BLACK SWAN 17 OPBULL 11

Post date: Oct 7, 2017 5:00:15 PM

BLACK SWAN 17 EXERCISE DIRECTOR

C.M. CURTIN, SPC (OH), HHC/2/4 OHMR

CHARLES.CURTIN@OHMR.OHIO.GOV

+1 614 398 0045

KD8TTE BEXLEY OH 43209

R 071700Z OCT 2017

FM NNO5HD OHMR OH

TO ALL BLACK SWAN 17 EXERCISE PARTICIPANTS

BT

UNCLAS

SUBJ: BLACK SWAN 17 OPBULL 11

1. The simulated severe weather warning is to be transmitted to all BLACK SWAN 17 participants, complete with TEST / EXERCISE text, after 1700Z until 2100Z.
2. Participants are to adjust local play to accommodate this activity where possible, e.g., SKYWARN may activate spotters, CERT may activate damage assessment teams, etc.
3. Situation reports including simulated local severe weather and impact should be directed by TEST PRIORITY precedence radiogram to:

OHIO EOC W8SGT

COLUMBUS OH 43235

1. Reports received will be integrated into future bulletins in exercise play.
2. EXERCISE INFO: Several tornadoes already reported from Iowa through Ohio as part of this group of storms. Iowa and Illinois are now experiencing flash floods from severe rainfall. ARES activations seen throughout Ohio. Ohio emergency management and military assets have been called to alert in anticipation of need for rapid response. THIS IS AN EXERCISE.
3. The remainder of this bulletin is text for transmission as instructed above.

TEST…TEST…TEST…IMMEDIATE BROADCAST REQUESTED

TEST…TEST…TEST…SEVERE THUNDERSTORM WATCH NUMBER 999

NWS STORM PREDICTION CENTER NORMAN OK

100 PM EDT SAT OCT 7 2017

THE NWS STORM PREDICTION CENTER HAS ISSUED A

TEST SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

EXTREME SOUTHEAST INDIANA

EXTREME NORTHERN KENTUCKY

MOST OF CENTRAL AND SOUTHERN OHIO

CENTRAL AND NORTHWEST WEST VIRGINIA

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 100 PM UNTIL

800 PM EDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST

NORTHWEST OF DAYTON OHIO TO 45 MILES EAST OF PARKERSBURG WEST

VIRGINIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.

DISCUSSION...A DEVELOPING MCS/BOW ECHO ACROSS INDIANA IS EXPECTED TO

MOVE ESEWD THROUGH THE AFTERNOON/EVENING AT ROUGHLY 50 KT. THE

STORM ENVIRONMENT DOWNSTREAM FEATURES STRONG INSTABILITY AND

SUFFICIENT DEEP-LAYER FLOW/SHEAR TO MAINTAIN AN ORGANIZED MCS...AND

THERE WILL BE THE POTENTIAL FOR WIDESPREAD DAMAGING WINDS /SOME

SIGNIFICANT/ WITH THIS BOWING SYSTEM THROUGH THIS EVENING.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 650. MEAN STORM

MOTION VECTOR 29050.

THIS IS A TEST MESSAGE. DO NOT TAKE ACTION BASED ON THIS TEST

MESSAGE USED ONLY FOR A SEVERE THUNDERSTORM EXERCISE/SIMULATION.

BT

NNNN