June 4, 2008 Derecho Event

[Kmlwx]

I'm doing a final report for an emergency management class on the June 4, 2008 derecho event in the Mid-Atlantic region (specifically the DC area)

Any links, resources, and other information would be GREATLY appreciated.

Radar grabs are a lower priority but still would be appreciated in the end. Most specifically looking for information about the event as a whole and the emergency response/preparedness of the area. I know pretty much exactly what my report is going to entail but need supplemental info. All of my warning archives from that day are on another computer that is inaccessible to me at this time.

Thanks!

[Ian]

ugh i just forgot all that stuff is gone on eastern

[ThePhotoGuy]

Might Be Helpful:

http://www.erh.noaa.gov/lwx/events/2008Jun04/pns1.php

http://www.erh.noaa.gov/lwx/events/2008Jun04/lsr_map.php

http://www.erh.noaa.gov/lwx/events/2008Jun04/lsr.php

http://www.erh.noaa.gov/lwx/events/2008Jun04/pns_fsc.php

http://www.erh.noaa.gov/lwx/events/2008Jun04/pns_chesapeake.php

[Kmlwx]

Might Be Helpful:

http://www.erh.noaa....8Jun04/pns1.php

http://www.erh.noaa....n04/lsr_map.php

http://www.erh.noaa....08Jun04/lsr.php

http://www.erh.noaa....n04/pns_fsc.php

http://www.erh.noaa...._chesapeake.php

Excellent! Thanks, man! This will be an extreme help.

[Ian]

Good thread just to dump some stuff anyway, not sure you need all or any of this...

CommuteCast: Severe Weather Moving Through

http://voices.washingtonpost.com/capitalweathergang/2008/06/commutecast_severe_weather_set.html

Storms Continue to Batter Area

http://voices.washingtonpost.com/capitalweathergang/2008/06/storms_moving_away_major_impac.html

*Over 200,000 power outages in Northern Virginia (Dominion Power)

*Over 100,000 outages reported by Pepco in DC and Maryland

*100,000+ BGE customers without power in Maryland.

*Many trees and power lines down throughout area

*Wind gust to 66 mph recorded at Andrews Air Force Base, 59 mph at National.

June 4, 2008 Severe Weather

http://www.erh.noaa.gov/er/lwx/events/2008Jun04/

Recap: June 4 Severe Weather Outbreak

http://voices.washingtonpost.com/capitalweathergang/2008/06/june_4_2008_severe_weather_out_1.html

One Dead After Powerful Storms

http://www.washingtonpost.com/wp-dyn/content/article/2008/06/04/AR2008060402818.html?hpid=topnews

Reports: http://spc.noaa.gov/climo/reports/080604_rpts.html

[Kmlwx]

ugh i just forgot all that stuff is gone on eastern

Yeah, I went to click on my Eastern bookmark (it's still up there on Chrome) and remembered when I got the blank white page. It's a shame I waited until the last minute to get specific sources (I've written most of it already but need a lot of sources to cite).

[Kmlwx]

Good thread just to dump some stuff anyway, not sure you need all or any of this...

CommuteCast: Severe Weather Moving Through

http://voices.washin...eather_set.html

Storms Continue to Batter Area

http://voices.washin...ajor_impac.html

June 4, 2008 Severe Weather

http://www.erh.noaa....ents/2008Jun04/

Recap: June 4 Severe Weather Outbreak

http://voices.washin...ther_out_1.html

One Dead After Powerful Storms

http://www.washingto...ml?hpid=topnews

Reports: http://spc.noaa.gov/...80604_rpts.html

The power outage reports are particularly useful along with some of the CWG postings. Keep this stuff flowing folks!

[Ian]

Keep this stuff flowing folks!

you should really do your own homework.

[Kmlwx]

you should really do your own homework.

Hey...the report is essentially written.

