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USGS Daily Statistics for Virginia

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The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 02056000 ROANOKE RIVER AT NIAGARA, VA


Roanoke County, Virginia
Hydrologic Unit Code 03010101
Latitude  37°15'18", Longitude  79°52'18" NAD27
Drainage area 509  square miles
Gage datum 819.7 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1926-10-01 -> 2020-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 601 587 898 926 587 489 304 280 353 421 316 591
2 559 668 767 839 653 459 329 261 267 505 347 517
3 618 733 752 798 682 459 369 258 248 328 365 485
4 684 869 917 796 657 447 485 357 260 323 532 598
5 522 732 920 948 699 526 396 334 277 303 447 514
6 516 756 898 802 719 454 352 299 569 268 349 418
7 537 837 906 821 716 436 350 270 428 273 365 487
8 619 722 773 842 675 443 332 261 402 364 360 521
9 604 686 721 898 616 525 293 284 269 376 338 496
10 573 662 736 980 572 494 337 283 278 318 397 463
11 538 737 720 836 566 480 320 314 254 405 332 484
12 589 667 739 758 550 450 348 327 242 359 447 473
13 513 723 829 810 544 453 330 292 239 319 393 472
14 536 872 883 916 519 428 326 406 231 276 348 482
15 639 729 825 818 576 436 314 433 213 323 328 487
16 593 699 753 1,020 607 444 317 543 322 305 415 500
17 509 760 924 874 563 474 332 463 388 441 357 451
18 538 797 980 785 611 433 275 496 491 375 355 470
19 761 813 946 711 602 406 271 401 403 509 412 424
20 727 757 933 826 545 417 259 310 377 410 390 410
21 652 777 1,070 739 520 596 268 283 288 352 323 449
22 666 907 945 779 568 498 284 291 412 399 313 489
23 791 1,020 889 654 522 385 303 293 395 388 331 477
24 658 951 1,030 804 527 357 291 288 267 371 356 482
25 770 896 905 925 543 311 253 291 236 347 387 517
26 752 833 914 906 481 355 262 303 254 353 387 569
27 647 747 899 845 477 442 296 273 297 367 370 497
28 665 741 986 746 629 377 279 272 488 361 389 533
29 635 709 933 667 567 408 289 278 430 316 567 627
30 616   935 592 606 353 304 258 572 289 452 621
31 696   889   612   270 352   312   585