The fourth weekly NSCAA regional rankings update is here, bringing with a new set of girls regional challengers. All but one regional No. 1 power held its top spot this week, with Region V's Rocky River (Ohio) capitalizing on Carmel's rocky last few weeks to catapult to No. 1 for the first time this season. Otherwise, there were plenty of new faces in the polls this week.

For the girls, here are breakdowns of each of the six regions and some of the most interesting movements of each.

Click here to view the girls national top 25 poll

Region I

Franklin's fall from No. 2 to No. 15 thanks to its first loss of the season opened things up in Region I this week. While Exeter calmly held its top rank, there was a shakeup at the New Hampshire dynasty's back. Central Catholic assumed the No. 2 spot with its 5-0-0 mark, while Trumbull shot up from No. 9 to No. 4 to announce its candidacy as one of the regional powers.

1. Exeter (Exeter, N.H.)

2. Central Catholic (Lawrence, Mass.)

3. Falmouth (Falmouth, Maine)

4. Trumbull (Trumbull, Conn.)

5. Champlain Valley Union (Hinesburg, Vt.)

6. Northwest Catholic (West Hartford, Conn.)

7. Newton North (Newton, Mass.)

8. Bow (Bow, N.H.)

9. East Greenwich (East Greenwich, R.I.)

10. Bangor (Bangor, Maine)

11. Andover (Andover, Mass.)

12. Portsmouth (Portsmouth, R.I.)

13. Peoples Academy (Morrisville, Vt.)

14. Nashoba Regional (Nashoba, Mass.)

15. Franklin (Franklin, Mass.)

Region II

It was a rough week for New York's top five. While No. 1 South Side and No. 2 Washingtonville gripped tight their spots at the top of New York's regional poll, No. 3 Islip wasn't as lucky. Islip dropped out this week, allowing 5-0-0 Northport to move up from No. 7. Likewise, Long Island dynasty St. Anthony's fell all the way from No. 4 to out of the poll this week, and Massapequa replaced them after sitting at No. 13 last week.

1. South Side (Rockville Center, N.Y.)

2. Washingtonville (Washingtonville, N.Y.)

3. Northport (Northport, N.Y.)

4. Massapequa (Massapequa, N.Y.)

5. Webster Thomas (Webster, N.Y.)

6. Cornwall (Cornwall, N.Y.)

7. Commack (Commack, N.Y.)

8. Guilderland (Guilderland, N.Y.)

9. Jamesville-DeWitt (DeWitt, N.Y.)

10. Greece Odyssey (Rochester, N.Y.)

11. St. John the Baptist (West Islip, N.Y.)

12. Hoosick Fallas Central (Hoosick Falls, N.Y.)

13. Kellenberg Memorial (Uniondale, N.Y.)

14. Pearl River (Pearl River, N.Y.)

15. Garden City (Garden City, N.Y.)

Region III

Pennington's drop out of the poll from No. 7 was one of the few shakeups from this region, which was otherwise almost untouched and upset-free. Indeed, none of the top eight in this region has so much as tied a game.

1. Northern Highlands (Allendale, N.J.)

2. Cumberland Valley (Mechanicsburg, Pa.)

3. Immaculate Heart Academy (Township of Washington, N.J.)

4. Neshaminy (Langhorne, Pa.)

5. Lenape (Medford, N.J.)

6. Lower Dauphin (Hummelstown, Pa.)

7. Wilson (West Lawn, Pa.)

8. Montclair (Montclair, N.J.)

9. Central Bucks East (Doylestown, Pa.)

10. Eastern (Voorhees, N.J.)

11. Pennridge (Perkasie, Pa.)

12. Moorestown (Moorestown, Pa.)

13. Villa Joseph Marie (Holland, Pa.)

14. Hunterdon Central (Flemington, N.J.)

15. Quaker Valley (Leetsdale, Pa.)

Region IV 

Houston was named the new national No. 1 earlier this week, so their spot atop the Region IV poll is more than safe. Otherwise, there wasn't much movement in this region this week, as Good Counsel kept its spot snugly behind Houston, while Good Counsel rivals McDonogh (No. 6) and Bishop O'Connell (No. 8) continue to inch up closer in the polls.

1. Houston (Germantown, Tenn.)

2. Our Lady of Good Counsel (Olney, Md.)

3. Franklin (Franklin, Tenn.)

4. Sacred Heart Academy (Louisville, Ky.)

5. Winfield (Winfield, W.Va.)

6. McDonogh School (Owings Mills, Md.)

7. Charleston Catholic (Charleston, W.Va.)

8. Bishop O'Connell (Arlington, Va.)

9. Archbishop Spalding (Severn, Md.)

10. Father Ryan (Nashville, Tenn.)

11. Scott County (Georgetown, Ky.)

12. Hurricane (Hurricane, Tenn.)

13. Notre Dame Academy (Park Hills, Ky.)

14. Ravenwood (Brentwood, Tenn.)

15. Oak Ridge (Oak Ridge, Tenn.)

15. Bearden (Knoxville, Tenn.)

Region V

Two weeks ago, Carmel drew for the first time to drop from No. 1 to No. 4 in the national girls poll. Last week was a harder pill to swallow. The Indiana power lost for the first time to drop completely out of the national poll and slip from No. 1 to No. 6 in the regional ranking. Ohio's Rocky River was all too happy to pack up its 9-0-1 record and walk up to be the No. 1 for the first time this year.

1. Rocky River (Rocky River, Ohio)

2. Avon (Avon, Ind.)

3. Walsh Jesuit (Cuyahoga Falls, Ohio)

4. Twinsburg (Twinsburg, Ohio)

5. Burnsville (Burnsville, Minn.)

6. Carmel (Carmel, Ind.)

7. Zionsville (Zionsville, Ind.)

8. Minnetonka (Minnetonka, Minn.)

9. Dublin Coffman (Dublin, Ohio)

10. Magnificat (Rocky River, Ohio)

11. Reitz Memorial (Evansville, Ind.)

12. Lakeview North (Lakeview, Minn.)

t13. Pickerington North (Pickerington, Ohio)

t13. Guerin Catholic (Indianapolis, Ind.)

15. Hamilton Southeastern (Fishers, Ind.)

Region VI

Maria Carrillo and Skyline stayed pat, but Forest Grove's fall from No. 3 opened the door for Portland's Jesuit to move back up into the top three. And while Skyline kept its spot, Seattle-area district foe Issaquah fell from No. 5 to out of the poll this week, taking a small bit of the shine off of their meeting later this year. Last year, these two met for the state title. Entirely possible that happens again in 2013.

1. Maria Carrillo (Santa Rosa, Calif.)

2. Skyline (Sammamish, Wash.)

3. Jesuit (Portland, Ore.)

4. Montgomery (Santa Rosa, Calif.)

5. Alta (Sandy, Utah)

6. Palo Verde (Las Vegas, Nev.)

7. Gig Harbor (Gig Harbor, Wash.)

8. Tigard (Tigard, Ore.)

9. Skyline (Salt Lake City, Utah)

10. Bishop Gorman (Las Vegas, Nev.)

11. St. Pius (Albuquerque, N.M.)

12. Camas (Camas, Wash.)

13. Eldorado (Albuquerque, N.M.)

14. Oregon City (Oregon City, Ore.)

15. Timberline (Boise, Idaho)