Alert archive / Alabama / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 122, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Jun 11, 2011, 5:14 PM CDT for Escambia County, Alabama; Escambia County, Florida. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 11, 2011, 5:14 PM CDT (22:14 UTC)
- Expired
- Jun 11, 2011, 5:45 PM CDT
- In force
- 31 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
Counties Escambia County, AL, Escambia County, FL
The radar
The Mobile radar (KMOB), 87 km from the middle of the area, began a volume at 22:14 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
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
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.2 hours before the alert went out and 234 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
- 1164 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
852 WUUS54 KMOB 112214 SVRMOB ALC053-FLC033-112245- /O.NEW.KMOB.SV.W.0122.110611T2214Z-110611T2245Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 514 PM CDT SAT JUN 11 2011 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN ESCAMBIA COUNTY IN NORTHWEST FLORIDA... WESTERN ESCAMBIA COUNTY IN SOUTH CENTRAL ALABAMA... THIS INCLUDES THE CITY OF ATMORE... * UNTIL 545 PM CDT * AT 509 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 8 MILES NORTH OF ATMORE TO ATMORE...AND MOVING SOUTHWEST AT 5 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... I65 AND AL 21 THROUGH 530 PM CDT... ATMORE...CARNEY...I65 AND CR 1 AND OAK GROVE AROUND 545 PM CDT... THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 50 AND 64. && LAT...LON 3125 8739 3094 8733 3081 8755 3114 8761 TIME...MOT...LOC 2214Z 056DEG 3KT 3114 8747 3098 8743 $$
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Mobile, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 11, 3:54 PM CDT, 1 hour 20 minutes earlier.
Area forecast discussion, Jun 11, 3:54 PM CDT, 1 hour 20 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOBILE AL 354 PM CDT SAT JUN 11 2011 .SHORT TERM [TONIGHT THROUGH MONDAY NIGHT]...NAM AND GFS SOUNDINGS INDICATE LINGERING AFTERNOON AND EARLY EVENING THUNDERSTORMS COULD BRING STRONG GUSTY WIND AS OUTFLOW GUSTS FROM 35-45 MPH AND SMALL HAIL. CANNOT RULE OUT A FEW BECOMING BRIEFLY SEVERE WITH DAMAGING STRAIGHT LINE WINDS IN EXCESS OF 60 MPH AND/OR SMALL HAIL. TODAY'S 12Z MOS TEMPERATURE GUIDANCE APPEARS TO HAVE GOTTEN NEAR ZERO BIAS ON DAYTIME HIGHS AND GIVEN LITTLE CHG IN THE ENVIRONMENT TODAY...WILL LEAN TO MOS FOR THE MOMENT. POPS LOOK RATHER LOW FOR THE MESOSCALE SITUATION SO WE RAISED THEM BY ABOUT 20 TO 30 PERCENT FOR THE SEABREEZE AND THAT HELPS MATCH NEIGHBORS AS WELL. /77 .LONG TERM [TUESDAY THROUGH FRIDAY]...NO CHANGES. AN UPPER TROUGH SITUATED FROM THE SOUTHWEST GULF OF MEXICO TO THE WESTERN ATLANTIC WILL MOVE