Debris Flow-2006/2007 Event Log

IOP-8

Lat: 34.660301 N         Lon: -118.764008 W        Alt: 814 m       Truck HD: 91 deg

Date/Time SR1 ready for operation: 19 March 2007 719 UTC

 

Note taker: Kevin Manross (NSSL)

 

Time (UTC)

Event

 

NOTE :: APPARENTLY I ENTERED A TYPO WHEN SETTING THE DATE FOR *THIS IOP*.  THE TIMES LISTED BELOW ARE CONSISTANT WITH THE CURRENT (INCORRECT) TIME OF THE DATA.  DATA TIME AND TIMES LISTED ARE 30 MINUTES AND 5 SECONDS *BEHIND* THE CORRECT TIME.

0700z

Begin startup. Error noted: "Transmitter is off during an INGEST scan."  Did not see to have any affect of scanning or display - assuming data are OK.

0719z

Scanning started.

0751z

Short ÔbrownoutÕ lasting <= 1 second

0813z

Nearly 40 dBZ just N of burn area with upper 30 dBZ in nurn area at 5.0 deg. elev. Echoes increasing in intensity

0916z

Brownout

0949z

Noticed time error.  See above.

1047z

Brownout

1213z

Brownout. Noticed that over the past 45 minutes or so, the truck seems to be "settling".  I.e., one of the stands used to level the truck seems to have lowered some.

1329z

Shutting down

 

 

 

NOTE :: Data and note-entry times are correct.  (See IOP_A_notes.txt)

 

1908z

Started scanning. Snow at radar site. Drove through rain, snow, sleet on way to site from hotel. 40 dBZ echoes in and N of burn area, but mostly (if not all) frozen. 50+ dBZ echoes at 17 km and 50 km N of radar.

2021z

Ice pellets, followed by graupel showers at radar site

2026z

Graupel shower ended.

2106

Hvy shower

2114z

Not certain, but possible (very small) funnel cloud visible to SSE of radar, approx. 5 km

2325z

Shutdown. Noted several "brownouts" during this IOP, but failed to note times.  No apparent affects.