[ThePhotoGuy]

MESOSCALE DISCUSSION 1210 NWS STORM PREDICTION CENTER NORMAN OK 0613 PM CDT WED JUN 04 2008 AREAS AFFECTED...SRN OH...WV...NRN VA...MD...DE CONCERNING...SEVERE THUNDERSTORM WATCH 447... VALID 042313Z - 050015Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 447 CONTINUES. THE SEVERE THREAT WILL CONTINUE THIS EVENING ACROSS THE REGION. A FEW TORNADOES ALONG WITH LARGE HAIL AND WIND DAMAGE WILL BE POSSIBLE WITH ORGANIZED STORM CLUSTERS. A REPLACEMENT WW WILL BE ISSUED BY 2330Z. SFC ANALYSIS SHOWS A QUASI-STATIONARY FRONT EXTENDING EWD ACROSS NRN OH AND PA WITH RUC GUIDANCE INDICATING MODERATE INSTABILITY SOUTH OF THE BOUNDARY. THIS COMBINED WITH STRONG VERTICAL SHEAR ASSOCIATED WITH A 55 TO 70 KT MID-LEVEL SPEED MAX CENTERED OVER WV WILL SUPPORT AN ORGANIZED SEVERE THREAT THIS EVENING. UNIDIRECTIONAL WINDS AND STRONG MID-LEVEL FLOW WILL BE FAVORABLE FOR WIND DAMAGE. THE SHEAR AND INSTABILITY WILL ALSO BE SUFFICIENT FOR SUPERCELLS WITH LARGE HAIL AND A FEW TORNADOES. ..BROYLES.. 06/04/2008 ATTN...WFO...PHI...AKQ...LWX...RNK...PBZ...RLX...ILN... 38187452 37907725 38158096 38818407 39598497 40088466 40048338 39478040 39347538 38917426

PUBLIC SEVERE WEATHER OUTLOOK

NWS STORM PREDICTION CENTER NORMAN OK

1215 PM CDT WED JUN 04 2008

...SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE CENTRAL PLAINS

AND MID ATLANTIC REGION THIS AFTERNOON AND TONIGHT...

THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE

DEVELOPMENT OF TORNADOES...LARGE HAIL AND DAMAGING WINDS OVER PARTS

OF THE CENTRAL PLAINS AND MID ATLANTIC REGION THIS AFTERNOON AND

TONIGHT.

THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE

DELAWARE

NORTHERN KANSAS

MARYLAND

SOUTHERN NEBRASKA

VIRGINIA

EASTERN WEST VIRGINIA

ELSEWHERE...SEVERE STORMS ARE ALSO POSSIBLE FROM...THE CENTRAL

PLAINS THROUGH THE MID MS VALLEY...OH VALLEY AND MID ATLANTIC

...ERN WV THROUGH VA...MD AND DEL...

THE ATMOSPHERE CONTINUES TO DESTABILIZE IN ADVANCE OF ONGOING LINE

OF THUNDERSTORMS MOVING EAST ACROSS WV WITH MODERATE INSTABILITY

ALREADY IN PLACE OVER VA. VERTICAL WIND PROFILES ARE FAVORABLE FOR

THIS LINE OF STORMS TO CONTINUE DEVELOPING EAST INTO THE AXIS OF

STRONGER INSTABILITY. THE LINE IS EXPECTED TO REMAIN ORGANIZED WITH

A ROTATING COMMA HEAD ON ITS NRN END AS IT CONTINUES EWD THROUGH THE

MID ATLANTIC. STEEP LOW LEVEL AND MID LEVEL LAPSE RATES ALONG WITH

MODERATE INSTABILITY WILL SUPPORT A THREAT FOR CORRIDORS OF

WIDESPREAD DAMAGING WIND. OTHER MORE DISCRETE STORMS MAY ALSO

DEVELOP ALONG TRAILING OUTFLOW BOUNDARY AS WELL AS AHEAD OF THE

LINE...AND THIS ACTIVITY WILL POSE A THREAT FOR LARGE

HAIL...DAMAGING WIND AND ISOLATED TORNADOES.

...NRN KS THROUGH SRN AND CNTRL NEB...

A WARM FRONT EXTENDS NORTHEAST THROUGH NE KS FROM A SURFACE LOW IN S

CNTRL KS. RICH LOW LEVEL MOISTURE...STRONG SURFACE HEATING AND STEEP

LAPSE RATES ARE CONTRIBUTING TO STRONG INSTABILITY IN THE VICINITY

OF THIS BOUNDARY FROM NRN KS INTO SRN NEB. HOWEVER...THE ATMOSPHERE

IS EXPECTED TO REMAIN CAPPED IN THIS REGION UNTIL LATE AFTERNOON OR

EARLY EVENING WHEN AN INTENSIFYING SLY LOW LEVEL JET WILL INCREASE

CONVERGENCE ALONG THE RETREATING FRONT AND RESULT IN THUNDERSTORM

INITIATION. STRONG VERTICAL SHEAR PROFILES WILL SUPPORT SUPERCELLS

WITH A THREAT OF VERY LARGE HAIL AND TORNADOES...A FEW OF WHICH

COULD BE STRONG. OTHER STORMS MAY DEVELOP FARTHER WEST OVER THE HIGH

PLAINS AND SPREAD EAST THROUGH NEB DURING THE EVENING. THE PRIMARY

THREAT WILL LIKELY TRANSITION TO DAMAGING WIND AND LARGE HAIL AS THE

EVENING PROGRESSES.

