Alert archive / Alabama / Flash Flood Warnings in 2026
Flash Flood Warning 29, NWS Birmingham, AL
NWS Birmingham, AL issued this flash flood warning at Jul 31, 2026, 6:26 PM CDT for Tuscaloosa County, Alabama. It was in force for 2 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 31, 2026, 6:26 PM CDT (23:26 UTC)
- Expired
- Jul 31, 2026, 8:49 PM CDT
- In force
- 2 hr
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Tuscaloosa County, AL
The radar
The Birmingham radar (KBMX), 71 km from the middle of the area, began a volume at 23:30 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 31, 6:32 PM CDT | FLASH FLOOD | 1 N University Mall, AL | Multiple reports of flooding in Tuscaloosa along McFarland Boulevard and Paul Bryant Drive. McFarland Boulevard railroad underpass impassable. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 6 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 11.4 hours before the alert went out and 70 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1083 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
382
WGUS54 KBMX 312326
FFWBMX
ALC125-010230-
/O.NEW.KBMX.FF.W.0029.260731T2326Z-260801T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
626 PM CDT Fri Jul 31 2026
The National Weather Service in Birmingham has issued a
* Flash Flood Warning for...
South Central Tuscaloosa County in west central Alabama...
* Until 930 PM CDT.
* At 626 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Tuscaloosa, Northport, Holt, University Mall, McFarland Mall,
Bryant Denny Stadium, Tuscaloosa Amphitheater, University Of
Alabama Quad, Taylorville, Stillman College, Oliver Lock And Dam
and Cottondale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3326 8759 3314 8759 3314 8744 3326 8747
FLASH FLOOD...RADAR INDICATED
$$
32/JDavis3 follow-up statements
824
WGUS74 KBMX 312337
FFSBMX
Flash Flood Statement
National Weather Service Birmingham AL
637 PM CDT Fri Jul 31 2026
ALC125-010230-
/O.CON.KBMX.FF.W.0029.000000T0000Z-260801T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tuscaloosa AL-
637 PM CDT Fri Jul 31 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM CDT THIS
EVENING FOR SOUTH CENTRAL TUSCALOOSA COUNTY...
At 637 PM CDT, local law enforcement reported thunderstorms producing
heavy rain across the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Law enforcement reported.
IMPACT...Life threatening flash flooding of creeks and streams, urban
areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Tuscaloosa, Northport, Holt, University Mall, McFarland Mall,
Bryant Denny Stadium, Tuscaloosa Amphitheater, University Of
Alabama Quad, Taylorville, Stillman College, Oliver Lock And Dam
and Cottondale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3326 8759 3314 8759 3314 8744 3326 8747
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
32/JDavis530
WGUS74 KBMX 010058
FFSBMX
Flash Flood Statement
National Weather Service Birmingham AL
758 PM CDT Fri Jul 31 2026
ALC125-010230-
/O.CON.KBMX.FF.W.0029.000000T0000Z-260801T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tuscaloosa AL-
758 PM CDT Fri Jul 31 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM CDT THIS
EVENING FOR SOUTH CENTRAL TUSCALOOSA COUNTY...
At 758 PM CDT, heavy rainfall has ended but some lingering areas of
flooding remain.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Tuscaloosa, Northport, Holt, University Mall, McFarland Mall,
Bryant Denny Stadium, Tuscaloosa Amphitheater, University Of
Alabama Quad, Taylorville, Stillman College, Oliver Lock And Dam
and Cottondale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3326 8759 3314 8759 3314 8744 3326 8747
FLASH FLOOD...OBSERVED
$$
32/JDavis616 WGUS74 KBMX 010149 FFSBMX Flash Flood Statement National Weather Service Birmingham AL 849 PM CDT Fri Jul 31 2026 ALC125-010159- /O.CAN.KBMX.FF.W.0029.000000T0000Z-260801T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Tuscaloosa AL- 849 PM CDT Fri Jul 31 2026 ...FLASH FLOOD WARNING IS CANCELLED FOR SOUTH CENTRAL TUSCALOOSA COUNTY... The heavy rain has ended. Flood waters are receding. Some minor flooding of poor drainage areas remains. Please continue to heed remaining road closures. && LAT...LON 3326 8759 3314 8759 3314 8744 3326 8747 $$ 32/JDavis
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Birmingham, AL wrote its last area forecast discussion before this flash flood warning went out at Jul 31, 1:42 PM CDT, 4 hours 44 minutes earlier. Its key messages:
- Issued at 141 PM CDT FRI JUL 31 2026
- Severe Weather: There is a level 1 out of 5 risk for severe thunderstorms across northern and western parts of Alabama on Saturday afternoon and evening. The main threat will be damaging straight-line winds.
