This is the chart (again):
And this is the exact log of each strike detected during that storm:
CIGRE lightning flash counter logger, Copyright (c) 1999 Iacopo Giangrandi Wed Aug 19 15:16:30 1998 -- 271 -- Log session started. Wed Aug 19 15:16:39 1998 -- 272 -- Lightning strike detected. Wed Aug 19 17:49:18 1998 -- 273 -- Lightning strike detected. Wed Aug 19 19:34:30 1998 -- 274 -- Lightning strike detected. Wed Aug 19 19:36:34 1998 -- 275 -- Lightning strike detected. Wed Aug 19 19:38:49 1998 -- 276 -- Lightning strike detected. Wed Aug 19 19:42:05 1998 -- 277 -- Lightning strike detected. Wed Aug 19 19:43:04 1998 -- 278 -- Lightning strike detected. Wed Aug 19 19:54:38 1998 -- 279 -- Lightning strike detected. Wed Aug 19 19:55:39 1998 -- 280 -- Lightning strike detected. Wed Aug 19 19:58:00 1998 -- 281 -- Lightning strike detected. Wed Aug 19 19:58:56 1998 -- 282 -- Lightning strike detected. Wed Aug 19 20:00:20 1998 -- 283 -- Lightning strike detected. Wed Aug 19 20:01:33 1998 -- 284 -- Lightning strike detected. Wed Aug 19 20:02:41 1998 -- 285 -- Lightning strike detected. Wed Aug 19 20:03:55 1998 -- 286 -- Lightning strike detected. Wed Aug 19 20:04:56 1998 -- 287 -- Lightning strike detected. Wed Aug 19 20:12:47 1998 -- 288 -- Lightning strike detected. Wed Aug 19 20:16:02 1998 -- 289 -- Lightning strike detected. Wed Aug 19 20:17:46 1998 -- 290 -- Lightning strike detected. Wed Aug 19 20:18:23 1998 -- 291 -- Lightning strike detected. Wed Aug 19 20:19:01 1998 -- 292 -- Lightning strike detected. Wed Aug 19 20:20:04 1998 -- 293 -- Lightning strike detected. Wed Aug 19 20:22:52 1998 -- 294 -- Lightning strike detected. Wed Aug 19 20:23:49 1998 -- 295 -- Lightning strike detected. Wed Aug 19 20:25:02 1998 -- 296 -- Lightning strike detected. Wed Aug 19 20:26:21 1998 -- 297 -- Lightning strike detected. Wed Aug 19 20:28:11 1998 -- 298 -- Lightning strike detected. Wed Aug 19 20:36:49 1998 -- 299 -- Lightning strike detected. Wed Aug 19 20:38:22 1998 -- 300 -- Lightning strike detected. Wed Aug 19 20:38:44 1998 -- 301 -- Lightning strike detected. Wed Aug 19 20:39:39 1998 -- 302 -- Lightning strike detected. Wed Aug 19 20:39:40 1998 -- 303 -- Lightning strike detected. Wed Aug 19 20:41:40 1998 -- 304 -- Lightning strike detected. Wed Aug 19 20:43:50 1998 -- 305 -- Lightning strike detected. Wed Aug 19 20:44:50 1998 -- 306 -- Lightning strike detected. Wed Aug 19 20:45:26 1998 -- 307 -- Lightning strike detected. Wed Aug 19 20:46:42 1998 -- 308 -- Lightning strike detected. Wed Aug 19 20:48:17 1998 -- 309 -- Lightning strike detected. Wed Aug 19 20:50:05 1998 -- 310 -- Lightning strike detected. Wed Aug 19 20:54:51 1998 -- 311 -- Lightning strike detected. Wed Aug 19 20:55:18 1998 -- 312 -- Lightning strike detected. Wed Aug 19 21:00:23 1998 -- 313 -- Lightning strike detected. Wed Aug 19 21:05:25 1998 -- 314 -- Lightning strike detected. Wed Aug 19 21:06:21 1998 -- 315 -- Lightning strike detected. Wed Aug 19 21:07:28 1998 -- 316 -- Lightning strike detected. Wed Aug 19 21:10:07 1998 -- 317 -- Lightning strike detected. Wed Aug 19 21:27:38 1998 -- 318 -- Lightning strike detected. Wed Aug 19 21:28:11 1998 -- 319 -- Lightning strike detected. Wed Aug 19 21:28:26 1998 -- 320 -- Lightning strike detected. Wed Aug 19 21:29:55 1998 -- 321 -- Lightning strike detected. Wed Aug 19 21:31:45 1998 -- 322 -- Lightning strike detected. Wed Aug 19 21:38:03 1998 -- 323 -- Lightning strike detected. Wed Aug 19 21:40:33 1998 -- 324 -- Lightning strike detected. Wed Aug 19 21:40:36 1998 -- 325 -- Lightning strike detected. Wed Aug 19 21:41:58 1998 -- 326 -- Lightning strike