SOUTHEAST THROUGH MIDWEEK. AN UPPER HIGH BUILDING OVER THE SOUTHERN PLAINS WILL PUSH INTO THE NORTHEAST GULF AND A STRONG UPPER LOW MOVES OFF NOVA SCOTIA INTO THE GRAND BANKS. IT SHOWS A SMALL PROPENSITY TO DRAG A FRONT THROUGH THIS AREA ACCOMPANIED BY A WEAK SURFACE HIGH IN THE NORTH CENTRAL GULF. ANOTHER COLD FRONT APPROACHING THE FORECAST AREA FROM THE NORTH OVERNIGHT FRIDAY MOVES INTO THE FORECAST AREA ON SUNDAY AND THEN STALLS. /77 WILL KEEP ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS IN THE FORECAST THROUGH ALL FORECAST PERIODS...MAINLY DURING THE AFTERNOON AND EARLY EVENING HOURS. PRECIPITABLE WATER OVER THE AREA REMAINING BETWEEN 1.5 AND 2.0 INCHES THROUGH THE PERIOD SUGGEST THAT SOME OF THE THUNDERSTORMS WILL BRING PERIODS OF LOCALLY HEAVY RAIN ESPECIALLY SINCE STORM MOTION IS EXPECTED TO BE LESS THEN 15 MPH. NO CHANGES TO TEMPERATURES WE HAVE. HIGHS CONTINUE ABOVE NORMAL...REACHING THE MID 90S INLAND AREAS AND LOWER 90S COASTAL SECTIONS. LOW TEMPERATURES EACH NIGHT WILL FALL INTO THE UPPER 60S TO LOWER 70S INLAND AREAS AND THE MID 70S COASTAL SECTIONS. && .AVIATION (11/18Z AND 12/00Z TAF ISSUANCES)...CB FCST WITH TSRA IN THE VCTY INTO THE EARLY EVENING HOURS...WITH TEMPO IFR CONDITIONS FOR TSTMS AT TAF SITES LATE THIS AFTERNOON AND EARLY EVENING. AS TSTMS WEAKEN AFT 010Z THIS EVENING...CIG BASES BECOME OF THE MID/LVL VARIETY WITH WINDS LGT TONIGHT. SUNDAY MUCH OF THE SAME AS PATTERN REMAINS UNCHANGED. 12/DS && .MARINE...WEAK HIGH PRESSURE WILL CONTINUE OVER THE NORTHERN GULF INTO THE EARLY PART OF NEXT WEEK...WHILE A WEAK TROUGH OF LOW PRESSURE PERSISTS JUST INLAND OVER THE SOUTHEASTERN STATES. THIS WILL RESULT IN A CONTINUED LIGHT WIND FLOW OVER THE MARINE AREA INTO THE EARLY PART OF NEXT WEEK...WITH A SOUTHWESTERLY DIRECTION BEING THE PRIMARY DIRECTION. LITTLE CHANGE IN SEAS EXPECTED. 12/DS && .FIRE WEATHER...HIGHS IN THE LOW TO MID 90S AND DEEP MIXING...WITH MIXING HEIGHT EXCEEDING 10000 FEET AND DISPERSION EXCEEDING 120...WILL BRING DRY AIR ALOFT MIXING DOWN TO THE SURFACE SUNDAY AFTERNOON. SUNDAY AFTERNOON RH WILL THEREFORE BE IN THE UPPER 30S AWAY FROM THE COAST BUT HIGHER NEAR SHORE DUE TO DEVELOPING CONVECTION ALONG THE AFTERNOON SEA BREEZE. ISOLATED SHOWERS AND THUNDERSTORMS LATE IN THE MORNING BECOMING SCATTERED IN THE AFTERNOON AND EARLY EVENING. && .PRELIMINARY POINT TEMPS/POPS... MOBILE 69 94 73 95 / 30 30 10 30 PENSACOLA 72 93 78 95 / 20 30 10 30 DESTIN 79 91 78 90 / 20 30 10 30 EVERGREEN 66 97 69 98 / 30 40 10 30 WAYNESBORO 65 97 68 97 / 30 30 10 05 CAMDEN 65 97 69 98 / 30 20 10 10 CRESTVIEW 68 96 70 98 / 20 40 10 30 && .MOB WATCHES/WARNINGS/ADVISORIES... AL...NONE. FL...NONE. MS...NONE. GM...NONE. &&
