Alert archive / Maryland / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 86, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 30, 2001, 4:54 PM EDT for Anne Arundel County, Maryland. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 30, 2001, 4:54 PM EDT (20:54 UTC)
- Expired
- Jun 30, 2001, 5:45 PM EDT
- In force
- 51 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
County Anne Arundel County, MD
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.9 hours before the alert went out and 72 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
- 1110 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 1211 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 2:35 PM EDT, 2 hours 19 minutes earlier.
Area forecast discussion, Jun 30, 2:35 PM EDT, 2 hours 19 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 235 PM EDT SAT JUN 30 2001 HEAT ADVSRY CURRENTLY IN EFFECT SEEMS TO BE VERIFYING - 2 PM ROUND-UP SHOWS SVRL STATIONS ARND 98 DEGS FOR HEAT INDEX VALUES. AS ANTICIPATED SCT CONVECTION IS FIRING. HOWEVER A FOCUS IS LACKING FOR AN ORGANIZED LINE. EVEN SO FEEL SOME CELLS COULD GO SVR WITH CAPES OVER 3000 THIS AFTN. CURRENT VWP SHOWS A FLOW FM THE WSW ARND 10 KTS. THIS CORRESPONDS WITH CELL MVMNT. FCST WL HAVE SCT CONVECTION INTO THE EVENG HRS...THEN PC AND CONT WARM OVRNGT. FOR TMRW AM UNSURE OF NEED FOR ANOTHER HEAT ADVSRY - FOR ONE THING TMRW IS JULY...AND ON JUL 1 MIN REQUIREMENT RISES FM 98 TO 100. TMRW AFTN AND EVE COULD BE INTERESTING - ALL MDLS IN AGREEMENT ON MVMNT OF CD FNT SWD ACROSS PA ON SUN AFTN. SPC HAS ERN PA IN MDT RISK...AND NRN HALF OF OUR CWA IN SLGT RISK. FOR NOW WL GO WITH A 50 POP ACROSS THE NRN HALF OF THE AREA SUN AFTN...40 POP S. WL KEEP A CHC IN FOR SUN EVENG. MON LOOKS LIKE A PLEASNT CHG TO THE PAST SVRL DAYS. DCA 75 92 65 79 / 30 50 40 10 BWI 72 90 63 77 / 30 50 40 0 MRB 68 91 62 76 / 30 50 30 0 IAD 69 90 63 77 / 30 50 40 0 CHO 69 92 64 80 / 30 40 40 10 HGR 68 91 62 76 / 30 50 30 0 NHK 73 92 64 80 / 30 40 40 10 W99 65 89 59 73 / 30 50 30 0 .LWX... DC...NONE. MD...NONE. VA...NONE. W2V...NONE. WOODY!
In the hours before
Special weather statement, Jun 30, 4:23 PM EDT, 31 minutes before
MDZ009-VAZ042-302115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 423 PM EDT SAT JUN 30 2001 ...STRONG THUNDERSTORMS MOVING THROUGH THE WESTERN DC SUBURBS... AT 420 PM EDT... RADAR INDICATED A STRONG THUNDERSTORM JUST TO THE SOUTH OF LEESBURG VIRGINIA. THIS STORM WAS MOVING TO THE EAST AT 15 MPH. AND WILL MOVE INTO WESTERN MONTGOMERY COUNTY MARYLAND AFTER 430 PM. PERSONS IN THE COMMUNITIES OF LEESBURG... POOLESVILLE AND GERMANTOWN SHOULD TAKE SHELTER AS THIS STORM APPROACHES. THE THUNDERSTORM WILL BE CAPABLE OF PRODUCING SMALL HAIL... WINDS IN EXCESS OF 35 MPH... AND FREQUENT LIGHTNING. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. MARGRAF!
Special weather statement, Jun 30, 4:34 PM EDT, 20 minutes before
DCZ001-MDZ009-010-013-VAZ053-054-302130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 434 PM EDT SAT JUN 30 2001 ...STRONG THUNDERSTORMS MOVING THROUGH THE WASHINGTON METRO AREA... AT 430 PM EDT... RADAR INDICATED STRONG THUNDERSTORMS EXTENDING FROM GREAT FALLS VIRGINIA TO WHEATON MARYLAND. THIS CLUDTER OF STORMS IS MOVING EAST AT 15 MPH. THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL... WINDS IN EXCESS OF 40 MPH... HEAVY DOWNPOURS AND FREQUENT LIGHTNING. PERSONS LIVING IN WASHINGTON DC... FAIRFAX COUNTY VIRGINIA... AND MONTGOMERY AND PRINCE GEORGES COUNTIES IN MARYLAND SHOULD PREPARE TO TAKE SHELTER INSIDE WHEN STORMS APPROACH. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. MARGRAF
Special weather statement, Jun 30, 4:34 PM EDT, 20 minutes before
DCZ001-MDZ009-010-013-VAZ053-054-302130- SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 434 PM EDT SAT JUN 30 2001 ...STRONG THUNDERSTORMS MOVING THROUGH THE WASHINGTON METRO AREA... AT 430 PM EDT... RADAR INDICATED STRONG THUNDERSTORMS EXTENDING FROM GREAT FALLS VIRGINIA TO WHEATON MARYLAND. THIS CLUSTER OF STORMS IS MOVING EAST AT 15 MPH. THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL... WINDS IN EXCESS OF 40 MPH... HEAVY DOWNPOURS AND FREQUENT LIGHTNING. PERSONS LIVING IN WASHINGTON DC... FAIRFAX COUNTY VIRGINIA... AND MONTGOMERY AND PRINCE GEORGES COUNTIES IN MARYLAND SHOULD PREPARE TO TAKE SHELTER INSIDE WHEN STORMS APPROACH. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. MARGRAF
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 3:32 PM EDT | Severe Thunderstorm Warning | LWX | Fauquier, Prince William | 43 min |
| Jun 30, 5:13 PM EDT | Severe Thunderstorm Warning | LWX | Jefferson | 32 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2001Every severe thunderstorm warning in 2001
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.