- Heavy Rain: Confidence is increasing in the potential for heavy rainfall this weekend as moisture pools ahead of an incoming boundary.
Area forecast discussion, Jul 31, 1:42 PM CDT, 4 hours 44 minutes before
Area Forecast Discussion National Weather Service Birmingham AL 142 PM CDT Fri Jul 31 2026 ...New DISCUSSION, AVIATION... .KEY MESSAGES... Issued at 141 PM CDT FRI JUL 31 2026 - Severe Weather: There is a level 1 out of 5 risk for severe thunderstorms across northern and western parts of Alabama on Saturday afternoon and evening. The main threat will be damaging straight-line winds. - Heavy Rain: Confidence is increasing in the potential for heavy rainfall this weekend as moisture pools ahead of an incoming boundary. && .DISCUSSION... (This afternoon through Thursday) Issued at 141 PM CDT FRI JUL 31 2026 Scattered cloud cover has developed this afternoon, with a growing cumulus field along and south of a stalled boundary, from Troy to Tuscaloosa to Hamilton. Guidance continues to indicate the development of some showers and storms later this afternoon and into the evening generally along this boundary. However, overall coverage is expected to be low. By tomorrow, very high precipitable water (PWAT) values of >2.2-2.3" will advance northward into the warm sector of an approaching trough across the Central U.S.. A surface low currently over Iowa will move over Illinois by tomorrow, driving a cold front into the region tomorrow evening. Models are indicating a morning round of generally sub-severe showers and storms to sweep through the area between 7 am and noon, followed by the potential for a line of strong to severe thunderstorms to move across the Ohio and Tennessee valleys and southward, ahead of the front. This will bring mainly a damaging wind threat to Central Alabama starting during the mid-afternoon hours and lasting toward midnight. A level 1 Marginal risk has been introduced for many of the counties in the northern and western part of our area. With high PWATs, very heavy rainfall may occur with passing thunderstorms. However, overall rain amounts currently do not look to be enough to cause widescale flooding concerns. Additional afternoon thunderstorm development is currently forecast for Sunday afternoon across eastern Central Alabama as the entire system advances to the east. No severe threat has been introduced as of this forecast cycle. The aforementioned trough will get left behind in the upper Ohio Valley by the start of the week, becoming a cutoff low that will have some effects on Central Alabama. Namely, low to medium rain chances will be maintained each afternoon through next week, predominantly across eastern Central Alabama, in association with the upper low to the north. Additionally, we will see a bit of a break in high temperatures early to mid week, with highs in the upper 80s to low 90s. A ridge will then begin to build in from the west by late next week, with afternoon highs climbing back into the low to mid 90s. 12 && .AVIATION... (18Z TAFS) Issued at 141 PM CDT FRI JUL 31 2026 Mostly VFR conditions are expected through the rest of the day and into the early overnight, with scattered cloud cover currently observed on satellite across southern and western areas. Hazy conditions are being observed at EET and TCL due to wildfire smoke, causing slight reductions in vis. Some shower and storm activity remains supported by models this evening, so PROB30s have been maintained this afternoon/evening for MGM and TCL. A warm, moist airmass will advect in from the southwest, bringing lower cigs into much of the region by early tomorrow morning. Guidance currently suggests cigs dropping to MVFR by 09- 10z and IFR by 11-12z. AUO, MGM, and EET will likely see the most time at IFR. TCL and BHM will remain at MVFR for most of the time, especially TCL, where IFR cigs were not included with this issuance. MVFR cigs may persist at all sites through late morning. A morning round of rain and storms will develop by/after 13z and sweep eastward. This should clear out by midday and has been included on the TAF for each site. Note: AMD NOT SKED for KAUO due to a weather observation outage. 