Alert archive / Maryland / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 101, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 5, 2001, 5:20 PM EDT for Prince George's County, Maryland. It was in force for 40 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
- Jul 5, 2001, 5:20 PM EDT (21:20 UTC)
- Expired
- Jul 5, 2001, 6:00 PM EDT
- In force
- 40 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
County Prince George's County, MD
The radar
The Sterling radar (KLWX), 58 km from the middle of the area, began a volume at 21:20 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.3 hours before the alert went out and 50 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
- 9 J/kg
- Mixed-layer CIN
- -165 J/kg
- Mixed-layer LCL
- 1085 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KLWX 052119 SVRLWX DCC001-MDC033-052200- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 520 PM EDT THU JUL 5 2001 THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... DISTRICT OF COLUMBIA IN DISTRICT OF COLUMBIA PRINCE GEORGES COUNTY IN CENTRAL MARYLAND * UNTIL 600 PM EDT * AT 515 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER CORAL HILLS...MOVING EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE... 5 MILES NORTH OF ANDREWS AFB AT 524 PM OVER LARGO...4 MILES SOUTH OF MITCHELLVILLE AT 526 PM OVER KETTERING AT 530 PM 7 MILES SOUTH OF BOWIE AT 534 PM 3 MILES NORTH OF UPPER MARLBORO AT 536 PM REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL... DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. IF SEVERE WEATHER APPROACHES...GO INSIDE A STURDY SHELTER AND STAY AWAY FROM DOORS AND WINDOWS. TUNE INTO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR THE LATEST WEATHER INFORMATION.
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 Jul 5, 2:35 PM EDT, 2 hours 45 minutes earlier.
Area forecast discussion, Jul 5, 2:35 PM EDT, 2 hours 45 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 235 PM EDT THU JUL 5 2001 PATTERN ACRS THE COUNTRY WILL BE DOMINATED BY AN UPR LVL TROF OVR THE ERN U.S. AND UPR LVL RDG OVR THE ROCKIES AND PLAIN STATES. BY SAT...THE UPR LVL TROF WILL BEGIN TO LIFT OUT AS THE CUTOFF LOW OVR QUEBEC BEGINS TO MOVE NE. THIS WILL RESULT IN RISING HGTS OVR THE AREA BY SAT. HOWEVER...BY SUN...ANOTHER PIECE OF ENERGY DROPS INTO THE LONGWAVE TROF POSITION ALG THE E COAST...REINFORCING THE TROF. SFC CDFNT WILL MOVE THRU THE AREA THIS EVE. DON'T EXPECT WIDESPREAD CONVECTION ALG OR AHD OF THE CDFNT. SOUNDINGS SHOW A WEAK CAP OVR THE AREA. WINDS WILL NOT BE BACKING MUCH AHD OF THE CDFNT SO CONVERGENCE IS WEAK. IN ADDITION...ALL THE DEEP MOISTURE HAS BEEN SWEPT E OF THE AREA WITH THE SFC TROF LEAVING ONLY SOME RESIDUAL SHALLOW MOISTURE OVR THE AREA. ALSO...WESTERLY FLOW AHD OF THE CDFNT WILL RESULT IN DOWNSLOPING WHICH WILL TEND TO SUPPRESS CONVECTION. HOWEVER...MODIFIED SOUNDING SHOWS A CAPE OF 1300 THIS EVE WITH LIS AROUND MINUS 4. IN ADDITION...THE 12Z ETA AND NGM BOTH SHOW SOME QPF OVR THE AREA. WILL LEAVE 30 POPS IN THE FCST UNTIL MIDNIGHT THEN P/C. SFC HIGH PRES BUILDS INTO THE AREA FRI AND FRI NIGHT WITH A COOL AND DRY AIR MASS. GOING WITH SUNNY SKIES FRI AND CLR FRI NIGHT. SFC HIGH MOVES OFF THE CST SAT AND RETURN S FLOW DEVELOPS BRINGING SOME MOISTURE BACK INTO THE AREA. IN ADDITION...AS HGTS START TO RISE OVR THE AREA...WHATS LEFT OF THE FNT TO OUR S WILL MOVE BACK N AS A WEAK WMFNT. ETA DEVELOPS SOME UVVS OVR THE AREA LATE SAT IN ASSOCIATION WITH THE RETURN FLOW/WMFNT. THE AVN KEEPS THE UVVS NW OF THE AREA. THINK THE ETA MAY BE OVERDOING THE UVVS AND MOISTURE SO RIGHT NOW WILL ONLY HAVE HIDDEN 20 POPS IN FOR SAT AND HOLD OFF ON MENTIONING ANY SHRAS/TSRAS UNTIL SAT NIGHT. NGM AND AVN MOS NUMBERS ARE CLOSE THE 1ST 3 PDS. HOWEVER...THE MOS HAS BEEN RUNNING TOO WARM LATELY WHEN WE GET A COOL DRY AIR MASS INTO THE AREA. WILL UNDERCUT MOS TEMPS A COUPLE DEGREES ON FRI. NGM MOS IS WARMER THAN THE AVN MOS FOR SAT. WENT WITH A COMPROMISE BETWEEN THE TWO SETS OF NUMBERS SAT. FOR THE EXTENDED... THE AVN HAS A CDFNT MOVING THRU THE AREA ON SUN AS THE NEXT SHORTWAVE DROPS INTO THE TROF POSITION. WILL HAVE CHC POPS SUN FOR SHRA/TSRA. HIGH PRES BUILDS INTO THE AREA MON/TUE WITH DRIER AIR MASS. FCSTID = 15 / DMW DCA 63 81 63 87 / 30 0 0 20 BWI 58 80 56 87 / 30 0 0 20 MRB 54 80 52 87 / 30 0 0 20 IAD 54 80 52 87 / 30 0 0 20 CHO 58 81 59 87 / 30 0 0 20 HGR 52 79 51 86 / 30 0 0 20 NHK 6U4 81 63 87 / 30 0 0 20 W99 48 78 47 85 / 30 0 0 20 .LWX... DC...NONE. MD...NONE. VA...NONE. WV...NONE.
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 3:48 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 27 min |
| Jul 5, 5:32 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 28 min |
| Jul 5, 6:21 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard | 39 min |
| Jul 5, 6:45 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 60 min |
| Jul 5, 6:57 PM EDT | Tornado Warning | LWX | Baltimore, City of Baltimore | 33 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2001Severe Thunderstorm Warnings in District of Columbia, 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; radar from the NEXRAD Level II archive.