Alert archive / Maryland / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 12, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Apr 9, 2001, 7:55 PM EDT for Harford County, Maryland. It was in force for 65 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 9, 2001, 7:55 PM EDT (23:55 UTC)
- Expired
- Apr 9, 2001, 9:00 PM EDT
- In force
- 65 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
County Harford County, MD
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 9, 8:20 PM EDT | Thunderstorm Wind | Countywide, MD | Scattered trees were downed. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 9, 7:00 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.9 hours before the alert went out and 19 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
- 1054 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Apr 9, 7:28 PM EDT, 27 minutes earlier.
Area forecast discussion, Apr 9, 7:28 PM EDT, 27 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 728 PM EDT MON APR 9 2001 QUICK ZN UPDATE FOR SVR TSTM WATCH ISSUED THRU MIDNIGHT. FCSTID = 13...PAP .LWX... DC...SVR $TSTM WATCH UNTIL MIDNIGHT. MD...SVR TSTM WATCH UNTIL MIDNIGHT EXCEPT ST MARYS COUNTY. VA...SVR TSTM WATCH UNTIL MIDNIGHT EXCEPT SOUTHERN TIER OF COUNTIES. WV...SVR TSTM WATCH UNTIL MIDNIGHT.
In the hours before
Special weather statement, Apr 9, 7:00 PM EDT, 55 minutes before
MDZ002>004-WVZ048>052-092300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 700 PM EDT MON APR 9 2001 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 12 AM... STRONG THUNDERSTORMS WILL BE MOVING INTO WESTERN MARYLAND AND THE EASTERN PANHANDLE OF WEST VIRGINIA BETWEEN 7 AND 9:30 THIS EVENING. SOME OF THESE STORMS MAY PRODUCE DAMAGING WINDS AND LARGE HAIL. STAY TUNED FOR LATER STATEMENTS AND POSSIBLE WARNINGS.f STRONG
Special weather statement, Apr 9, 7:49 PM EDT, 6 minutes before
MDZ005>007-009>011-VAZ028-031-042-WVZ048>050-055-090100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 749 PM EDT MON APR 9 2001 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL MIDNIGHT... STRONG THUNDERSTORMS WILL BE MOVING ACROSS NORTHERN MARYLAND AND THE EASTERN PANHANDLE OF WEST VIRGINIA BETWEEN 7:45 AND 9:30 THIS EVENING. SOME OF THESE STORMS MAY PRODUCE DAMAGING WINDS AND LARGE HAIL. STAY TUNED FOR LATER STATEMENTS AND POSSIBLE WARNINGS. STRONG
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 7:21 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 54 min |
| Apr 9, 7:21 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 54 min |
| Apr 9, 7:55 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll | 65 min |
| Apr 9, 7:21 PM EDT | Severe Thunderstorm Warning | LWX | Jefferson | 54 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.