|Jan 25 1500 PST
Intensive Operation Period (IOP) 3 completed.
Next update 1500 PST 26 January 2001.
|Jan 25 1410 PST
Aircraft Observation: 36.9N 123.5W at 850mb, Temp=3.1 C, winds 54kt 251deg, mixing ratio = 5.5g/kg, theta E = 305K.
|Jan 25 1350 PST
||Aircraft heading 224deg, riding along ncfr
trying to find weakness to punch thru.|
NCFR echo intensities 50dbz at 37deg18minN 123deg19min
Echo top at ~6km, winds at 2150UTC (on "cold" side) 22kt 295deg at 976mb
Will punch thru ncfr and head SE to MRY by 2:30pm.
|Jan 25 1320 PST
Currently sampling near coast at 38deg49minN 123deg49minW plan on
trackingSE toward MRY at 3000ft just before end of mission.
At 38deg46minN 123deg46minW AT 976mb... winds 7kt, 178deg
Expect to return to MRY around 1430 PST.
|Jan 25 1250 PST
At 36.5 N 124.75 W there is a discontinuity in NCFR , 40-80 km
broad of moderate precip, with 35-45 dBZ echos, which weakens
at 36.5 N 125 W then intensifies south of that location.
|Jan 25 1223 PST
We have been riding SW and NE along the NFCR
currently we are on "cold" side at 37deg11minN 124deg23minW
conditions winds 45kt 282deg at 948mb
Tail radar out now, have LF radar only.
|Jan 25 1150 PST
NCFR Update at 1950UTC at 36.8degN 124.8degW
45 dbz echo max, 6-7km echo top
NCFR loses definition for 40km from 36.5degN 124.75degW
to 36.5N 125degW
LLJ info: 45kt 236deg 6.0 g/kg thetE 306K
rainband orient NE-SW
|Jan 25 1120 PST
Narrow cold frontal rainband (NCFR) echo exceeds 55dbz, |
echo top greater than 10km
NCFR echos exceeding 55dbz all along NCFR, NOT isolated.
Phase speed estimate 20 kts heading toward SE.
Low level Jet: Winds 60-65kt 210deg, mixing ratio 6.5 g/kg, theta e 304K
Rainband info: NE-SW orientation, straightens out after
extends beyond LF radar range (at leat 70km SW)
|Jan 25 0810 PST
NCFR summary: 38.4degN 125.5degW, echo tops 10km, reflectvity 50-55dbz
orientation NE-SW curving more SW
NCFR freezing level info:
cold side 5500 ft
warm side 6700 ft
winds on cold side: 50kt 260deg
LLJ summary: 55 kt 200 deg 7.2 g/kg
|Jan 25 0813 PST
Waterspout at 1613 UTC 38.5N 125.4W
Front at 16:15UTC at 38deg32min 125deg 12min W
Winds were 192deg 52kt at 978 mb at 1615 UTC at above position
What we were calling ncfr appears to be cold front
Currently heading south 177deg at 977 mb winds 51kt, 194deg at 38.2' N 125.1' W
|Jan 25 7:59 PST
Air is much less turbulent as we continue
to track 288deg away from ncfr.
|Jan 25 0756 PST
Winds at 875 mb 254deg 48 kts at 15:56 UTC.
Max winds at 875mb were 60kt east of ncfr.
|Jan 25 0753 PST
Penetrated NCFR (Narrow Cold Frontal Rainband) at 38 .25 N 125.5 W
oriented 20 deg-200deg at 15:53 UTC max reflectivity 40-45dBZ.
|Jan 25 0720 PST
||Warm sector at 125' W 38' N contains weak showers. Strong NCR at 38.5' N 127.5' W
oriented NE through SW. Low level jet 48 kts at 190'. Mixing ratio 7 g/kg,
theta e 303 deg K.
|Jan 25 0630 (PST)
NOAA P-3 take-off at 6:15 PST. The primary focus of this flight will be microphysical
process studies in the Cazadero and Bodega Bay Area.