Hazardous weather outlook, Jun 11, 4:43 PM CDT, 31 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MOBILE AL 443 PM CDT SAT JUN 11 2011 ALZ051>064-FLZ001>006-GMZ630-650-655-670-675-MSZ067-075-076-078- 079-122145- CHOCTAW-WASHINGTON-CLARKE-WILCOX-MONROE-CONECUH-BUTLER-CRENSHAW- ESCAMBIA-COVINGTON-UPPER MOBILE-UPPER BALDWIN-LOWER MOBILE- LOWER BALDWIN-INLAND ESCAMBIA-COASTAL ESCAMBIA-INLAND SANTA ROSA- COASTAL SANTA ROSA-INLAND OKALOOSA-COASTAL OKALOOSA-MOBILE BAY- COASTAL WATERS FROM PENSACOLA FL TO PASCAGOULA MS OUT 20 NM- COASTAL WATERS FROM DESTIN TO PENSACOLA FL OUT 20 NM- WATERS FROM PENSACOLA FL TO PASCAGOULA MS FROM 20 TO 60 NM- WATERS FROM DESTIN TO PENSACOLA FL FROM 20 TO 60 NM-WAYNE-PERRY- GREENE-STONE-GEORGE- 443 PM CDT SAT JUN 11 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF INTERIOR SOUTHEAST MISSISSIPPI...SOUTHWEST AND SOUTH CENTRAL ALABAMA...THE WESTERN FLORIDA PANHANDLE AND THE ADJACENT GULF COASTAL WATERS OF ALABAMA AND NORTHWEST FLORIDA. .DAY ONE...THROUGH TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS MAINLY OVER SOUTH CENTRAL ALABAMA AND THE INTERIOR NORTHWEST FLORIDA PANHANDLE ARE EXPECTED TO MOVE SOUTHWESTWARD TO BE LOCATED MAINLY OVER SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI DURING THE EVENING HOURS. THE THUNDERSTORMS WILL WEAKEN DURING THE LATE EVENING HOURS AND DISSIPATE BY AROUND MIDNIGHT. GUSTY WINDS OF 35 TO 45 MPH AND SMALL HAIL WILL BE POSSIBLE WITH SOME OF THE STRONGER THUNDERSTORMS. HOWEVER...A FEW STORMS MAY BECOME SEVERE AND PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH AND HAIL TO THE SIZE OF QUARTERS. DUE TO THE SLOW MOVEMENT OF THE THUNDERSTORMS...LOCALLY HEAVY RAINFALL CAN ALSO BE EXPECTED WITH FREQUENT LIGHTNING ALSO A THREAT IN AND NEAR STORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A SMALL CHANCE OF THUNDERSTORMS WILL BE POSSIBLE EACH DAY THROUGH THE FORECAST PERIOD. SOME OF THE STORMS COULD BECOME STRONG...PRODUCING BRIEF STRONG WINDS GUSTS AND SMALL HAIL. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF SKYWARN SEVERE STORM SPOTTER NETWORKS IS NOT EXPECTED TO BE REQUIRED.
In the hours before
Special weather statement, Jun 11, 3:04 PM CDT, 2 hours 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 304 PM CDT SAT JUN 11 2011 ALZ056-057-112100- CONECUH AL-BUTLER AL- 304 PM CDT SAT JUN 11 2011 ...STRONG THUNDERSTORMS WILL AFFECT CONECUH AND SOUTHWESTERN BUTLER COUNTIES IN SOUTHWEST ALABAMA THROUGH 400 PM CDT... AT 252 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER SOUTHWEST BUTLER COUNTY ABOUT 10 MILES NORTHWEST OF GEORGIANA...OR 8 MILES NORTHWEST OF I65 AND AL 106... MOVING SOUTHWEST AT 10 MPH. THE STRONG THUNDERSTORM WILL BE NEAR... I65 AND AL 106 AROUND 310 PM CDT... I65 AND CR 7 AROUND 355 PM CDT... I65 AND CR 29 AROUND 400 PM CDT... THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 80 AND 115. ANOTHER STRONG THUNDERSTORM WAS LOCATED OVER CONECUH COUNTY JUST TO THE SOUTH OF