12 && .FIRE WEATHER... A warm and humid air mass will help keep fire weather concerns in check for the week. MinRH values are expected to remain above 45 percent through Wednesday. Rain is expected at times over the weekend. Some drier air begins to work in from the east by next Thursday and Friday with RHs dropping to around 40%. However, winds will be light enough to negate any fire weather concerns. && .PRELIMINARY POINT TEMPS/POPS... Gadsden 73 89 71 87 / 30 80 80 30 Anniston 72 86 71 86 / 30 80 80 30 Birmingham 74 88 71 86 / 40 70 70 20 Tuscaloosa 74 90 71 87 / 40 50 60 10 Calera 73 88 71 87 / 40 60 80 20 Auburn 74 83 73 86 / 20 80 70 50 Montgomery 74 88 73 89 / 30 60 70 30 Troy 73 85 72 87 / 30 70 60 50 && .BMX WATCHES/WARNINGS/ADVISORIES... None. && DISCUSSION...12 AVIATION...12
In the hours before
Special weather statement, Jul 31, 5:01 PM CDT, 1 hour 25 minutes before
Special Weather Statement
National Weather Service Birmingham AL
501 PM CDT Fri Jul 31 2026
ALZ012-022-312300-
Pickens AL-Lamar AL-
501 PM CDT Fri Jul 31 2026
...STRONG THUNDERSTORMS WILL IMPACT NORTHERN PICKENS AND SOUTHERN
LAMAR COUNTIES THROUGH 600 PM CDT...
At 501 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Columbus AFB to near Ethelsville. Movement
was east at 10 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Vernon, Millport, Kennedy, Ethelsville, Ashcraft Corner, Bedford,
Lamar County Public Lake, Shaw, Star, Hightogy, Forest, Macedonia,
and Melborne.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3382 8824 3383 8823 3357 8795 3353 8795
3353 8790 3347 8784 3335 8830
TIME...MOT...LOC 2201Z 250DEG 11KT 3364 8846 3341 8813
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
05Special weather statement, Jul 31, 5:35 PM CDT, 51 minutes before
Special Weather Statement
National Weather Service Birmingham AL
535 PM CDT Fri Jul 31 2026
ALZ050-312300-
Barbour AL-
535 PM CDT Fri Jul 31 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN BARBOUR COUNTY
THROUGH 600 PM CDT...
At 535 PM CDT, Doppler radar was tracking a strong thunderstorm near
Richards Crossroads, or 9 miles southwest of Eufaula. This
thunderstorm was nearly stationary.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Eufaula, Richards Crossroads, Osco, Gaino, and Baker Hill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3171 8534 3187 8535 3190 8511 3189 8513
3188 8513 3186 8514 3179 8513 3178 8514
3176 8513 3177 8515 3175 8518 3174 8521
3171 8521 3170 8522
TIME...MOT...LOC 2235Z 276DEG 1KT 3178 8525
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
05Special weather statement, Jul 31, 5:46 PM CDT, 40 minutes before
Special Weather Statement
National Weather Service Birmingham AL
546 PM CDT Fri Jul 31 2026
ALZ023-312315-
Tuscaloosa AL-
546 PM CDT Fri Jul 31 2026
...STRONG THUNDERSTORMS WILL IMPACT SOUTHWESTERN TUSCALOOSA COUNTY
THROUGH 615 PM CDT...
At 546 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles northeast of Gordo to near Coker to
near Moundville. Movement was east at 15 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Southwestern Tuscaloosa, Northport, Moundville, Coker, Lake Lurleen
State Park, Shelton State Community College, Tuscaloosa Amphitheater,
Bryant Denny Stadium, Tuscaloosa National Airport, Englewood, Ralph,
Little Sandy, Flatwoods, Maxwell, Fosters Boat Landing, Hull,
Stillman College, Echola, Oliver Lock And Dam, and Elrod.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3342 8784 3346 8769 3331 8757 3301 8751
3301 8771 3302 8777 3302 8783
TIME...MOT...LOC 2246Z 256DEG 12KT 3336 8781 3327 8773 3301 8770
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
32/JDavisSpecial weather statement, Jul 31, 5:59 PM CDT, 27 minutes before
Special Weather Statement
National Weather Service Birmingham AL
559 PM CDT Fri Jul 31 2026
ALZ049-050-312330-
Pike AL-Barbour AL-
559 PM CDT Fri Jul 31 2026
...A STRONG THUNDERSTORM WILL IMPACT EAST CENTRAL PIKE AND
SOUTHWESTERN BARBOUR COUNTIES THROUGH 630 PM CDT...