THOSE IN THE THREATENED AREA ARE URGED TO REVIEW SEVERE WEATHER

SAFETY RULES AND TO LISTEN TO RADIO...TELEVISION...AND NOAA WEATHER

RADIO FOR POSSIBLE WATCHES...WARNINGS...AND STATEMENTS LATER TODAY.

..DIAL.. 06/04/2008

$$

DAY 1 CONVECTIVE OUTLOOK

NWS STORM PREDICTION CENTER NORMAN OK

0759 PM CDT TUE JUN 03 2008

VALID 040100Z - 041200Z

...THERE IS A MDT RISK OF SVR TSTMS ACROSS NRN MO...CENTRAL AND

PARTS OF SRN IL...SRN HALF OF IND...SWRN OH AND NRN/NERN KY...

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE CENTRAL HIGH PLAINS TO

THE MID ATLANTIC REGION...

...SYNOPSIS...

18Z GFS/NAM MAINTAIN LIKELIHOOD FOR FURTHER AMPLIFICATION OF LARGE

SCALE TROUGH ACROSS THE WRN U.S. AS A SHORT WAVE TROUGH...NOW

LOCATED JUST OFF THE WA/ORE COAST...MOVES SEWD WITH ACCOMPANYING

STRONG WNWLY FLOW ALOFT INTO CA/WRN NV. DOWNSTREAM A BAND OF 50-60

KT WSWLY MID LEVEL WINDS WILL EXTEND FROM THE CENTRAL/SRN ROCKIES

THROUGH THE MID MS TO OH VALLEYS.

...OH VALLEY WSWWD TO LOWER MO VALLEY/OZARKS TO SRN PLAINS...

WATER VAPOR IMAGERY INDICATED A SHORT WAVE TROUGH OVER ERN KS EARLY

THIS EVENING WITH THIS FEATURE EXPECTED TO REACH THE LOWER OH VALLEY

BY 12Z WEDNESDAY. A SECOND IMPULSE CURRENTLY LOCATED ACROSS WRN KS/

OK PANHANDLE WILL TRANSLATE EWD TO THE MID MS VALLEY BY LATE IN THE

FORECAST PERIOD. FORCING FOR ASCENT WITH THESE IMPULSES WILL

SUPPORT A STRENGTHENING SWLY LLJ EXTENDING FROM THE SRN PLAINS

THROUGH THE OZARKS TO OH VALLEY AND MID ATLANTIC REGION. SURFACE

ANALYSIS INDICATED A LOW OVER NERN KS WITH A BOUNDARY EXTENDING EWD

THROUGH NRN MO TO CENTRAL IL AND SRN IND TO NERN KY. ADDITIONAL

BOUNDARIES WERE ANALYZED FROM CENTRAL IL INTO SWRN OH...AND FROM

WEST CENTRAL IL TO NRN IND AND THROUGH LAKE ERIE. ACTIVE CORRIDOR

FOR SEVERE STORMS IS EXPECTED TO BE ALONG THE FORMER BOUNDARY THAT

EXTENDED FROM NRN MO THROUGH LOWER OH VALLEY WHERE LOW LEVEL

MOISTURE IS GREATER WITH SURFACE DEWPOINTS IN THE LOWER 70S. THE

IMPULSES TRACKING EWD WILL SUPPORT ONGOING AND NEW TSTM DEVELOPMENT

ALONG THIS CORRIDOR THROUGH TONIGHT...WITH A TENDENCY FOR CONVECTION

TO BACKBUILD INTO THE LLJ AXIS ACROSS ERN KS TO MID MS VALLEY.