EVERGREEN. THIS STORM ALSO MOVING SOUTHWEST AT 10 MPH. THIS STRONG THUNDERSTORM WILL BE NEAR... JAY VILLA AROUND 310 PM CDT... I65 AND CR 6 AROUND 330 PM CDT... THE PRIMARY THREATS FROM THESE STORMS ARE WIND GUSTS UP TO 50 MPH. WINDS THIS STRONG COULD BLOW OFF TREE LIMBS AND ALSO BLOW AROUND SMALL UNSECURED OBJECTS. SEEK SHELTER UNTIL THIS STORM HAS PASSED. SMALL HAIL IS ALSO POSSIBLE WITH THESE STORMS. THESE STORMS MAY CONTINUE TO INTENSIFY AND A WARNING MAY SOON BE NEEDED. PLEASE CONTINUE TO MONITOR LOCAL RADIO OR TV FOR FURTHER NATIONAL WEATHER SERVICE UPDATES OR POSSIBLE WARNINGS. &&
Special weather statement, Jun 11, 3:30 PM CDT, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 330 PM CDT SAT JUN 11 2011 FLZ005-006-112130- INLAND OKALOOSA FL-COASTAL OKALOOSA FL- 330 PM CDT SAT JUN 11 2011 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN OKALOOSA COUNTY IN NORTHWEST FLORIDA...THROUGH 430 PM CDT... AT 328 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 8 MILES SOUTHEAST OF CRESTVIEW...OR 14 MILES NORTH OF SEMINOLE...AND MOVING WEST AT 15 MPH. THE STRONG THUNDERSTORM WILL BE NEAR... HOLT AROUND 425 PM CDT... THIS INCLUDES INTERSTATE 10 BETWEEN MILE MARKERS 45 AND 66. THE PRIMARY THREATS FROM THIS STORM ARE WIND GUSTS UP TO 50 MPH. WINDS THIS STRONG COULD BLOW OFF TREE LIMBS AND ALSO BLOW AROUND SMALL UNSECURED OBJECTS. SEEK SHELTER UNTIL THIS STORM HAS PASSED. SMALL HAIL IS ALSO POSSIBLE WITH THIS STORM. &&
Special weather statement, Jun 11, 4:22 PM CDT, 52 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 422 PM CDT SAT JUN 11 2011 ALZ055-056-059-112200- ESCAMBIA AL-CONECUH AL-MONROE AL- 422 PM CDT SAT JUN 11 2011 ...A LINE OF STRONG THUNDERSTORMS WILL AFFECT WESTERN ESCAMBIA... SOUTHWESTERN CONECUH AND MONROE COUNTIES IN SOUTHWEST ALABAMA... THROUGH 500 PM CDT... AT 418 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF MONROEVILLE TO 8 MILES NORTH OF FLOMATON...AND MOVING SOUTHWEST AT 20 MPH. THESE STRONG THUNDERSTORMS WILL BE NEAR... MONROEVILLE...EXCEL AROUND 435 PM CDT... FRISCO CITY...VOCATION AROUND 450 PM CDT... VOCATION...I65 AND AL 21...HOLMAN PRISON AROUND 455 PM CDT... ATMORE...CARNEY...I65 AND CR 1 AROUND 500 PM CDT... THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 48 AND 76. THE PRIMARY THREATS FROM THESE STORMS ARE WIND GUSTS UP TO 50 MPH. WINDS THIS STRONG COULD BLOW OFF TREE LIMBS AND ALSO BLOW AROUND SMALL UNSECURED OBJECTS. SEEK SHELTER UNTIL THESE STORMS HAVE PASSED. SMALL HAIL IS ALSO POSSIBLE WITH THESE STORMS. &&
Local storm report, Jun 11, 5:00 PM CDT, 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
500 PM CDT SAT JUN 11 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0450 PM HAIL FINCHBURG 31.64N 87.51W
06/11/2011 E0.50 INCH MONROE AL FIRE DEPT/RESCUE
MARBLE SIZE HAIL REPORTED IN FOUNTAIN/FINCHBURG.