detected. Wed Aug 19 21:43:24 1998 -- 327 -- Lightning strike detected. Wed Aug 19 21:43:25 1998 -- 328 -- Lightning strike detected. Wed Aug 19 21:43:59 1998 -- 329 -- Lightning strike detected. Wed Aug 19 21:44:51 1998 -- 330 -- Lightning strike detected. Wed Aug 19 21:45:03 1998 -- 331 -- Lightning strike detected. Wed Aug 19 21:45:31 1998 -- 332 -- Lightning strike detected. Wed Aug 19 21:48:57 1998 -- 333 -- Lightning strike detected. Wed Aug 19 21:49:25 1998 -- 334 -- Lightning strike detected. Wed Aug 19 21:50:30 1998 -- 335 -- Lightning strike detected. Wed Aug 19 21:51:07 1998 -- 336 -- Lightning strike detected. Wed Aug 19 21:51:25 1998 -- 337 -- Lightning strike detected. Wed Aug 19 21:52:18 1998 -- 338 -- Lightning strike detected. Wed Aug 19 21:52:36 1998 -- 339 -- Lightning strike detected. Wed Aug 19 21:52:36 1998 -- 340 -- Lightning strike detected. Wed Aug 19 21:54:14 1998 -- 341 -- Lightning strike detected. Wed Aug 19 21:54:15 1998 -- 342 -- Lightning strike detected. Wed Aug 19 21:54:53 1998 -- 343 -- Lightning strike detected. Wed Aug 19 21:55:33 1998 -- 344 -- Lightning strike detected. Wed Aug 19 21:55:45 1998 -- 345 -- Lightning strike detected. Wed Aug 19 21:56:28 1998 -- 346 -- Lightning strike detected. Wed Aug 19 21:56:46 1998 -- 347 -- Lightning strike detected. Wed Aug 19 21:57:27 1998 -- 348 -- Lightning strike detected. Wed Aug 19 21:57:28 1998 -- 349 -- Lightning strike detected. Wed Aug 19 21:57:44 1998 -- 350 -- Lightning strike detected. Wed Aug 19 21:57:59 1998 -- 351 -- Lightning strike detected. Wed Aug 19 21:58:21 1998 -- 352 -- Lightning strike detected. Wed Aug 19 21:58:22 1998 -- 353 -- Lightning strike detected. Wed Aug 19 21:58:35 1998 -- 354 -- Lightning strike detected. Wed Aug 19 21:58:58 1998 -- 355 -- Lightning strike detected. Wed Aug 19 21:59:29 1998 -- 356 -- Lightning strike detected. Wed Aug 19 21:59:32 1998 -- 357 -- Lightning strike detected. Wed Aug 19 21:59:51 1998 -- 358 -- Lightning strike detected. Wed Aug 19 22:00:57 1998 -- 359 -- Lightning strike detected. Wed Aug 19 22:01:03 1998 -- 360 -- Lightning strike detected. Wed Aug 19 22:01:32 1998 -- 361 -- Lightning strike detected. Wed Aug 19 22:02:15 1998 -- 362 -- Lightning strike detected. Wed Aug 19 22:02:21 1998 -- 363 -- Lightning strike detected. Wed Aug 19 22:02:24 1998 -- 364 -- Lightning strike detected. Wed Aug 19 22:02:32 1998 -- 365 -- Lightning strike detected. Wed Aug 19 22:04:04 1998 -- 366 -- Lightning strike detected. Wed Aug 19 22:04:29 1998 -- 367 -- Lightning strike detected. Wed Aug 19 22:04:31 1998 -- 368 -- Lightning strike detected. Wed Aug 19 22:05:15 1998 -- 369 -- Lightning strike detected. Wed Aug 19 22:05:23 1998 -- 370 -- Lightning strike detected. Wed Aug 19 22:05:30 1998 -- 371 -- Lightning strike detected. Wed Aug 19 22:05:40 1998 -- 372 -- Lightning strike detected. Wed Aug 19 22:05:54 1998 -- 373 -- Lightning strike detected. Wed Aug 19 22:06:13 1998 -- 374 -- Lightning strike detected. Wed Aug 19 22:06:38 1998 -- 375 -- Lightning strike detected. Wed Aug 19 22:07:18 1998 -- 376 -- Lightning strike detected. Wed Aug 19 22:09:01 1998 -- 377 -- Lightning strike detected. Wed Aug 19 22:09:18 1998 -- 378 -- Lightning strike detected. Wed Aug 19 22:09:47 1998 -- 379 -- Lightning strike detected. Wed Aug 19 22:10:18 1998 -- 380 -- Lightning strike detected. Wed Aug 19 22:11:30 1998 -- 381 -- Lightning strike detected. Wed Aug 19 22:13:22 1998 -- 382 -- Lightning strike detected. Wed Aug 19 22:13:55 1998 -- 383 -- Lightning strike detected. Wed Aug 19 22:14:28 1998 -- 384 -- Lightning strike detected. Wed Aug 19 22:15:15 