STRENGTHENING LLJ THROUGHOUT THIS REGION BENEATH STRONG WLY MID

LEVEL FLOW WILL MAINTAIN STRONG EFFECTIVE BULK SHEAR AND LOW LEVEL

SHEAR FOR SUPERCELLS...SOME TORNADIC...WITH THE LIKELIHOOD FOR ONE

OR MORE MCSS TO DEVELOP OVERNIGHT INTO THE OH VALLEY. ALTHOUGH

DAMAGING WINDS...SOME SIGNIFICANT...AND HAIL WOULD THE PRIMARY

THREATS WITH THE MCSS...STRONG LOW LEVEL SHEAR SHOULD ALSO RESULT IN

A CONTINUED THREAT FOR TORNADOES WITH ANY EMBEDDED SUPERCELLS WITHIN

ANY LINE SEGMENTS/BOW STRUCTURES.

FARTHER SW...WRN KS IMPULSE IS EXPECTED TO SUPPORT ONGOING CLUSTER

OF TSTMS...NOW MOVING INTO SOUTH CENTRAL KS/NWRN OK...WITH

ADDITIONAL ACTIVITY LIKELY ALONG A PAIR OF SURFACE BOUNDARIES

EXTENDING SWWD FROM NERN KS THROUGH CENTRAL/ERN KS INTO FAR NRN OK.

A VERY UNSTABLE AIR MASS OVER CENTRAL/ERN KS /MLCAPE EXCEEDING 2500

J/KG/...WITH VERY LITTLE CAP SUGGESTS NEW DEVELOPMENT WILL OCCUR

SWWD FROM ERN KS AND ONGOING STORMS IN SWRN KS/NWRN OK WILL BE

MAINTAINED AS THEY TRACK ENEWD THIS EVENING. VERY LARGE

HAIL/DAMAGING WINDS AND ISOLATED TORNADOES WILL BE POSSIBLE WITH

THIS ACTIVITY.

...MID ATLANTIC REGION...

A CORRIDOR OF MOISTURE RETURN NWD THROUGH ERN VA TO SERN PA COMBINED

WITH SURFACE HEATING AHEAD OF THE EWD MOVING MCV/SHORT WAVE

TROUGH...NOW APPROACHING THE MID ATLANTIC REGION...HAS AIDED IN

DESTABILIZATION. TSTMS DEVELOPED ALONG THE LOW LEVEL CONVERGENCE

ZONE/MOISTURE AXIS...WITH ACTIVITY LIKELY PEAKING IN INTENSITY FROM

NOW THROUGH ABOUT 02Z. THEREAFTER...BOUNDARY LAYER COOLING/

STABILIZATION SHOULD LIMIT THE POTENTIAL FOR SURFACE BASED ACTIVITY.

A THREAT FOR DAMAGING WINDS MAY REACH PARTS OF PA SWD THROUGH MD TO

NRN VA AS A POTENTIAL MCS DEVELOPING OVER THE OH VALLEY LATER THIS

EVENING/TONIGHT MOVES EWD INTO THIS REGION LATE IN THE FORECAST

PERIOD.

...CENTRAL HIGH PLAINS EWD INTO SRN NEB/NRN KS...

THE MID LEVEL IMPULSE OVER THIS REGION COMBINED WITH A COLLECTIVE

COLD POOL ATTENDANT TO ONGOING CLUSTER OF TSTMS OVER SWRN NEB INTO

WEST CENTRAL KS SHOULD SUPPORT A FORWARD PROPAGATING MCS THIS

EVENING. DOWNSTREAM MOIST/UNSTABLE AIR MASS WITH OBJECTIVE ANALYSES

INDICATING STRONG DCAPE VALUES /1200-1800 J/KG/ SUGGESTS THE

POTENTIAL FOR DAMAGING WINDS AS THIS ACTIVITY PROGRESSES EWD. LARGE

HAIL WILL ALSO BE POSSIBLE GIVEN STEEP MID LEVEL LAPSE RATES AND

EFFECTIVE BULK SHEAR AROUND 40 KT SUPPORTIVE OF ROTATING UPDRAFTS.

ADDITIONAL STORMS MAY DEVELOP OFF THE HIGHER TERRAIN OF NERN CO

LATER THIS EVENING...AS ASCENT ATTENDANT TO A GREAT BASIN SHORT WAVE

TROUGH SPREADS EWD OVERNIGHT. SOME OF THIS ACTIVITY COULD ALSO BE

SEVERE.