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Status and Use of the DC Lightning Mapping Array. Eric C. Bruning University of Maryland and NOAA/NESDIS Cooperative Institute for Climate Studies Steven J. Goodman NOAA/NASA GOES-R Program Office, GSFC, Greenbelt, MD Richard Blakeslee NASA Marshall Space Flight Center, Huntsville, AL

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Status and use of the dc lightning mapping array

Status and Use of the DC Lightning Mapping Array

Eric C. Bruning

University of Maryland and NOAA/NESDIS Cooperative Institute for Climate Studies

Steven J. Goodman

NOAA/NASA GOES-R Program Office, GSFC, Greenbelt, MD

Richard Blakeslee

NASA Marshall Space Flight Center, Huntsville, AL

Jeff Bailey & John Hall

University of Alabama in Huntsville, Huntsville , AL

Steven Zubrick

NOAA/NWS Sterling, VA

Paul Krehbiel

New Mexico Tech, Socorro, NM

28 July 2009

Southern Thunder, Cocoa Beach, FL


Dclma history and people
DCLMA: History and People

  • Deployed 2006 by NMT and NSSTC (NASA MSFC, UAH) and upgraded 2009 (two stations). Currently John Hall (data and products) and Jeff Bailey (hardware maintenance) work closely with New Mexico Tech to ensure continued operation.

  • Partners at universities and community colleges provide space and network connectivity for equipment. They receive access to data and educational opportunities for students.

Real-time status display. Data latency of a few seconds.

LMA antenna and electronics box

Courtesy NMT


Experimental public imagery http branch nsstc nasa gov public dclma
Experimental public imageryhttp://branch.nsstc.nasa.gov/PUBLIC/DCLMA/

Courtesy NMT


Dclma current configuration
DCLMA: Current configuration

Two new sites in May 2009

10 total stations

UMD Ag Station,

Upper Marlboro, MD

NVCC - Woodbridge, VA

Improved margin to support robust performance


Dclma current configuration1
DCLMA: Current configuration

Two new sites in May 2009

UMD Baltimore County

Johns Hopkins Adv. Physics Lab

Montgomery College

Sterling, VA NOAA Test / Eval Facility

Howard University

UMD Ag Station, Upper Marlboro

NVCC Annandale

George Mason Univ.

NVCC Woodbridge

College of Southern Maryland

map


Impact of extra stations
Impact of extra stations

3 June 2009

  • Compare previous network performance with two stations missing (6 stations) to current performance with one station missing (9 stations)

  • Using reprocessed (non-decimated, science-quality) data

    • Loose quality filtering (Χ2 < 5, stations >= 6)

  • Moderate range (80 km)

  • Storm with severe thunderstorm warning


More flashes resolved
More flashes resolved

  • 2 minutes of data

    • 110 vs. 2247 sources

    • All detections with old configuration were with minimum number of stations

  • 5 seconds of data:

    • 2 vs. 100 sources

    • Old does not detect a –CG that killed 12 yr old boy on a baseball field south of Fredericksburg, VA


Long range detection
Long-range detection

  • 17 July 2009

    • Severe storm east of Roanoke

    • Three tornadoes

Full-day summary image from public webpage


17 july 2009 2 min counts
17 July 2009 2 min counts

Lightning rates increase as storm enters more unstable air. More sudden changes superimposed on long term trend convolved with detection efficiency. EF0 was a subtle, fast spinup (Keighton, pers. comm.)

900

1430 SVR

1521 TOR

Warnings issued by NWS

Damage survey results

(tornadoes only,

also many wind reports beginning 1400 UTC)

1525 EF0

Total sources

VHF Source Count

1502 EF1

1448 EF1

Maximum sources per pixel

0

1415 UTC

1600UTC


17 july 2009 2 min 8 km glm like source density

1

10

100

17 July 2009 2 min, 8 km GLM-like source density

Cell development characterized by jumps in max density followed by increase in cell footprint and expansion of area covered by max.

Needs flash sorting to even out detection efficiency effects

North distance

EF1

EF1

EF0

200 km

East distance

200 km

Sources per pixel


Electrification in winter early spring convection
Electrification in winter / early spring convection

29 March 2009, 4:30pm EDT

  • T=73, Td=51°F ahead of front (T = low 50s °F behind).

  • 18Z sounding shows 0°C at 3 km, -10°C at 4.5 km -15°C at 5 km. Cloud top at ~10 km.

  • Upper IC flashes indicate negative charging to graupel

  • Low level flashes may be upward initiating positive leaders (many cluster at same spot), but seeing more detections than usual for positive channels. Need to look at ground strike data

  • Opportunity to understand likely flash patterns and underlying science in colder climatic regime

storm

charge

+

+?


Operational data delivery supports goes r proving ground

Severe storm

N-AWIPS display at SPC

Ama Ba / NWS MDL: Cell-based lightning trends in AWIPS at LWX

Operational data delivery supports GOES-R Proving Ground

  • NWS Forecast Office in Sterling Virginia

    • Steve Zubrick

  • LMA also covers parts of four surrounding WFOs.

    • Blacksburg and Wakefield now pulling DCLMA data from ERH

  • Storm Prediction Center and NSSL Experimental Warning Program, Norman, OK

    • Chris Siewert, Russ Schneider, Bob Rabin, and Kristin Kuhlman

  • Planned displays of flash-level GLM proxy data; migration to AWIPS-II displays


Operational use and trials
Operational use and trials

26 June 2009

Severe storm; tree falls on car in DC

  • See talks this afternoon

    • Steve Zubrick, 1:15 pm, Operational Use of the DC Lightning Mapping Array at the NWS Weather Forecast Office, Sterling, VA

    • Kristin Kuhlman et al., 3:15 pm, Results from the 2009 Experimental Warning Program: Forecaster Use and Evaluation of Total Lightning Data

    • Chris Siewert et al., 3:30 pm, Activities within the NESDIS supported SPC GOES-R Proving Ground in preparation for use of Geostationary Lightning Mapper data in forecast operations

11 July 2009

Non-severe storms