1998 -- 385 -- Lightning strike detected. Wed Aug 19 22:16:22 1998 -- 386 -- Lightning strike detected. Wed Aug 19 22:17:11 1998 -- 387 -- Lightning strike detected. Wed Aug 19 22:17:25 1998 -- 388 -- Lightning strike detected. Wed Aug 19 22:17:45 1998 -- 389 -- Lightning strike detected. Wed Aug 19 22:18:20 1998 -- 390 -- Lightning strike detected. Wed Aug 19 22:19:18 1998 -- 391 -- Lightning strike detected. Wed Aug 19 22:20:01 1998 -- 392 -- Lightning strike detected. Wed Aug 19 22:20:14 1998 -- 393 -- Lightning strike detected. Wed Aug 19 22:20:22 1998 -- 394 -- Lightning strike detected. Wed Aug 19 22:20:22 1998 -- 395 -- Lightning strike detected. Wed Aug 19 22:21:07 1998 -- 396 -- Lightning strike detected. Wed Aug 19 22:21:07 1998 -- 397 -- Lightning strike detected. Wed Aug 19 22:21:32 1998 -- 398 -- Lightning strike detected. Wed Aug 19 22:23:53 1998 -- 399 -- Lightning strike detected. Wed Aug 19 22:24:18 1998 -- 400 -- Lightning strike detected. Wed Aug 19 22:24:19 1998 -- 401 -- Lightning strike detected. Wed Aug 19 22:24:34 1998 -- 402 -- Lightning strike detected. Wed Aug 19 22:25:21 1998 -- 403 -- Lightning strike detected. Wed Aug 19 22:25:38 1998 -- 404 -- Lightning strike detected. Wed Aug 19 22:26:43 1998 -- 405 -- Lightning strike detected. Wed Aug 19 22:27:51 1998 -- 406 -- Lightning strike detected. Wed Aug 19 22:28:15 1998 -- 407 -- Lightning strike detected. Wed Aug 19 22:29:35 1998 -- 408 -- Lightning strike detected. Wed Aug 19 22:30:29 1998 -- 409 -- Lightning strike detected. Wed Aug 19 22:31:54 1998 -- 410 -- Lightning strike detected. Wed Aug 19 22:32:53 1998 -- 411 -- Lightning strike detected. Wed Aug 19 22:33:09 1998 -- 412 -- Lightning strike detected. Wed Aug 19 22:34:50 1998 -- 413 -- Lightning strike detected. Wed Aug 19 22:35:21 1998 -- 414 -- Lightning strike detected. Wed Aug 19 22:36:27 1998 -- 415 -- Lightning strike detected. Wed Aug 19 22:38:54 1998 -- 416 -- Lightning strike detected. Wed Aug 19 22:40:00 1998 -- 417 -- Lightning strike detected. Wed Aug 19 22:41:46 1998 -- 418 -- Lightning strike detected. Wed Aug 19 22:42:16 1998 -- 419 -- Lightning strike detected. Wed Aug 19 22:43:40 1998 -- 420 -- Lightning strike detected. Wed Aug 19 22:44:59 1998 -- 421 -- Lightning strike detected. Wed Aug 19 22:46:39 1998 -- 422 -- Lightning strike detected. Wed Aug 19 22:47:27 1998 -- 423 -- Lightning strike detected. Wed Aug 19 22:47:58 1998 -- 424 -- Lightning strike detected. Wed Aug 19 22:49:48 1998 -- 425 -- Lightning strike detected. Wed Aug 19 22:50:57 1998 -- 426 -- Lightning strike detected. Wed Aug 19 22:52:02 1998 -- 427 -- Lightning strike detected. Wed Aug 19 22:52:11 1998 -- 428 -- Lightning strike detected. Wed Aug 19 22:55:07 1998 -- 429 -- Lightning strike detected. Wed Aug 19 22:56:34 1998 -- 430 -- Lightning strike detected. Wed Aug 19 22:58:29 1998 -- 431 -- Lightning strike detected. Wed Aug 19 23:01:19 1998 -- 432 -- Lightning strike detected. Wed Aug 19 23:02:15 1998 -- 433 -- Lightning strike detected. Wed Aug 19 23:06:05 1998 -- 434 -- Lightning strike detected. Wed Aug 19 23:06:51 1998 -- 435 -- Lightning strike detected. Wed Aug 19 23:08:51 1998 -- 436 -- Lightning strike detected. Wed Aug 19 23:14:25 1998 -- 437 -- Lightning strike detected. Wed Aug 19 23:17:23 1998 -- 438 -- Lightning strike detected. Wed Aug 19 23:18:48 1998 -- 439 -- Lightning strike detected. Wed Aug 19 23:47:49 1998 -- 440 -- Lightning strike detected. Wed Aug 19 23:52:43 1998 -- 441 -- Lightning strike detected. Wed Aug 19 23:56:36 1998 -- 442 -- Lightning strike detected. Thu Aug 20 7:37:06 1998 -- 442 -- Log session stopped.