&&
GENEJSpecial weather statement, Jun 11, 5:01 PM CDT, 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 501 PM CDT SAT JUN 11 2011 ALZ055-112245- MONROE AL- 501 PM CDT SAT JUN 11 2011 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL MONROE COUNTY IN SOUTHWEST ALABAMA...THROUGH 545 PM CDT... AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR MONROEVILLE...OR 9 MILES WEST OF PETERMAN... AND MOVING SOUTHWEST AT 10 MPH. THE STRONG THUNDERSTORM WILL BE NEAR... FRISCO CITY AROUND 525 PM CDT... THE PRIMARY THREATS FROM THIS STORM ARE WIND GUSTS UP TO 50 MPH. WINDS THIS STRONG COULD BLOW OFF TREE LIMBS AND ALSO BLOW AROUND SMALL UNSECURED OBJECTS. SEEK SHELTER UNTIL THIS STORM HAS PASSED. SMALL HAIL IS ALSO POSSIBLE WITH THIS STORM. &&
Special weather statement, Jun 11, 5:02 PM CDT, 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 502 PM CDT SAT JUN 11 2011 ALZ054-112245- WILCOX AL- 502 PM CDT SAT JUN 11 2011 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL WILCOX COUNTY IN SOUTHWEST ALABAMA...THROUGH 545 PM CDT... AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 10 MILES EAST OF CAMDEN...OR 7 MILES WEST OF SNOW HILL...AND MOVING SOUTHWEST AT 10 MPH. THE STRONG THUNDERSTORM WILL BE NEAR... CAMDEN AROUND 545 PM CDT... THE PRIMARY THREATS FROM THIS STORM ARE WIND GUSTS UP TO 50 MPH. WINDS THIS STRONG COULD BLOW OFF TREE LIMBS AND ALSO BLOW AROUND SMALL UNSECURED OBJECTS. SEEK SHELTER UNTIL THIS STORM HAS PASSED. SMALL HAIL IS ALSO POSSIBLE WITH THIS STORM. &&
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 7:42 PM CDT | Severe Thunderstorm Warning | MOB | Covington | 48 min |
| Jun 10, 8:57 PM CDT | Severe Thunderstorm Warning | MOB | Crenshaw | 33 min |
| Jun 11, 4:12 PM CDT | Severe Thunderstorm Warning | MOB | Conecuh, Covington | 48 min |
| Jun 11, 4:17 PM CDT | Severe Thunderstorm Warning | MOB | Butler, Crenshaw | 43 min |
| Jun 11, 4:25 PM CDT | Severe Thunderstorm Warning | MOB | Conecuh, Escambia, Monroe | 50 min |
| Jun 11, 4:48 PM CDT | Severe Thunderstorm Warning | MOB | Escambia | 27 min |
| Jun 11, 4:54 PM CDT | Severe Thunderstorm Warning | MOB | Butler, Conecuh, Monroe, Wilcox | 36 min |
| Jun 11, 5:09 PM CDT | Severe Thunderstorm Warning | MOB | Wilcox | 36 min |
| Jun 11, 5:23 PM CDT | Severe Thunderstorm Warning | MOB | Butler, Conecuh, Monroe | 52 min |
| Jun 11, 5:37 PM CDT | Severe Thunderstorm Warning | MOB | Conecuh, Monroe, Wilcox | 38 min |
| Jun 11, 5:47 PM CDT | Areal Flood Advisory | MOB | Butler, Conecuh, Monroe, Wilcox | 118 min |
| Jun 11, 5:51 PM CDT | Areal Flood Advisory | MOB | Clarke, Monroe | 114 min |
| Jun 11, 6:12 PM CDT | Severe Thunderstorm Warning | MOB | Clarke, Monroe | 33 min |
| Jun 11, 6:40 PM CDT | Areal Flood Advisory | MOB | Clarke | 2 hr |
| Jun 11, 3:40 PM CDT | Severe Thunderstorm Warning | MOB | Okaloosa | 47 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2011Severe Thunderstorm Warnings in Florida, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.