At 559 PM CDT, Doppler radar was tracking a strong thunderstorm near
Clio. This thunderstorm was nearly stationary.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Clio, Louisville, Boot Hill, Monticello, and Josie.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3172 8578 3187 8579 3188 8557 3167 8558
TIME...MOT...LOC 2259Z 266DEG 2KT 3175 8567
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
32/JDavisSpecial weather statement, Jul 31, 6:03 PM CDT, 23 minutes before
Special Weather Statement
National Weather Service Birmingham AL
603 PM CDT Fri Jul 31 2026
ALZ023-312330-
Tuscaloosa AL-
603 PM CDT Fri Jul 31 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL TUSCALOOSA COUNTY
THROUGH 630 PM CDT...
At 603 PM CDT, Doppler radar was tracking a strong thunderstorm over
southeastern Tuscaloosa. This thunderstorm was nearly stationary.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Tuscaloosa, Northport, Holt, Coaling, McFarland Mall, Shelton State
Community College, Tuscaloosa Amphitheater, Bryant Denny Stadium,
Lake Wildwood, University Mall, Deerlick Creek Campgrounds,
Tuscaloosa National Airport, Englewood, Cottondale, Little Sandy,
Maxwell, Peterson, Lake Harris, Hull, and Hagler.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3331 8741 3304 8732 3301 8732 3300 8746
3301 8758 3323 8763
TIME...MOT...LOC 2303Z 328DEG 4KT 3320 8753
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
32/JDavisSpecial weather statement, Jul 31, 6:23 PM CDT, 3 minutes before
Special Weather Statement
National Weather Service Birmingham AL
623 PM CDT Fri Jul 31 2026
ALZ023-034-010030-
Bibb AL-Tuscaloosa AL-
623 PM CDT Fri Jul 31 2026
...STRONG THUNDERSTORMS WILL IMPACT SOUTHEASTERN TUSCALOOSA AND
WESTERN BIBB COUNTIES THROUGH 730 PM CDT...
At 623 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Deerlick Creek Campgrounds to near Mertz.
Movement was east at 10 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Eastern Tuscaloosa, Brent, Centreville, Holt, Brookwood, Coaling,
Vance, West Blocton, Abernant, West Centreville, Lake Wildwood,
Deerlick Creek Campgrounds, Low Gap, Mertz, Eoline, Mercedes Benz Of
Alabama, North Bibb, Cottondale, East Brookwood, and Peterson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3332 8754 3339 8723 3337 8723 3337 8722
3336 8721 3336 8720 3290 8707 3286 8732
3287 8732 3287 8741 3288 8742 3300 8742
3300 8746
TIME...MOT...LOC 2323Z 262DEG 11KT 3329 8745 3294 8736
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
05The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 5:01 PM CDT | Special Weather Statement | BMX | Lamar | 59 min |
| Jul 31, 5:35 PM CDT | Special Weather Statement | BMX | Barbour | 25 min |
| Jul 31, 5:46 PM CDT | Special Weather Statement | BMX | Tuscaloosa | 29 min |
| Jul 31, 5:59 PM CDT | Special Weather Statement | BMX | Pike | 31 min |
| Jul 31, 6:03 PM CDT | Special Weather Statement | BMX | Tuscaloosa | 27 min |
| Jul 31, 6:09 PM CDT | Areal Flood Advisory | BMX | Tuscaloosa | 3 hr |
| Jul 31, 6:23 PM CDT | Special Weather Statement | BMX | Bibb, Tuscaloosa | 67 min |
| Jul 31, 6:39 PM CDT | Special Weather Statement | BMX | Bibb | 36 min |
| Jul 31, 6:49 PM CDT | Special Weather Statement | BMX | Bibb | 26 min |
| Jul 31, 6:57 PM CDT | Special Weather Statement | BMX | Bibb | 33 min |
Nearby
Flash Flood Warnings in Alabama, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.