of showers on Radar has moved east of Santa Barbara with several small bands moving east behind it.

Back edge of the mid level stratus deck is about 15 miles Northwest of San Luis Obispo and slowly moving south. Stratus cloud tops within 46 miles of the coast -10 to -15C clouds further from the coast generally -5 to -10C.

Rain fall last hour:

            Santa Barbara  .01
            Old Man Mtn    .00
            Gibralter Dam  .20
            Carpinteria    .20
            La Granda Mtn  .35
           

Ertl

PACJET Short Term Forecast Discussion
National Weather Service/PACJET Operations Center, Monterey, CA
1300 UTC February 1, 2001

Short Term (Sun - Tue)Discussion
Both Eta and Avn are in good agreement through 48 hours, and the model initialization looks excellent. Perhaps a direct result of special soundings/dropsondes related to Pacjet. The cold front along the Central California coast this morning will continue to drop slowly south to southeast. Mainly moderate but persistent precipitation across southern portions of the Santa Lucia Mountains and into the Santa Ynez Range...with scattered showers further north. Precipitation will increase across the LA basin tonight as the Upper Low along the Northern California coast continues its southward movement. Precipitation will be heavy during the day on Monday near the coast of Southern California. Favorable orographic flow will be combined with a layer precipitable water plume with values approaching 1.00 inch. Meso eta shows some significant instability offshore from LA monday evening. Otherwise the front will move south into Mexico with gradually decreasing showers across Southern CA monday night. Ridging offshore will result in northerly flow along the coast with gradual drying on tuesday.

Long Term (Wed-Sun) Discussion
Decent agreement at 72 hrs. but the medium range models diverge from there. Three main mid level features through the period will be an offshore ridge, a trough further west from northern California, and another trough which is expected to move southeast out of British Columbia and across Washington. Placement and movement of these features will make a large difference in future conditions. The Euro model continues to show the least similarity with the other models, and looks the least reasonable with dropping the British Columbia trough almost due south along the pacific northwest coast. So, this time frame does not look overly active. However, the Avn model at about 20N latitude shows a distinct change from easterly to westerly flow. This could be the harbinger of developing a tap of Tropical moisture by next week.

DW

Status | Observations | Forecast Discussion | Flight Plan | Aircraft Status | Soundings Status

Flight Plan

Status | Observations | Forecast Discussion | Flight Plan | Aircraft Status | Soundings Status |

Aircraft Status
Sunday, February 11 Flight in the S. CA area, 1600 PST take off.
Monday, February 12 Proposed flight for the S. CA area.
Tuesday, February 13 Hard down day.
Wednesday, February 14 No fly day.

Status | Observations | Forecast Discussion | Aircraft Status | Soundings Status |

Sounding Status
11 February
Bodega BaySoundings as event develops.
CazaderoSoundings as event develops.
OaklandSpecial 3 hr soundings requested 0Z Sunday to 0Z Monday.
RenoSpecial 3 hr soundings requested 12 Z Sunday to 12 Z Monday.
12 February
Bodega BayNo soundings.
CazaderoNo soundings.
OaklandSpecial 3 hr soundings completed at 0Z Monday.
RenoSpecial 3 hr soundings completed at 12 Z Monday.